CAT24C256HU4IGT3

DATA SHEET www.onsemi.com EEPROM Serial 256-Kb I2C CAT24C256 SOIC−8 W SUFFIX CASE 751BD Description The CAT24C256 is a EEPROM Serial 256−Kb I2C, internally organized as 32,768 words of 8 bits each. It features a 64−byte page write buffer and supports the Standard (100 kHz), Fast (400 kHz) and Fast−Plus (1 MHz) I2C protocol. Write operations can be inhibited by taking the WP pin High (this protects the entire memory). External address pins make it possible to address up to eight CAT24C256 devices on the same bus. On−Chip ECC (Error Correction Code) makes the device suitable for high reliability applications. TSSOP−8 Y SUFFIX CASE 948AL UDFN−8 HU4 SUFFIX CASE 517AZ PIN CONFIGURATION A0 1 VCC Features A1 WP • • • • • A2 SCL VSS SDA • • • • • • Supports Standard, Fast and Fast−Plus I2C Protocol 1.8 V to 5.5 V Supply Voltage Range 64−Byte Page Write Buffer Hardware Write Protection for Entire Memory Schmitt Triggers and Noise Suppression Filters on I2C Bus Inputs (SCL and SDA) Low Power CMOS Technology 1,000,000 Program/Erase Cycles 100 Year Data Retention Industrial and Extended Temperature Range SOIC, TSSOP and UDFN 8−Pad Packages This Device is Pb−Free, Halogen Free/BFR Free, and RoHS Compliant VCC PIN FUNCTION Pin Name† A0, A1, A2 Function Device Address SDA Serial Data SCL Serial Clock WP Write Protect VCC Power Supply VSS Ground †The exposed pad for the UDFN packages can be left floating or connected to Ground. SCL CAT24C256 A2, A1, A0 SOIC (W, X), TSSOP (Y), UDFN (HU4) For the location of Pin 1, please consult the corresponding package drawing. SDA ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. WP VSS Figure 1. Functional Symbol © Semiconductor Components Industries, LLC, 2014 February, 2022 − Rev. 16 1 Publication Order Number: CAT24C256/D CAT24C256 Table 1. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units Storage Temperature –65 to +150 °C Voltage on any Pin with Respect to Ground (Note 1) –0.5 to +6.5 V Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. The DC input voltage on any pin should not be lower than −0.5 V or higher than VCC + 0.5 V. During transitions, the voltage on any pin may undershoot to no less than −1.5 V or overshoot to no more than VCC + 1.5 V, for periods of less than 20 ns. Table 2. RELIABILITY CHARACTERISTICS (Note 2) Parameter Symbol NEND (Notes 3, 4) TDR Endurance Min Units 1,000,000 Program/Erase Cycles 100 Years Data Retention 2. These parameters are tested initially and after a design or process change that affects the parameter according to appropriate AEC−Q100 and JEDEC test methods. 3. Page Mode, VCC = 5 V, 25°C. 4. The product uses ECC (Error Correction Code) logic with 6 ECC bits to correct one bit error in 4 data bytes. Therefore, when a single byte has to be written, 4 bytes (including the ECC bits) are re−programmed. It is recommended to write by multiple of 4 bytes in order to benefit from the maximum number of write cycles. Table 3. D.C. OPERATING CHARACTERISTICS (VCC = 1.8 V to 5.5 V, TA = −40°C to +85°C and VCC = 2.5 V to 5.5 V, TA = −40°C to +125°C, unless otherwise specified.) Parameter Symbol ICCR Read Current ICCW Write Current ISB IL Standby Current I/O Pin Leakage Test Conditions Min Max Units 1 mA 3 mA TA = −40°C to +85°C 2 mA TA = −40°C to +125°C 5 TA = −40°C to +85°C 1 TA = −40°C to +125°C 2 Read, fSCL = 400 kHz/1 MHz All I/O Pins at GND or VCC Pin at GND or VCC mA VIL1 Input Low Voltage 2.5 V ≤ VCC ≤ 5.5 V −0.5 0.3 VCC V VIL2 Input Low Voltage 1.8 V ≤ VCC < 2.5 V −0.5 0.25 VCC V VIH1 Input High Voltage 2.5 V ≤ VCC ≤ 5.5 V 0.7 VCC VCC + 0.5 V VIH2 Input High Voltage 1.8 V ≤ VCC < 2.5 V 0.75 VCC VCC + 0.5 V VOL1 Output Low Voltage VCC ≥ 2.5 V, IOL = 3.0 mA 0.4 V VOL2 Output Low Voltage VCC < 2.5 V, IOL = 1.0 mA 0.2 V Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. Table 4. PIN IMPEDANCE CHARACTERISTICS (VCC = 1.8 V to 5.5 V, TA = −40°C to +85°C and VCC = 2.5 V to 5.5 V, TA = −40°C to +125°C, unless otherwise specified.) Symbol Parameter Conditions Max Units 8 pF CIN (Note 5) SDA I/O Pin Capacitance VIN = 0 V CIN (Note 5) Input Capacitance (other pins) VIN = 0 V 6 pF WP Input Current, Address Input Current (A0, A1, A2) VIN < VIH, VCC = 5.5 V 75 mA VIN < VIH, VCC = 3.3 V 50 VIN < VIH, VCC = 1.8 V 25 VIN > VIH 2 IWP, IA (Note 6) 5. These parameters are tested initially and after a design or process change that affects the parameter according to appropriate AEC−Q100 and JEDEC test methods. 6. When not driven, the WP, A0, A1, A2 pins are pulled down to GND internally. For improved noise immunity, the internal pull−down is relatively strong; therefore the external driver must be able to supply the pull−down current when attempting to drive the input HIGH. To conserve power, as the input level exceeds the trip point of the CMOS input buffer (~ 0.5 x VCC), the strong pull−down reverts to a weak current source. www.onsemi.com 2 CAT24C256 Table 5. A.C. TEST CONDITIONS Input Levels 0.2 x VCC to 0.8 x VCC Input Rise and Fall Times ≤ 50 ns Input Reference Levels 0.3 x VCC, 0.7 x VCC Output Reference Levels 0.5 x VCC Output Load Current Source: IL = 3 mA (VCC ≥ 2.5 V); IL = 1 mA (VCC < 2.5 V); CL = 100 pF Table 6. A.C. CHARACTERISTICS (Note 7) (VCC = 1.8 V to 5.5 V, TA = −40°C to +85°C and VCC = 2.5 V to 5.5 V, TA = −40°C to +125°C, unless otherwise specified.) Standard VCC = 1.8 V − 5.5 V Symbol FSCL tHD:STA Parameter Min Max Clock Frequency START Condition Hold Time Fast VCC = 1.8 V − 5.5 V Min 100 Max Fast−Plus VCC = 2.5 V − 5.5 V TA = −405C to +855C Min 400 Max Units 1,000 kHz 4 0.6 0.25 ms tLOW Low Period of SCL Clock 4.7 1.3 0.45 ms tHIGH High Period of SCL Clock 4 0.6 0.40 ms 4.7 0.6 0.25 ms 0 0 ms tSU:STA START Condition Setup Time tHD:DAT Data In Hold Time 0 tSU:DAT Data In Setup Time 250 100 50 ns tR (Note 8) SDA and SCL Rise Time 1,000 300 100 ns tF (Note 8) SDA and SCL Fall Time 300 300 100 ns tSU:STO STOP Condition Setup Time tBUF Bus Free Time Between STOP and START tAA SCL Low to Data Out Valid tDH Data Out Hold Time Ti (Note 8) 4 0.6 0.25 ms 4.7 1.3 0.5 ms 3.5 50 0.9 50 Noise Pulse Filtered at SCL and SDA Inputs 50 0.40 50 50 ms ns 50 ns tSU:WP WP Setup Time 0 0 0 ms tHD:WP WP Hold Time 2.5 2.5 1 ms tWR tPU (Notes 8, 9) Write Cycle Time 5 5 Power-up to Ready Mode 1 1 7. Test conditions according to “A.C. Test Conditions” table. 8. Tested initially and after a design or process change that affects this parameter. 9. tPU is the delay between the time VCC is stable and the device is ready to accept commands. www.onsemi.com 3 0.1 5 ms 1 ms CAT24C256 Power-On Reset (POR) The device will power up into Standby mode after VCC exceeds the POR trigger level and will power down into Reset mode when VCC drops below the POR trigger level. This bi−directional POR behavior protects the device against brown−out failure, following a temporary loss of power. Data transfer may be initiated only when the bus is not busy (see A.C. Characteristics). During data transfer, the SDA line must remain stable while the SCL line is HIGH. An SDA transition while SCL is HIGH will be interpreted as a START or STOP condition (Figure 2). START The START condition precedes all commands. It consists of a HIGH to LOW transition on SDA while SCL is HIGH. The START acts as a ‘wake−up’ call to all receivers. Absent a START, a Slave will not respond to commands. Pin Description SCL: The Serial Clock input pin accepts the Serial Clock signal generated by the Master. SDA: The Serial Data I/O pin receives input data and transmits data stored in EEPROM. In transmit mode, this pin is open drain. Data is acquired on the positive edge, and is delivered on the negative edge of SCL. A0, A1 and A2: The Address pins accept the device address. These pins have on−chip pull−down resistors. WP: The Write Protect input pin inhibits all write operations, when pulled HIGH. This pin has an on−chip pull−down resistor. STOP The STOP condition completes all commands. It consists of a LOW to HIGH transition on SDA while SCL is HIGH. The STOP starts the internal Write cycle (when following a Write command) or sends the Slave into standby mode (when following a Read command). Device Addressing The Master initiates data transfer by creating a START condition on the bus. The Master then broadcasts an 8−bit serial Slave address. The first 4 bits of the Slave address are set to 1010, for normal Read/Write operations (Figure 3). The next 3 bits, A2, A1 and A0, select one of 8 possible Slave devices. The last bit, R/W, specifies whether a Read (1) or Write (0) operation is to be performed. Functional Description The CAT24C256 supports the Inter−Integrated Circuit (I2C) Bus data transmission protocol, which defines a device that sends data to the bus as a transmitter and a device receiving data as a receiver. Data flow is controlled by a Master device, which generates the serial clock and all START and STOP conditions. The CAT24C256 acts as a Slave device. Master and Slave alternate as either transmitter or receiver. Up to 8 devices may be connected to the bus as determined by the device address inputs A0, A1, and A2. Acknowledge After processing the Slave address, the Slave responds with an acknowledge (ACK) by pulling down the SDA line during the 9th clock cycle (Figure 4). The Slave will also acknowledge the byte address and every data byte presented in Write mode. In Read mode the Slave shifts out a data byte, and then releases the SDA line during the 9th clock cycle. If the Master acknowledges the data, then the Slave continues transmitting. The Master terminates the session by not acknowledging the last data byte (NoACK) and by sending a STOP to the Slave. Bus timing is illustrated in Figure 5. I2C Bus Protocol The I2C bus consists of two ‘wires’, SCL and SDA. The two wires are connected to the VCC supply via pull−up resistors. Master and Slave devices connect to the 2−wire bus via their respective SCL and SDA pins. The transmitting device pulls down the SDA line to ‘transmit’ a ‘0’ and releases it to ‘transmit’ a ‘1’. www.onsemi.com 4 CAT24C256 SCL SDA START CONDITION STOP CONDITION Figure 2. Start/Stop Timing 1 0 1 0 A2 A1 A0 R/W DEVICE ADDRESS Figure 3. Slave Address Bits BUS RELEASE DELAY (TRANSMITTER) SCL FROM MASTER 1 BUS RELEASE DELAY (RECEIVER) 8 9 DATA OUTPUT FROM TRANSMITTER DATA OUTPUT FROM RECEIVER START ACK SETUP (≥ tSU:DAT) ACK DELAY (≤ tAA) Figure 4. Acknowledge Timing tHIGH tF tLOW tR tLOW SCL tSU:STA tHD:DAT tHD:STA tSU:DAT tSU:STO SDA IN tAA tDH SDA OUT Figure 5. Bus Timing www.onsemi.com 5 tBUF CAT24C256 WRITE OPERATIONS (within the selected page). The internal Write cycle starts immediately following the STOP. Byte Write In Byte Write mode the Master sends a START, followed by Slave address, two byte address and data to be written (Figure 6). The Slave acknowledges all 4 bytes, and the Master then follows up with a STOP, which in turn starts the internal Write operation (Figure 7). During internal Write, the Slave will not acknowledge any Read or Write request from the Master. Acknowledge Polling Page Write Hardware Write Protection The CAT24C256 contains 32,768 bytes of data, arranged in 512 pages of 64 bytes each. A two byte address word, following the Slave address, points to the first byte to be written. The most significant bit of the address word is ‘don’t care’, the next 9 bits identify the page and the last 6 bits identify the byte within the page. Up to 64 bytes can be written in one Write cycle (Figure 8). The internal byte address counter is automatically incremented after each data byte is loaded. If the Master transmits more than 64 data bytes, then earlier bytes will be overwritten by later bytes in a ‘wrap−around’ fashion With the WP pin held HIGH, the entire memory is protected against Write operations. If the WP pin is left floating or is grounded, it has no impact on the operation of the CAT24C256. The state of the WP pin is strobed on the last falling edge of SCL immediately preceding the first data byte (Figure 9). If the WP pin is HIGH during the strobe interval, the CAT24C256 will not acknowledge the data byte and the Write request will be rejected. Acknowledge polling can be used to determine if the CAT24C256 is busy writing or is ready to accept commands. Polling is implemented by interrogating the device with a ‘Selective Read’ command (see READ OPERATIONS). The CAT24C256 will not acknowledge the Slave address, as long as internal Write is in progress. Delivery State The CAT24C256 is shipped erased, i.e., all bytes are FFh. www.onsemi.com 6 CAT24C256 S T BUS ACTIVITY: A MASTER R T SLAVE ADDRESS BYTE ADDRESS A7 − A0 A15 − A8 SDA LINE S S T O P DATA P * A C K A C K * = Don’t Care Bit A C K A C K Figure 6. Byte Write Timing SCL SDA 8th Bit Byte n ACK tWR STOP CONDITION START CONDITION ADDRESS Figure 7. Write Cycle Timing S BUS T ACTIVITY: A MASTER R T BYTE ADDRESS A15 − A8 A7 − A0 SLAVE ADDRESS SDA LINE S DATA DATA n S T O P DATA n+63 P * * = Don’t Care Bit A C K A C K A C K A C K A C K Figure 8. Page Write Timing ADDRESS BYTE DATA BYTE 1 8 a7 a0 9 1 8 d7 d0 SCL SDA tSU:WP WP tHD:WP Figure 9. WP Timing www.onsemi.com 7 A C K A C K CAT24C256 READ OPERATIONS The address counter can be initialized by performing a ‘dummy’ Write operation (Figure 11). Here the START is followed by the Slave address (with the R/W bit set to ‘0’) and the desired two byte address. Instead of following up with data, the Master then issues a 2nd START, followed by the ‘Immediate Address Read’ sequence, as described earlier. Immediate Address Read In standby mode, the CAT24C256 internal address counter points to the data byte immediately following the last byte accessed by a previous operation. If that ‘previous’ byte was the last byte in memory, then the address counter will point to the 1st memory byte, etc. When, following a START, the CAT24C256 is presented with a Slave address containing a ‘1’ in the R/W bit position (Figure 10), it will acknowledge (ACK) in the 9th clock cycle, and will then transmit data being pointed at by the internal address counter. The Master can stop further transmission by issuing a NoACK, followed by a STOP condition. Sequential Read If the Master acknowledges the 1st data byte transmitted by the CAT24C256, then the device will continue transmitting as long as each data byte is acknowledged by the Master (Figure 12). If the end of memory is reached during sequential Read, then the address counter will ‘wrap−around’ to the beginning of memory, etc. Sequential Read works with either ‘Immediate Address Read’ or ‘Selective Read’, the only difference being the starting byte address. Selective Read The Read operation can also be started at an address different from the one stored in the internal address counter. S T BUS ACTIVITY: A MASTER R T S T O P SLAVE ADDRESS SDA LINE S P A C K SCL 8 SDA N O A C K DATA 9 8th Bit DATA OUT NO ACK STOP Figure 10. Immediate Address Read Timing S T BUS ACTIVITY: A MASTER R T S T A R T BYTE ADDRESS A15 − A8 A7 − A0 SLAVE ADDRESS SDA LINE S S T O P DATA P S * A C K * = Don’t Care Bit SLAVE ADDRESS A C K A C K N O A C K A C K Figure 11. Selective Read Timing BUS ACTIVITY: MASTER SLAVE ADDRESS DATA n DATA n+1 S T O P DATA n+x DATA n+2 P SDA LINE A C K A C K A C K Figure 12. Sequential Read Timing www.onsemi.com 8 A C K N O A C K CAT24C256 ORDERING INFORMATION Device Order Number Device Marking Package Type CAT24C256WI−GT3 24256E CAT24C256YI−GT3 CAT24C256HU4IGT3 Temperature Range Lead Finish Shipping† SOIC−8, JEDEC I = Industrial (−40°C to +85°C) NiPdAu Tape & Reel, 3,000 Units / Reel C56E TSSOP−8 I = Industrial (−40°C to +85°C) NiPdAu Tape & Reel, 3,000 Units / Reel C8U UDFN−8 I = Industrial (−40°C to +85°C) NiPdAu Tape & Reel, 3,000 Units / Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. 10. All packages are RoHS-compliant (Lead-free, Halogen-free). 11. The standard lead finish is NiPdAu. 12. For additional package and temperature options, please contact your nearest onsemi Sales office. 13. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. 14. For detailed information and a breakdown of device nomenclature and numbering systems, please see the onsemi Device Nomenclature document, TND310/D, available at www.onsemi.com onsemi is licensed by Philips Corporation to carry the I2C Bus Protocol. www.onsemi.com 9 MECHANICAL CASE OUTLINE PACKAGE DIMENSIONS UDFN8, 2x3 EXTENDED PAD CASE 517AZ ISSUE A 1 SCALE 2:1 PIN ONE REFERENCE 0.10 C B A D L1 ÇÇ ÇÇ ÇÇ DETAIL A ALTERNATE CONSTRUCTIONS E EXPOSED Cu DETAIL B A 0.10 C 0.08 C 1 D2 ÉÉ ÉÉ ÇÇ C MOLD CMPD ÉÉÉ ÉÉÉ ÇÇÇ A3 A1 ALTERNATE CONSTRUCTIONS 1 L 4 5 8X e XXXXX A WL Y W G BOTTOM VIEW b 0.10 M C A B 0.05 M C MILLIMETERS MIN MAX 0.45 0.55 0.00 0.05 0.13 REF 0.20 0.30 2.00 BSC 1.35 1.45 3.00 BSC 1.25 1.35 0.50 BSC 0.25 0.35 −−− 0.15 GENERIC MARKING DIAGRAM* SEATING PLANE E2 8 DIM A A1 A3 b D D2 E E2 e L L1 DETAIL B A3 A1 SIDE VIEW DETAIL A NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.15 AND 0.25MM FROM THE TERMINAL TIP. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. L L 0.10 C TOP VIEW NOTE 4 DATE 23 MAR 2015 XXXXX AWLYWG = Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package *This information is generic. Please refer to device data sheet for actual part marking. Pb−Free indicator, “G” or microdot “ G”, may or may not be present. NOTE 3 RECOMMENDED SOLDERING FOOTPRINT* 1.56 8X 0.68 1.45 3.40 1 8X 0.30 0.50 PITCH DIMENSIONS: MILLIMETERS *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. DOCUMENT NUMBER: DESCRIPTION: 98AON42552E Electronic versions are uncontrolled except when accessed directly from the Document Repository. Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red. UDFN8, 2X3 EXTENDED PAD PAGE 1 OF 1 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the rights of others. © Semiconductor Components Industries, LLC, 2019 www.onsemi.com MECHANICAL CASE OUTLINE PACKAGE DIMENSIONS SOIC 8, 150 mils CASE 751BD−01 ISSUE O E1 DATE 19 DEC 2008 E SYMBOL MIN A 1.35 1.75 A1 0.10 0.25 b 0.33 0.51 c 0.19 0.25 D 4.80 5.00 E 5.80 6.20 E1 3.80 4.00 MAX 1.27 BSC e PIN # 1 IDENTIFICATION NOM h 0.25 0.50 L 0.40 1.27 θ 0º 8º TOP VIEW D h A1 A θ c e b SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. DOCUMENT NUMBER: DESCRIPTION: 98AON34272E SOIC 8, 150 MILS Electronic versions are uncontrolled except when accessed directly from the Document Repository. Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red. PAGE 1 OF 1 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the rights of others. © Semiconductor Components Industries, LLC, 2019 www.onsemi.com MECHANICAL CASE OUTLINE PACKAGE DIMENSIONS TSSOP8, 4.4x3.0, 0.65P CASE 948AL ISSUE A DATE 20 MAY 2022 q q GENERIC MARKING DIAGRAM* XXX YWW AG XXX Y WW A G = Specific Device Code = Year = Work Week = Assembly Location = Pb−Free Package *This information is generic. Please refer to device data sheet for actual part marking. Pb−Free indicator, “G” or microdot “G”, may or may not be present. Some products may not follow the Generic Marking. DOCUMENT NUMBER: DESCRIPTION: 98AON34428E TSSOP8, 4.4X3.0, 0.65P Electronic versions are uncontrolled except when accessed directly from the Document Repository. Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red. 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