S-24CS16A0I-J8T1G

Rev.5.2_00 S-24CS16A 2-WIRE CMOS SERIAL E2PROM The S-24CS16A is a 2-wired, low power and wide range operation 16 K-bit E2PROM organized as 2048 words × 8 bits. Page write and sequential read are available. „ Features • Low power consumption • Operating voltage range Standby: 5.0 µA Max. (VCC = 5.5 V) Read: 0.8 mA Max. (VCC = 5.5 V) Read: 1.8 to 5.5 V Write: 2.7 to 5.5 V 16 bytes / page • Page write: • Sequential read • Operating frequency: 400 kHz (VCC = 2.7 to 5.5 V) • Write disable function when power supply voltage is low • Endurance: 106 cycles / word*1 (at +25°C) write capable, 105 cycles / word*1 (at +85°C) *1. For each address (Word: 8 bits) • Data retention: 10 years (after rewriting 105 cycles / word at +85°C) • Write protection: 100% • Lead-free products „ Packages Package name 8-Pin DIP 8-Pin SOP(JEDEC) 8-Pin TSSOP WLP SNT-8A Drawing code Package Tape Reel Land DP008-F − − − FJ008-A FJ008-D FJ008-D − FT008-A FT008-E FT008-E − Please contact our sales office regarding the product with WLP package. PH008-A PH008-A PH008-A PH008-A Caution This product is intended to use in general electronic devices such as consumer electronics, office equipment, and communications devices. Before using the product in medical equipment or automobile equipment including car audio, keyless entry and engine control unit, contact to SII is indispensable. Seiko Instruments Inc. 1 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ Pin Configurations 8-Pin DIP Top view Table 1 Pin No. NC 1 8 VCC NC 2 7 WP A2 3 6 SCL GND 4 5 SDA Figure 1 S-24CS16A0I-D8S1G 1 2 3 4 5 6 Symbol NC*1 NC*1 A2*2 GND SDA SCL Description No connection No connection TEST pin Ground Serial data input / output Serial clock input Write protection input 7 WP Connected to VCC: Connected to GND: 8 VCC Power supply *1. Connect to GND or VCC. *2. Connect to GND. Protection valid Protection invalid Remark See Dimensions for details of the package drawings. 8-Pin SOP(JEDEC) Top view Table 2 Pin No. NC 1 8 VCC NC 2 7 WP A2 3 6 SCL GND 4 5 SDA Figure 2 S-24CS16A0I-J8T1G 1 2 3 4 5 6 Symbol NC*1 NC*1 A2*2 GND SDA SCL Description No connection No connection TEST pin Ground Serial data input / output Serial clock input Write protection input 7 WP Connected to VCC: Connected to GND: 8 VCC Power supply *1. Connect to GND or VCC. *2. Connect to GND. Protection valid Protection invalid Remark See Dimensions for details of the package drawings. 2 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 8-Pin TSSOP Top view Table 3 Pin No. NC NC A2 GND 1 2 3 4 8 7 6 5 VCC WP SCL SDA Figure 3 S-24CS16A0I-T8T1G 1 2 3 4 5 6 Symbol NC*1 NC*1 A2*2 GND SDA SCL Description No connection No connection TEST pin Ground Serial data input / output Serial clock input Write protection input 7 WP Connected to VCC: Connected to GND: 8 VCC Power supply *1. Connect to GND or VCC. *2. Connect to GND. Protection valid Protection invalid Remark See Dimensions for details of the package drawings. WLP Bottom view Table 4 Pin No. 1 A2 2 3 VCC WP 5 4 6 GND SDA SCL Figure 4 S-24CS16A0I-H6Tx 1 2 Symbol A2*1 VCC 3 WP 4 SCL 5 SDA 6 GND *1. Connect to GND. Description TEST pin Power supply Write protection input Connected to VCC: Connected to GND: Serial clock input Serial data input / output Ground Protection valid Protection invalid Remark Please contact our sales office regarding the product with WLP package. SNT-8A Top view Table 5 Pin No. A2 1 8 NC GND 2 7 NC SDA 3 SCL 4 6 VCC 5 WP Figure 5 S-24CS16A0I-I8T1G 1 2 3 4 Symbol A2*1 GND SDA SCL 5 WP Description TEST pin Ground Serial data input / output Serial clock input Write protection input Connected to VCC: Connected to GND: Power supply No connection No connection Protection valid Protection invalid 6 VCC NC*2 7 NC*2 8 *1. Connect to GND. *2. Connect to GND or VCC. Remark See Dimensions for details of the package drawings. Seiko Instruments Inc. 3 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ Block Diagram VCC WP SCL GND Start / Stop Detector SDA Voltage Detector Serial Clock Controller High-Voltage Generator LOAD Device Address Comparator COMP Data Register LOAD INC R/W Address Counter Y Decoder E2PROM Selector Data Output ACK Output Controller DIN DOUT Figure 6 4 X Decoder Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 „ Absolute Maximum Ratings Table 6 Item Power supply voltage Input voltage Output voltage Operating ambient temperature Storage temperature Absolute Maximum Rating −0.3 to +7.0 −0.3 to + 7.0 −0.3 to + 7.0 −40 to +85 −65 to +150 Symbol VCC VIN VOUT Topr Tstg Unit V V V °C °C Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. „ Recommended Operating Conditions Table 7 Item Symbol Power supply voltage VCC High level input voltage VIH Low level input voltage VIL Condition Read Operation Write Operation VCC = 2.7 to 5.5 V VCC = 1.8 to 2.7 V VCC = 2.7 to 5.5 V VCC = 1.8 to 2.7 V Min. 1.8 2.7 0.7 × VCC 0.8 × VCC 0.0 0.0 Typ. − − − − − − Max. 5.5 5.5 VCC VCC 0.3 × VCC 0.2 × VCC Unit V V V V V V „ Pin Capacitance Table 8 Item Input capacitance Input / output capacitance Symbol CIN CI / O (Ta = 25°C, f = 1.0 MHz, VCC = 5 V) Min. Typ. Max. Unit − − 10 pF − − 10 pF Condition VIN = 0 V (SCL, A2, WP) VI / O = 0 V (SDA) „ Endurance Table 9 Item Symbol Endurance NW *1. For each address (Word: 8 bits) Operation temperature −40 to +85°C Min. 105 Seiko Instruments Inc. Typ. − Max. − Unit cycles / word*1 5 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ DC Electrical Characteristics Table 10 Item Current consumption (READ) Current consumption (WRITE) Symbol Condition VCC = 4.5 to 5.5 V f = 400 kHz Min. Typ. Max. VCC = 2.7 to 4.5 V f = 100 kHz Min. Typ. Max. VCC = 1.8 to 2.7 V f = 100 kHz Min. Typ. Max. Unit ICC1 − − − 0.8 − − 0.5 − − 0.3 mA ICC2 − − − 4.0 − − 3.0 − − − mA Table 11 Item Standby current consumption Input leakage current Output leakage current Low level output voltage Current address hold voltage 6 Symbol Condition VCC = 4.5 to 5.5 V VCC = 2.7 to 4.5 V VCC = 1.8 to 2.7 V Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit ISB VIN = VCC or GND − − 5.0 − − 3.0 − − 3.0 µA ILI VIN = GND to VCC − 0.1 1.0 − 0.1 1.0 − 0.1 1.0 µA ILO VOUT = GND to VCC − 0.1 1.0 − 0.1 1.0 − 0.1 1.0 µA VOL IOL = 3.2 mA IOL = 1.5 mA − − − − 0.4 0.3 − − − − − 0.3 − − − − − 0.3 V V 1.5 − 5.5 1.5 − 4.5 1.5 − 2.7 V VAH − Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 „ AC Electrical Characteristics VCC Table 12 Measurement Conditions 0.1 × VCC to 0.9 × VCC 20 ns 0.5 × VCC 100 pF + Pull-up resistor 1.0 kΩ Input pulse voltage Input pulse rising / falling time Output judgement voltage Output load R = 1.0 kΩ SDA C = 100 pF Figure 7 Output Load Circuit Table 13 Item SCL clock frequency SCL clock time “L” SCL clock time ”H” SDA output delay time SDA output hold time Start condition setup time Start condition hold time Data input setup time Data input hold time Stop condition setup time SCL, SDA rising time SCL, SDA falling time Bus release time Noise suppression time VCC = 4.5 to 5.5 V Min. Typ. Max. 0 − 400 1.0 − − 0.9 − − 0.1 − 0.9 50 − − 0.6 − − 0.6 − − 100 − − 0 − − 0.6 − − − − 0.3 − − 0.3 1.3 − − − − 50 Symbol fSCL tLOW tHIGH tAA tDH tSU.STA tHD.STA tSU.DAT tHD.DAT tSU.STO tR tF tBUF tI tF tHIGH VCC = 2.7 to 4.5 V Min. Typ. Max. 0 − 400 1.0 − − 0.9 − − 0.1 − 0.9 50 − − 0.6 − − 0.6 − − 100 − − 0 − − 0.6 − − − − 0.3 − − 0.3 1.3 − − − − 100 tLOW VCC = 1.8 to 2.7 V Min. Typ. Max. 0 − 100 4.7 − − 4.0 − − 0.1 − 3.5 100 − − 4.7 − − 4.0 − − 200 − − 0 − − 4.0 − − − − 1.0 − − 0.3 4.7 − − − − 100 Unit kHz µs µs µs ns µs µs ns ns µs µs µs µs ns tR SCL tSU.STA tHD.DAT tHD.STA tSU.DAT tSU.STO SDA IN tAA tDH tBUF SDA OUT Figure 8 Bus Timing Seiko Instruments Inc. 7 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 Table 14 Item Write time Symbol tWR VCC = 2.7 to 5.5 V Min. − Typ. 4.0 Max. 10.0 Unit ms tWR SCL SDA D0 Stop Condition Write data Acknowledge Figure 9 Write Cycle Timing 8 Seiko Instruments Inc. Start Condition 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 „ Pin Functions 1. A2 (TEST) Pin The slave address cannot be assigned in the S-24CS16A since the addressing function is removed. The A2 pin should be connected to the GND. 2. SDA (Serial Data Input / Output) Pin The SDA pin is used for bi-directional transmission of serial data. It consists of a signal input pin and an Nch opendrain output pin. The SDA line is usually pulled up to the VCC, and OR-wired with other open-drain or open-collector output devices. 3. SCL (Serial Clock Input) Pin The SCL pin is used for serial clock input. Since signals are processed at the rising or falling edge of the SCL clock input signal, attention should be paid to the rising time and falling time to conform to the specifications. 4. WP (Write Protection Input) Pin The write protection is enabled by connecting the WP pin to the VCC. When there is no need for write protection, connect the pin to the GND. Seiko Instruments Inc. 9 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ Operation 1. Start Condition Start is identified by a high to low transition of the SDA line while the SCL line is stable at high. Every operation begins from a start condition. 2. Stop Condition Stop is identified by a low to high transition of the SDA line while the SCL line is stable at high. When a device receives a stop condition during a read sequence, the read operation is interrupted, and the device enters standby mode. When a device receives a stop condition during a write sequence, the reception of the write data is halted, and the E2PROM initiates a write cycle. tSU.STA tHD.STA tSU.STO SCL SDA Start Condition Stop Condition Figure 10 Start / Stop Conditions 10 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 3. Data Transmission Changing the SDA line while the SCL line is low, data is transmitted. Changing the SDA line while the SCL line is high, a start or stop condition is recognized. tSU.DAT tHD.DAT SCL SDA Figure 11 Data Transmission Timing 4. Acknowledge The unit of data transmission is 8 bits. During the 9th clock cycle period the receiver on the bus pulls down the SDA line to acknowledge the receipt of the 8-bit data. When an internal write cycle is in progress, the device does not generate an acknowledge. SCL 2 (E PROM Input) 1 8 9 SDA (Master Output) Acknowledge Output SDA 2 (E PROM Output) Start Condition tAA tDH Figure 12 Acknowledge Output Timing Seiko Instruments Inc. 11 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 5. Device Addressing To start communication, the master device on the system generates a start condition to the bus line. Next, the master device sends 7-bit device address and a 1-bit read / write instruction code on to the SDA bus. The 4 most significant bits of the device address are called the “Device Code”, and are fixed to “1010”. The successive 3 bits (P2, P1 and P0) are used to define a page address and choose the eight 256-byte memory blocks. Device Code 1 0 1 Page Address 0 P2 P1 MSB R/W LSB Figure 13 Device Address 12 P0 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 6. Write 6. 1 Byte Write When the master sends a 7-bit device address and a 1-bit read / write instruction code set to “0”, following a start condition, the E2PROM acknowledges it. The E2PROM then receives an 8-bit word address and responds with an acknowledge. After the E2PROM receives 8-bit write data and responds with an acknowledge, it receives a stop condition and that initiates the write cycle at the addressed memory. During the write cycle all operations are forbidden and no acknowledge is generated. S T A R T SDA LINE DEVICE ADDRESS 1 M S B W R I T E 0 1 0 P2 P1 P0 0 WORD ADDRESS DATA W7 W6 W5 W4 W3 W2 W1 W0 D7 D6 D5 D4 D3 D2 D1 D0 L R A S / C B W K A A C C K K S T O P A C K ADR INC (ADDRESS INCREMENT) Figure 14 Byte Write Seiko Instruments Inc. 13 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 6. 2 Page Write The page write mode allows up to 16 bytes to be written in a single write operation in the S-24CS16A. Basic data transmission procedure is the same as that in the “Byte Write”. But instead of generating a stop condition, the master transmitts 8-bit write data up to 8 bytes before the page write. When the E2PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “0”, following a start condition, it generates an acknowledge. Then the E2PROM receives an 8-bit word address, and responds with an acknowledge. After the E2PROM receives 8-bit write data and responds with an acknowledge, it receives 8-bit write data corresponding to the next word address, and generates an acknowledge. The E2PROM repeats reception of 8-bit write data and generation of acknowledge in succession. The E2PROM can receive as many write data as the maximum page size. Receiving a stop condition initiates a write cycle of the area starting from the designated memory address and having the page size equal to the received write data. S T A R T SDA LINE W R I T E WORD ADDRESS (n) DATA (n) 1 0 1 0 P2 P1 P0 0 W7W6 W5W4 W3 W2 W1W0 D7 D6 D5 D4 D3 D2 D1 D0 DEVICE ADDRESS M S B L R A S / C BWK DATA (n+1) A C K D7 A C K ADR INC S T O P DATA (n+x) D0 D7 A C K ADR INC D0 A C K ADR INC Figure 15 Page Write In S-24CS16A, the lower 4 bits of the word address are automatically incremented every time when the E2PROM receives 8-bit write data. If the size of the write data exceeds 16 bytes, the upper 4 bits of the word address and page address (P2, P1 and P0) remain unchanged, and the lower 4 bits are rolled over and previously received data will be overwritten. 14 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 6. 3 Write Protection Write protection is available in the S-24CS16A. When the WP pin is connected to the VCC, write operation to memory area is forbidden at all. When the WP pin is connected to the GND, the write protection is invalid, and write operation in all memory area is available. Fix the level of the WP pin from the rising edge of SCL for loading the last write data (D0) until the end of the write time (10 ms max.). If the WP pin changes during this time, the address data being written at this time is not guaranteed. There is no need for using write protection, the WP pin should be connected to the GND. The write protection is valid in the operating voltage range. tWR SCL D0 SDA Write Data Acknowledge Stop Condition Start Condition WP WP Pin Fixed Period Figure 16 WP Pin Fixed Period 6. 4 Acknowledge Polling Acknowledge polling is used to know the completion of the write cycle in the E2PROM. After the E2PROM receives a stop condition and once starts the write cycle, all operations are forbidden and no response is made to the signal transmitted by the master device. Accordingly the master device can recognize the completion of the write cycle in the E2PROM by detecting a response from the slave device after transmitting the start condition, the device address and the read / write instruction code to the E2PROM, namely to the slave devices. That is, if the E2PROM does not generate an acknowledge, the write cycle is in progress and if the E2PROM generates an acknowledge, the write cycle has been completed. Keep the level of the WP pin fixed until acknowledge is confirmed. It is recommended to use the read instruction “1” as the read / write instruction code transmitted by the master device. Seiko Instruments Inc. 15 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 7. Read 7. 1 Current Address Read Either in writing or in reading the E2PROM holds the last accessed memory address, internally incremented by one. The memory address is maintained as long as the power voltage is higher than the current address hold voltage VAH. The master device can read the data at the memory address of the current address pointer without assigning the word address as a result, when it recognizes the position of the address pointer in the E2PROM. This is called “Current Address Read”. In the following the address counter in the E2PROM is assumed to be “n”. When the E2PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “1” following a start condition, it responds with an acknowledge. However, the page address (P2, P1 and P0) become invalid and the memory address of the current address pointer becomes valid. Next an 8-bit data at the address “n” is sent from the E2PROM synchronous to the SCL clock. The address counter is incremented at the falling edge of the SCL clock for the 8th bit data, and the content of the address counter becomes n+1. The master device outputs stop condition not an acknowledge, the reading of E2PROM is ended. S T A R T SDA LINE DEVICE ADDRESS 1 M S B 0 1 NO ACK from Master Device R E A D S T O P DATA 0 P2 P1 P0 1 L R S / B W D7 D6 D5 D4 D3 D2 D1 D0 A C K ADR INC Figure 17 Current Address Read Attention should be paid to the following point on the recognition of the address pointer in the E2PROM. In the read operation the memory address counter in the E2PROM is automatically incremented at every falling edge of the SCL clock for the 8th bit of the output data. In the write operation, on the other hand, the upper bits of the memory address (the upper bits of the word address and page address)*1 are left unchanged and are not incremented at the falling edge of the SCL clock for the 8th bit of the received data. *1. The upper 4 bits of the word address and the page address P2, P1 and P0. 16 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 7. 2 Random Read Random read is used to read the data at an arbitrary memory address. A dummy write is performed to load the memory address into the address counter. When the E2PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “0” following a start condition, it responds with an acknowledge. The E2PROM then receives an 8-bit word address and responds with an acknowledge. The memory address is loaded to the address counter in the E2PROM by these operations. Reception of write data does not follow in a dummy write whereas reception of write data follows in a byte write and in a page write. Since the memory address is loaded into the memory address counter by dummy write, the master device can read the data starting from the arbitrary memory address by transmitting a new start condition and performing the same operation in the current address read. That is, when the E2PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “1”, following a start condition signal, it responds with an acknowledge. Next, 8-bit data is transmitted from the E2PROM in synchronous to the SCL clock. The master device outputs stop condition not an acknowledge, the reading of E2PROM is ended. S T A R T SDA LINE DEVICE ADDRESS W R I T E 1 0 1 0 P2 P1 P0 0 M S B S T A R T WORD ADDRESS (n) 1 0 1 0 P2 P1 P0 1 W7 W6 W5 W4 W3 W2 W1 W0 L R A S / C B W K DEVICE ADDRESS R E A D A C K M S B L R A S / C B W K NO ACK from Master Device S T O P DATA D7 D6 D5 D4 D3 D2 D1 D0 ADR INC DUMMY WRITE Figure 18 Random Read Seiko Instruments Inc. 17 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 7. 3 Sequential Read When the E2PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “1” following a start condition both in current and random read operations, it responds with an acknowledge. An 8-bit data is then sent from the E2PROM synchronous to the SCL clock and the address counter is automatically incremented at the falling edge of the SCL clock for the 8th bit data. When the master device responds with an acknowledge, the data at the next memory address is transmitted. Response with an acknowledge by the master device has the memory address counter in the E2PROM incremented and makes it possible to read data in succession. This is called “Sequential Read”. The master device outputs stop condition not an acknowledge, the reading of E2PROM is ended. Data can be read in succession in the sequential read mode. When the memory address counter reaches the last word address, it rolls over to the first memory address. NO ACK from Master Device R E DEVICE A ADDRESS D SDA LINE 1 R A / C W K A C K D7 D0 A C K D0 D7 DATA (n) ADR INC D7 DATA (n+1) ADR INC Figure 19 Sequential Read 18 S T O P A C K Seiko Instruments Inc. D0 D7 DATA (n+2) ADR INC D0 DATA (n+x) ADR INC 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 8. Address Increment Timing The timing for the automatic address increment is the falling edge of the SCL clock for the 8th bit of the read data in read operation and the falling edge of the SCL clock for the 8th bit of the received data in write operation. SCL SDA 8 R/W=1 9 1 ACK Output D7 Output 8 9 D0 Output Address Increment Figure 20 Address Increment Timing in Reading SCL SDA 8 R/W=0 9 1 ACK Output D7 Input 8 D0 Input 9 ACK Output Address Increment Figure 21 Address Increment Timing in Writing „ Write Inhibition Function at Low Power Voltage The S-24CS16A has a detection circuit for low power voltage. The detection circuit cancels a write instruction when the power voltage is low or the power switch is on. The detection voltage is 1.85 V typically and the release voltage is 1.95 V typically, the hysteresis of approximate 0.1 V thus exists. (See Figure 22.) When a low power voltage is detected, a write instruction is canceled at the reception of a stop condition. When the power voltage lowers during a data transmission or a write operation, the data at the address of the operation is not assured. Hysteresis width 0.1 V approximately Power supply voltage Release voltage (+VDET) 1.95 V Typ. Detection voltage (−VDET) 1.85 V Typ. Write Instruction cancel Figure 22 Operation at Low Power Voltage Seiko Instruments Inc. 19 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ Using S-24CS16A 1. Adding a pull-up resistor to SDA I/O pin and SCL input pin Add a 1 to 5 kΩ pull-up resistor to the SCL input pin*1 and the SDA I/O pin in order to enable the functions of the I2C bus protocol. Normal communication cannot be provided without a pull-up resistor. *1. When the SCL input pin of the E2PROM is connected to a tri-state output pin of the microprocessor, connect the same pull-up resistor to prevent a high impedance status from being input to the SCL input pin. This protects the E2PROM from malfunction due to an undefined output (high impedance) from the tri-state pin when the microprocessor is reset when the voltage drops. 2. I/O pin equivalent circuit The I/O pins of this IC do not include pull-up and pull-down resistors. The SDA pin is an open-drain output. The following shows the equivalent circuits. SCL Figure 23 SCL Pin SDA Figure 24 SDA Pin WP Figure 25 WP Pin 20 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 3. Matching phases while E2PROM is accessed The S-24CS16A does not have a pin for resetting (the internal circuit), therefore, the E2PROM cannot be forcibly reset externally. If a communication interruption occurs in the E2PROM, it must be reset by software. For example, even if a reset signal is input to the microprocessor, the internal circuit of the E2PROM is not reset as long as the stop condition is not input to the E2PROM. In other words, the E2PROM retains the same status and cannot shift to the next operation. This symptom applies to the case when only the microprocessor is reset when the power supply voltage drops. With this status, if the power supply voltage is restored, reset the E2PROM (after matching the phase with the microprocessor) and input an instruction. The following shows this reset method. [How to reset E2PROM] The E2PROM can be reset by the start and stop instructions. When the E2PROM is reading data “0” or is outputting the acknowledge signal, 0 is output to the SDA line. In this status, the microprocessor cannot output an instruction to the SDA line. In this case, terminate the acknowledge output operation or read operation, and then input a start instruction. Figure 26 shows this procedure. First, input the start condition. Then transmit 9 clocks (dummy clocks) of SCL. During this time, the microprocessor sets the SDA line to high level. By this operation, the E2PROM interrupts the acknowledge output operation or data output, so input the start condition*1. When a start condition is input, the E2PROM is reset. To make doubly sure, input the stop condition to the E2PROM. Normal operation is then possible. Start Dummy clock condition 1 2 8 Start Stop condition condition 9 SCL SDA Figure 26 Resetting E2PROM *1. After 9 clocks (dummy clocks), if the SCL clock continues to be output without a start condition being input, a write operation may be started upon receipt of a stop condition. To prevent this, input a start condition after 9 clocks (dummy clocks). Remark It is recommended to perform the above reset using dummy clocks when the system is initialized after the power supply voltage has been raised. Seiko Instruments Inc. 21 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 4. Acknowledge check The I2C-bus protocol includes an acknowledge check function as a handshake function to prevent a communication error. This function allows detection of a communication failure during data communication between the microprocessor and E2PROM. This function is effective to prevent malfunction, so it is recommended to perform an acknowledge check on the microprocessor side. 5. Built-in power-on-clear circuit E2PROMs have a built-in power-on-clear circuit that initializes the E2PROM. Unsuccessful initialization may cause a malfunction. For the power-on-clear circuit to operate normally, the following conditions must be satisfied for raising the power supply voltage. 5. 1 Raising power supply voltage Raise the power supply voltage, starting at 0.2 V maximum, so that the voltage reaches the power supply voltage to be used within the time defined by tRISE as shown in Figure 27. For example, when the power supply voltage to be used is 5.0 V, tRISE is 200 ms as shown in Figure 28. The power supply voltage must be raised within 200 ms. tRISE (Max.) Power supply voltage (VCC) VINIT (Max.) 0.2 V 0V *1 *2 tINIT (Max.) *1. 0 V means there is no difference in potential between the VCC pin and the GND pin of the E2PROM. *2. tINIT is the time required to initialize the E2PROM. No instructions are accepted during this time. Figure 27 Raising Power Supply Voltage 22 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 5.0 4.0 Power supply voltage (VCC) [V] 3.0 2.0 50 100 150 200 Rise time (tRISE) Max. [ms] For example: If your E2PROM supply voltage = 5.0 V, raise the power supply voltage to 5.0 V within 200 ms. Figure 28 Raising Time of Power Supply Voltage When initialization is successfully completed via the power-on-clear circuit, the E2PROM enters the standby status. If the power-on-clear circuit does not operate, the following are the possible causes. (1) Because the E2PROM has not been initialized, an instruction formerly input is valid or an instruction may be inappropriately recognized. In this case, writing may be performed. (2) The voltage may have dropped due to power off while the E2PROM is being accessed. Even if the microprocessor is reset due to the low power voltage, the E2PROM may malfunction unless the power-on-clear operation conditions of E2PROM are satisfied. For the power-on-clear operation conditions of E2PROM, refer to 5.1 Raising power supply voltage. If the power-on-clear circuit does not operate, match the phase (reset) so that the internal E2PROM circuit is normally reset. The statuses of the E2PROM immediately after the power-on-clear circuit operates and when phase is matched (reset) are the same. Seiko Instruments Inc. 23 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 5. 2 Wait for the initialization sequence to end The E2PROM executes initialization during the time that the supply voltage is increasing to its normal value. All instructions must wait until after initialization. The relationship between the initialization time (tINIT) and rise time (tRISE) is shown in Figure 29. 100 m 10 m 2 E PROM initialization time 1.0 m (tINIT) Max. [s] 100 µ 10 µ 1.0 µ 1.0 µ 10 µ 100 µ 1.0 m 10 m 100 m Rise time (tRISE) [s] Figure 29 Initialization Time of E2PROM 24 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 6. Data hold time (tHD.DAT = 0 ns) If SCL and SDA of the E2PROM are changed at the same time, it is necessary to prevent the start / stop condition from being mistakenly recognized due to the effect of noise. If a start/stop condition is mistakenly recognized during communication, the E2PROM enters the standby status. It is recommended that SDA is delayed from the falling edge of SCL by 0.3 µs minimum in the S-24CS16A. This is to prevent time lag caused by the load of the bus line from generating the stop (or start) condition. tHD.DAT = 0.3 µs Min. SCL SDA Figure 30 E2PROM Data Hold Time 7. SDA pin and SCL pin noise suppression time The S-24CS16A includes a built-in low-pass filter to suppress noise at the SDA and SCL pins. This means that if the power supply voltage is 5.0 V, noise with a pulse width of 160 ns or less can be suppressed. The guaranteed for details, refer to noise suppression time (tI) in Table 13. 300 Noise suppression time (tI) Max. 200 [ns] 100 2 3 4 5 Power supply voltage (VCC) [V] Figure 31 Noise Suppression Time for SDA and SCL Pins Seiko Instruments Inc. 25 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 8. Trap: E2PROM operation in case that the stop condition is received during write operation before receiving the defined data value (less than 8-bit) to SCL pin When the E2PROM receives the stop condition signal compulsorily, during receiving 1 byte of write data, “write” operation is aborted. When the E2PROM receives the stop condition signal after receiving 1 byte or more of data for “page write”, 8-bit of data received normally before receiving the stop condition signal can be written. 9. Trap: E2PROM operation and write data in case that write data is input more than defined page size at “page write” When write data is input more than defined page size at page write operation, for example, S-24CS16A (which can be executed 16-byte page write) is received data more than 17 byte, 8-bit data of the 17th byte is over written to the first byte in the same page. Data over the capacity of page address cannot be written. 10. Trap: Severe environments Absolute maximum ratings: Do not operate these ICs in excess of the absolute maximum ratings (as listed on the data sheet). Exceeding the supply voltage rating can cause latch-up. Operations with moisture on the E2PROM pins may occur malfunction by short-circuit between pins. Especially, in occasions like picking the E2PROM up from low temperature tank during the evaluation. Be sure that not remain frost on E2PROM pin to prevent malfunction by short-circuit. Also attention should be paid in using on environment, which is easy to dew for the same reason. 26 Seiko Instruments Inc. 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 „ Precautions ● Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. ● SII claims no responsibility for any and all disputes arising out of or in connection with any infringement of the products including this IC upon patents owned by a third party. „ Precautions for WLP package ● The side of device silicon substrate is exposed to the marking side of device package. Since this portion has lower strength against the mechanical stress than the standard plastic package, chip, crack, etc should be careful of the handing of a package enough. Moreover, the exposed side of silicon has electrical potential of device substrate, and needs to be kept out of contact with the external potential. ● In this package, the overcoat of the resin of translucence is carried out on the side of device area. Keep it mind that it may affect the characteristic of a device when exposed a device in the bottom of a high light source. Seiko Instruments Inc. 27 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ Characteristics (Typical Data) 1. DC Characteristics 1. 1 Current consumption (READ) ICC1 vs. Ambient temperature Ta 1. 2 Current consumption (READ) ICC1 vs. Ambient temperature Ta VCC = 5.5 V fSCL = 100 kHz DATA = 0101 ICC1 (µA) VCC = 3.3 V fSCL = 100 kHz DATA = 0101 300 300 ICC1 (µA) 200 200 100 0 100 –40 0 Ta (°C) 0 85 1. 3 Current consumption (READ) ICC1 vs. Ambient temperature Ta –40 Ta = 25 °C fSCL = 100 kHz DATA = 0101 300 300 ICC1 (µA) 200 200 100 100 0 –40 0 0 Ta (°C) 85 1. 5 Current consumption (READ) ICC1 vs. Power supply voltage VCC 500 ICC1 (µA) 400 300 200 200 100 100 28 3 4 5 VCC (V) 3 4 5 VCC (V) 6 7 VCC = 5.0 V Ta = 25 °C 500 ICC1 400 (µA) 300 2 2 1. 6 Current consumption (READ) ICC1 vs. Clock frequency fSCL Ta = 25 °C fSCL = 400 kHz DATA = 0101 0 85 1. 4 Current consumption (READ) ICC1 vs. Power supply voltage VCC VCC = 1.8 V fSCL = 100 kHz DATA = 0101 ICC1 (µA) 0 Ta (°C) 6 0 7 Seiko Instruments Inc. 100k 400k fSCL (Hz) 1M 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 1. 7 Current consumption (PROGRAM) ICC2 vs. Ambient temperature Ta 1. 8 Current consumption (PROGRAM) ICC2 vs. Ambient temperature Ta VCC = 5.5 V VCC = 3.3 V 1.0 1.0 ICC2 (mA) ICC2 (mA) 0.5 0 0.5 –40 0 Ta (°C) 0 85 1. 9 Current consumption (PROGRAM) ICC2 vs. Ambient temperature Ta –40 0 Ta (°C) 85 1. 10 Current consumption (PROGRAM) ICC2 vs. Power supply voltage VCC Ta = 25 °C VCC = 2.7 V 1.0 1.0 ICC2 (mA) ICC2 (mA) 0.5 0 0.5 –40 0 85 0 1 Ta (°C) 1. 11 Standby current consumption ISB vs. Ambient temperature Ta 2 3 4 VCC (V) 5 6 1. 12 Input leakage current ILI vs. Ambient temperature Ta VCC = 5.5 V SDA, SCL, WP = 0 V VCC = 5.5 V 2.0 1.0 ISB (µA) ILI (µA) 1.0 0 0.5 –40 0 Ta (°C) 0 85 Seiko Instruments Inc. –40 0 Ta (°C) 85 29 2-WIRE CMOS SERIAL E2PROM S-24CS16A 1. 13 Input leakage current ILI vs. Ambient temperature Ta Rev.5.200 1. 14 Output leakage current ILO vs. Ambient temperature Ta VCC = 5.5 V SDA, SCL, WP = 5.5 V VCC = 5.5 V SDA = 0 V 1.0 1.0 ILI (µA) ILO (µA) 0.5 0 0.5 –40 0 Ta (°C) 0 85 1. 15 Output leakage current ILO vs. Ambient temperature Ta –40 0 Ta (°C) 1. 16 Low level output voltage VOL vs. Low level output current IOL VCC = 5.5 V SDA = 5.5 V Ta = –40 °C 0.3 1.0 ILO (µA) VOL (V) VCC = 1.8 V 0.2 0.5 VCC = 5.0 V 0.1 0 –40 0 Ta (°C) 0 85 1. 17 Low level output voltage VOL vs. Low level output current IOL 0.3 VOL (V) Ta = 25 °C VCC = 1.8 V 2 3 4 IOL (mA) 5 6 Ta = 85 °C 0.3 VCC = 1.8 V VOL (V) VCC = 5.0 V 0.1 30 1 1. 18 Low level output voltage VOL vs. Low level output current IOL 0.2 0 85 0.2 VCC = 5.0 V 0.1 1 2 3 4 IOL (mA) 5 0 6 Seiko Instruments Inc. 1 2 3 4 5 IOL (mA) 6 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 1. 19 High input inversion voltage VIH vs. Power supply voltage VCC 1. 20 High input inversion voltage VIH vs. Ambient temperature Ta VCC = 5.0 V SDA, SCL Ta = 25 °C SDA, SCL 3.0 VIH (V) 3.0 VIH (V) 2.0 1.0 0 2.0 1.0 1 2 3 4 5 VCC (V) 6 0 7 1. 21 Low input inversion voltage VIL vs. Power supply voltage VCC –40 VCC = 5.0 V SDA, SCL 3.0 3.0 2.0 VIL 2.0 (V) 1.0 1.0 0 0 1 2 3 4 5 VCC (V) 85 1. 22 Low input inversion voltage VIL vs. Ambient temperature Ta Ta = 25 °C SDA, SCL VIL (V) 0 Ta (°C) 6 7 1. 23 Low power supply detection voltage −VDET vs. Ambient temperature Ta 2.0 –40 85 0 Ta (°C) 1. 24 Low power supply release voltage +VDET vs. Ambient temperature Ta 2.0 +VDET (V) –VDET (V) 1.0 1.0 0 –40 0 Ta (°C) 85 0 Seiko Instruments Inc. –40 0 Ta (°C) 85 31 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 2. AC Characteristics 2. 1 Maximum operating frequency fMAX. vs. Power supply voltage VCC 2. 2 Write time tWR vs. Power supply voltage VCC Ta = 25 °C fMAX. (Hz) Ta = 25 °C 8 1M tWR (ms) 100k 6 4 10k 2 1 2 3 4 VCC (V) 0 5 2. 3 Write time tWR vs. Ambient temperature Ta VCC = 4.5 V 5 VCC = 2.7 V 9 6 tWR (ms) 3 6 3 0 –40 0 Ta (°C) 0 85 2. 5 SDA output delay time tAA vs. Ambient temperature Ta –40 0 Ta (°C) 85 2. 6 SDA output delay time tAA vs. Ambient temperature Ta VCC = 4.5 V VCC = 2.7 V 1.0 1.0 tAA (µs) tAA (µs) 0.5 0 32 2 3 4 VCC (V) 0.5 –40 0 Ta (°C) 6 2. 4 Write time tWR vs. Ambient temperature Ta 9 tWR (ms) 1 0 85 Seiko Instruments Inc. –40 0 Ta (°C) 85 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.2_00 2. 7 SDA output delay time tAA vs. Ambient temperature Ta VCC = 1.8 V 1.0 tAA (µs) 0.5 0 –40 0 Ta (°C) 85 Seiko Instruments Inc. 33 2-WIRE CMOS SERIAL E2PROM S-24CS16A Rev.5.200 „ Product Name Structure 1. 8-Pin DIP, 8-Pin SOP(JEDEC), 8-Pin TSSOP, SNT-8A Packages S-24CS16A 0I - xxxx G Package name (abbreviation) and IC packing specifications D8S1 : 8-Pin DIP, Tube J8T1 : 8-Pin SOP (JEDEC), Tape T8T1 : 8-Pin TSSOP, Tape I8T1 : SNT-8A, Tape Fixed Product name S-24CS16A: 16 Kbit 2. WLP Package S-24CS16A 0I - H6Tx Package name (abbreviation) and IC packing specifications H6Tx : WLP, Tape Fixed Product name S-24CS16A: 16 Kbit Remark Please contact our sales office regarding the product with WLP package. 34 Seiko Instruments Inc. 9.6(10.6max.) 8 5 1 4 0.89 7.62 1.3 2.54 0.48±0.1 +0.11 0.25 -0.05 0° to 15° No. DP008-F-P-SD-3.0 TITLE DIP8-F-PKG Dimensions DP008-F-P-SD-3.0 No. SCALE UNIT mm Seiko Instruments Inc. 5.02±0.2 8 5 1 4 1.27 0.20±0.05 0.4±0.05 No. FJ008-A-P-SD-2.1 TITLE No. SOP8J-D-PKG Dimensions FJ008-A-P-SD-2.1 SCALE UNIT mm Seiko Instruments Inc. 4.0±0.1(10 pitches:40.0±0.2) 2.0±0.05 ø1.55±0.05 0.3±0.05 ø2.0±0.05 8.0±0.1 2.1±0.1 5°max. 6.7±0.1 1 8 4 5 Feed direction No. FJ008-D-C-SD-1.1 TITLE SOP8J-D-Carrier Tape No. FJ008-D-C-SD-1.1 SCALE UNIT mm Seiko Instruments Inc. 60° 2±0.5 13.5±0.5 Enlarged drawing in the central part ø21±0.8 2±0.5 ø13±0.2 No. FJ008-D-R-SD-1.1 TITLE SOP8J-D-Reel No. FJ008-D-R-SD-1.1 SCALE UNIT QTY. mm Seiko Instruments Inc. 2,000 +0.3 3.00 -0.2 8 5 1 4 0.17±0.05 0.2±0.1 0.65 No. FT008-A-P-SD-1.1 TITLE TSSOP8-E-PKG Dimensions FT008-A-P-SD-1.1 No. SCALE UNIT mm Seiko Instruments Inc. 4.0±0.1 2.0±0.05 ø1.55±0.05 0.3±0.05 +0.1 8.0±0.1 ø1.55 -0.05 (4.4) +0.4 6.6 -0.2 1 8 4 5 Feed direction No. FT008-E-C-SD-1.0 TITLE TSSOP8-E-Carrier Tape FT008-E-C-SD-1.0 No. SCALE UNIT mm Seiko Instruments Inc. 13.4±1.0 17.5±1.0 Enlarged drawing in the central part ø21±0.8 2±0.5 ø13±0.5 No. FT008-E-R-SD-1.0 TSSOP8-E-Reel TITLE No. FT008-E-R-SD-1.0 SCALE QTY. UNIT mm Seiko Instruments Inc. 3,000 1.97±0.03 8 7 6 5 3 4 +0.05 1 0.5 2 0.08 -0.02 0.48±0.02 0.2±0.05 No. PH008-A-P-SD-2.0 TITLE SNT-8A-A-PKG Dimensions PH008-A-P-SD-2.0 No. SCALE UNIT mm Seiko Instruments Inc. +0.1 ø1.5 -0 5° 2.25±0.05 4.0±0.1 2.0±0.05 ø0.5±0.1 0.25±0.05 0.65±0.05 4.0±0.1 4 321 5 6 78 Feed direction No. PH008-A-C-SD-1.0 TITLE SNT-8A-A-Carrier Tape PH008-A-C-SD-1.0 No. SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.0±0.3 Enlarged drawing in the central part ø13±0.2 (60°) (60°) No. PH008-A-R-SD-1.0 TITLE SNT-8A-A-Reel No. PH008-A-R-SD-1.0 SCALE UNIT QTY. mm Seiko Instruments Inc. 5,000 0.52 2.01 0.52 0.3 0.2 0.3 0.2 0.3 0.2 0.3 Caution Making the wire pattern under the package is possible. However, note that the package may be upraised due to the thickness made by the silk screen printing and of a solder resist on the pattern because this package does not have the standoff. No. PH008-A-L-SD-3.0 TITLE SNT-8A-A-Land Recommendation PH008-A-L-SD-3.0 No. SCALE UNIT mm Seiko Instruments Inc. • • • • • • The information described herein is subject to change without notice. Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. When the products described herein are regulated products subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.