AT24C256C-SSHL-T
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mfr | Microchip Technology |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Technology | EEPROM |
| Supplier Device Package | 8-SOIC |
| Access Time | 550 ns |
| Memory Size | 256Kbit |
| Memory Type | Non-Volatile |
| Voltage - Supply | 1.7V ~ 5.5V |
| Clock Frequency | 1 MHz |
| Memory Organization | 32K x 8 |
| Memory Format | EEPROM |
| Memory Interface | I²C |
| Write Cycle Time - Word, Page | 5ms |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | AT24C256C |
| REACH Status | REACH Unaffected |
| Standard Package | 4,000 |
| ECCN | EAR99 |
| HTSUS | 8542.32.0051 |
AT24C256C-SSHL-T EEPROM Memory IC 256Kbit I²C 1 MHz 550 ns 8-SOIC
The AT24C256C-SSHL-T is a Microchip Technology 256-Kbit (32,768 x 8) I2C-compatible serial EEPROM in an 8-lead SOIC package, supplied on tape-and-reel for automated assembly. Operating from 1.7 V to 5.5 V, it supports 100 kHz Standard mode, 400 kHz Fast mode, and 1 MHz Fast Mode Plus (FM+) bus speeds at 2.5 V-5.5 V, and integrates a 64-byte page write buffer, hardware write-protect pin, Schmitt-trigger filtered inputs, and self-timed write cycles within 5 ms maximum.
Key Features & Benefits
● 256 Kbit (32K x 8) Serial EEPROM Organization: Internally organized as 32,768 words of 8 bits each, structured as 512 pages of 64 bytes each with 15-bit random word addressing.
● Wide 1.7 V to 5.5 V Supply Range: Single-supply operation from 1.7 V low-voltage systems through standard 5 V rails, covering 1.8 V, 3.3 V, and 5 V designs.
● 1 MHz Fast Mode Plus (FM+) I2C Interface: Supports 100 kHz standard, 400 kHz fast, and 1 MHz FM+ modes (FM+ at 2.5 V-5.5 V), delivering fast data transfer with bidirectional protocol.
● 64-Byte Page Write with Partial Writes: Allows partial page writes and 5 ms maximum self-timed write cycles, simplifying firmware while accelerating data updates.
● Ultra-Low Power: 1 mA Read / 6 µA Standby: Active read current of 1.0 mA typical (2.0 mA max) at 5 V, and standby current of 1.0 µA at 1.7 V / 6.0 µA at 5.0 V, ideal for battery applications.
● ESD Protection > 4,000 V: Robust input protection exceeds 4 kV per human-body model.
Frequently Asked Questions
Q: What is the maximum I2C clock frequency?
A: 1 MHz Fast Mode Plus (FM+) operation is supported at VCC = 2.5 V to 5.5 V; at 1.7 V the maximum bus speed is 400 kHz Fast mode.
Q: Is the device 5 V tolerant at 3.3 V operation?
A: No. VCC must remain within 1.7 V-5.5 V; the I2C bus voltage levels track VCC, so the pull-up resistor should be tied to the same rail as VCC.
Recommended Alternative EEPROM Models
1. 24LC256-I/ST — The Microchip 256-Kbit I2C EEPROM in the same 8-pin SOIC-150mil package with 400 kHz bus and 64-byte page write, functionally pin-compatible in slower-speed applications.
2. AT24C256C-SSHM-T — The identical 256-Kbit device in a TSSOP-8 package for reduced-height board designs with the same 1 MHz FM+ performance.
3. CAT24C256 (onsemi) — The onsemi 256-Kbit I2C serial EEPROM with 64-byte page write buffer and equivalent 1.7 V-5.5 V operation.
