AT25080B-SSHL-B

AT25080B/AT25160B SPI Serial EEPROM 8 Kbits (1,024 x 8) and 16 Kbits (2,048 x 8) Features • • • • • • • • • • • • Serial Peripheral Interface (SPI) Compatible Supports SPI Modes 0 (0,0) and 3 (1,1): – Data sheet describes mode 0 operation Low-Voltage Operation: – 1.8V (VCC = 1.8V to 5.5V) Industrial Temperature Range: -40°C to +85°C 20 MHz Clock Rate (5V) 32‑Byte Page Mode Block Write Protection: – Protect 1/4, 1/2 or entire array Write-Protect (WP) Pin and Write Disable Instructions for Both Hardware and Software Data Protection Self-Timed Write Cycle within 5 ms Maximum High Reliability: – Endurance: 1,000,000 write cycles – Data retention: 100 years Green (Lead-free/Halide-free/RoHS Compliant) Package Options Die Sale Options: Wafer Form and Bumped Wafers Packages • 8-Lead SOIC, 8-Lead TSSOP, 8-Pad UDFN, 8-Pad XDFN and 8-Ball VFBGA © 2019 Microchip Technology Inc. Datasheet DS20006244A-page 1 AT25080B/AT25160B Table of Contents Features......................................................................................................................................................... 1 Packages........................................................................................................................................................1 1. Package Types (not to scale)..................................................................................................................4 2. Pin Description........................................................................................................................................ 5 2.1. 2.2. 2.3. 2.4. 2.5. 2.6. 2.7. 2.8. 3. Description.............................................................................................................................................. 7 3.1. 3.2. 4. Absolute Maximum Ratings..........................................................................................................9 DC and AC Operating Range.......................................................................................................9 DC Characteristics....................................................................................................................... 9 AC Characteristics......................................................................................................................10 SPI Synchronous Data Timimg.................................................................................................. 12 Electrical Specifications..............................................................................................................12 Device Operation.................................................................................................................................. 15 5.1. 5.2. 5.3. 5.4. 6. SPI Bus Master Connections to Serial EEPROMs.......................................................................7 Block Diagram.............................................................................................................................. 8 Electrical Characteristics.........................................................................................................................9 4.1. 4.2. 4.3. 4.4. 4.5. 4.6. 5. Chip Select (CS)...........................................................................................................................5 Serial Data Output (SO)............................................................................................................... 5 Write-Protect (WP)....................................................................................................................... 5 Ground (GND).............................................................................................................................. 5 Serial Data Input (SI)....................................................................................................................6 Serial Data Clock (SCK)...............................................................................................................6 Suspend Serial Input (HOLD).......................................................................................................6 Device Power Supply (VCC)......................................................................................................... 6 Interfacing the AT25080B/AT25160B on the SPI Bus................................................................ 15 Device Opcodes......................................................................................................................... 16 Hold Function............................................................................................................................. 16 Write Protection..........................................................................................................................17 Device Commands and Addressing......................................................................................................18 6.1. 6.2. STATUS Register Bit Definition and Function............................................................................ 18 Read STATUS Register (RDSR)..................................................................................................19 6.3. Write Enable (WREN) and Write Disable (WRDI)......................................................................... 19 6.4. Write STATUS Register (WRSR).................................................................................................. 20 7. Read Sequence.................................................................................................................................... 23 8. Write Sequence.....................................................................................................................................24 8.1. 8.2. 8.3. 9. Byte Write...................................................................................................................................24 Page Write..................................................................................................................................24 Polling Routine........................................................................................................................... 25 Packaging Information.......................................................................................................................... 26 © 2019 Microchip Technology Inc. Datasheet DS20006244A-page 2 AT25080B/AT25160B 9.1. Package Marking Information.....................................................................................................26 10. Revision History.................................................................................................................................... 37 The Microchip Website.................................................................................................................................38 Product Change Notification Service............................................................................................................38 Customer Support........................................................................................................................................ 38 Product Identification System.......................................................................................................................39 Microchip Devices Code Protection Feature................................................................................................ 39 Legal Notice................................................................................................................................................. 40 Trademarks.................................................................................................................................................. 40 Quality Management System....................................................................................................................... 41 Worldwide Sales and Service.......................................................................................................................42 © 2019 Microchip Technology Inc. Datasheet DS20006244A-page 3 AT25080B/AT25160B Package Types (not to scale) 1. Package Types (not to scale) 8-Lead SOIC/TSSOP (Top View) CS 1 8 Vcc SO 2 7 HOLD WP 3 6 SCK GND 4 5 SI 8-Ball VFBGA (Top View) 8-Pad UDFN/XDFN (Top View) CS 1 8 Vcc SO 2 7 HOLD WP 3 6 SCK GND 4 5 SI © 2019 Microchip Technology Inc. CS 1 8 Vcc SO 2 7 HOLD WP 3 6 SCK GND 4 5 SI Datasheet DS20006244A-page 4 AT25080B/AT25160B Pin Description 2. Pin Description The descriptions of the pins are listed in Table 2-1. Table 2-1. Pin Function Table Name 8-Lead SOIC 8-Lead TSSOP 8-Pad UDFN(1) 8-Pad XDFN 8-Ball VFBGA CS 1 1 1 1 1 Chip Select Function SO 2 2 2 2 2 Serial Data Output WP(2) 3 3 3 3 3 Write-Protect GND 4 4 4 4 4 Ground Serial Data Input SI 5 5 5 5 5 SCK HOLD(2) 6 6 6 6 6 Serial Data Clock 7 7 7 7 7 Suspends Serial Input VCC 8 8 8 8 8 Device Power Supply Note:  1. The exposed pad on this package can be connected to GND or left floating. 2. The Write-Protect (WP) and Hold (HOLD) pins should be driven high or low as appropriate. 2.1 Chip Select (CS) The AT25080B/AT25160B is selected when the Chip Select (CS) pin is low. When the device is not selected, data will not be accepted via the Serial Data Input (SI) pin, and the Serial Output (SO) pin will remain in a high‑impedance state. To ensure robust operation, the CS pin should follow VCC upon power-up. It is therefore recommended to connect CS to VCC using a pull-up resistor (less than or equal to 10 kΩ). After power-up, a low level on CS is required prior to any sequence being initiated. 2.2 Serial Data Output (SO) The Serial Data Output (SO) pin is used to transfer data out of the AT25080B/AT25160B. During a read sequence, data is shifted out on this pin after the falling edge of the Serial Data Clock (SCK). 2.3 Write-Protect (WP) The Write-Protect (WP) pin will allow normal read/write operations when held high. When the WP pin is brought low and the WPEN bit is set to a logic ‘1’, all write operations to the STATUS register are inhibited. WP going low while CS is still low will interrupt a write operation to the STATUS register. If the internal write cycle has already been initiated, WP going low will have no effect on any write operation to the STATUS register. The WP pin function is blocked when the WPEN bit in the STATUS register is set to a logic ‘0’. This will allow the user to install the AT25080B/AT25160B in a system with the WP pin tied to ground and still be able to write to the STATUS register. All WP pin functions are enabled when the WPEN bit is set to a logic ‘1’. 2.4 Ground (GND) The ground reference for the Device Power Supply (VCC). The Ground (GND) pin should be connected to the system ground. © 2019 Microchip Technology Inc. Datasheet DS20006244A-page 5 AT25080B/AT25160B Pin Description 2.5 Serial Data Input (SI) The Serial Data Input (SI) pin is used to transfer data into the device. It receives instructions, addresses and data. Data is latched on the rising edge of the Serial Data Clock (SCK). 2.6 Serial Data Clock (SCK) The Serial Data Clock (SCK) pin is used to synchronize the communication between a master and the AT25080B/ AT25160B. Instructions, addresses or data present on the Serial Data Input (SI) pin is latched in on the rising edge of SCK, while output on the Serial Data Output (SO) pin is clocked out on the falling edge of SCK. 2.7 Suspend Serial Input (HOLD) The Suspend Serial Input (HOLD) pin is used in conjunction with the Chip Select (CS) pin to pause the AT25080B/ AT25160B. When the device is selected and a serial sequence is underway, HOLD can be used to pause the serial communication with the master device without resetting the serial sequence. To pause, the HOLD pin must be brought low while the Serial Data Clock (SCK) pin is low. To resume serial communication, the HOLD pin is brought high while the SCK pin is low (SCK may still toggle during HOLD). Inputs to the Serial Data Input (SI) pin will be ignored while the Serial Data Output (SO) pin will be in the high‑impedance state. 2.8 Device Power Supply (VCC) The Device Power Supply (VCC) pin is used to supply the source voltage to the device. Operations at invalid VCC voltages may produce spurious results and should not be attempted. © 2019 Microchip Technology Inc. Datasheet DS20006244A-page 6 AT25080B/AT25160B Description 3. Description The AT25080B/AT25160B provides 8,192/16,384 bits of Serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 1,024/2,048 words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low‑power and low‑voltage operation are essential. The device is available in space-saving 8‑lead SOIC, 8‑lead TSSOP, 8‑pad UDFN, 8-pad XDFN and 8-ball VFBGA packages. All packages operate from 1.8V to 5.5V. 3.1 SPI Bus Master Connections to Serial EEPROMs SPI Master: Microcontroller Data Clock (SCK) Data Output (SO) Data Input (SI) SI CS3 CS2 CS1 CS0 © 2019 Microchip Technology Inc. SO SCK SI SO SCK SI SO SCK SI SO SCK Slave 0 AT25XXX Slave 1 AT25XXX Slave 2 AT25XXX Slave 3 AT25XXX CS CS CS CS Datasheet DS20006244A-page 7 AT25080B/AT25160B Description Block Diagram Memory System Control Module CS High-Voltage Generation Circuit Power-on Reset Generator VCC Pause Operation Control HOLD Register Bank: STATUS Register SO EEPROM Array 1 page Row Decoder 3.2 Address Register and Counter Column Decoder WP SCK Data Register Data Output Buffer GND SI Write Protection Control © 2019 Microchip Technology Inc. Datasheet DS20006244A-page 8 AT25080B/AT25160B Electrical Characteristics 4. Electrical Characteristics 4.1 Absolute Maximum Ratings Operating temperature -55°C to +125°C Storage temperature -65°C to +150°C Voltage on any pin with respect to ground -1.0V to +7.0V VCC 6.25V DC output current 5.0 mA ESD protection > 2 kV Note:  Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 4.2 DC and AC Operating Range Table 4-1. DC and AC Operating Range AT25080B/AT25160B 4.3 Operating Temperature (Case) Industrial Temperature Range -40°C to +85°C VCC Power Supply Low-Voltage Grade 1.8V to 5.5V DC Characteristics Table 4-2. DC Characteristics(1) Parameter Symbol Minimum Typical Maximum Units Supply Voltage VCC1 1.8 — 5.5 V Supply Voltage VCC2 2.5 — 5.5 V Supply Voltage VCC3 4.5 — 5.5 V Supply Current ICC1 — 7.5 10.0 mA VCC = 5.0V at 20 MHz, SO = Open, Read Supply Current ICC2 — 4.0 10.0 mA VCC = 5.0V at 20 MHz, SO = Open, Read, Write Supply Current ICC3 — 4.0 6.0 mA VCC = 5.0V at 5 MHz, SO = Open, Read, Write Standby Current ISB1 —