PDF《A24C256》

? AiT Semiconductor Inc.

www.ait-ic.com A24C256 TWO-WIRE SERIAL EEPROM 256K (32768 X 8) REV1.2 - MAY

2009 RELEASED, FEB

2012 RELEASED - -

1 - ? DESCRIPTION FEATURES A24C256 provides 262,144 bits of serial electrically erasable and programmable read-only memory (EEPROM) organized as 32,768 words of

8 bits each. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operations are essential. The A24C256 is available SOP8 and TSSOP8 Package. ? Two-Wire Serial Interface ? VCC=1.8V To 5.5V ? Bi-Directional Data Transfer Protocol ? Internal Organized A24C256, 32,768 X

8 (256K bits)? ? ? 400KHz (1.8V, 2.7V &

5V) Compatibility ? 64-byte Page Write Mode ? Partial Page Writes Allowed ? Self-Timed Write Cycle (5ms Max) ? High-Reliability ?

1 Million Write Cycles guaranteed ? Data Retention >

100 Years ? Operating Temperature: -40oC to +85oC ? Available in SOP8 and TSSOP8 Package? ORDERING INFORMATION Package Type Part Number SOP8 M8 A24C256M8R A24C256M8U A24C256M8VR A24C256M8VU TSSOP8 TMX8 A24C256TMX8R A24C256TMX8U A24C256TMX8VR A24C256TMX8VU Note R: Tape &

Reel U: Tube V: Halogen free Package AiT provides all RoHS products, suffix V means Halogen free Package ? AiT Semiconductor Inc. www.ait-ic.com A24C256 TWO-WIRE SERIAL EEPROM 256K (32768 X 8) REV1.2 - MAY

2009 RELEASED, FEB

2012 RELEASED - -

2 - ? ? PIN DESCIPTION Top View ? Top View Pin # Symbol Type Functions SOP8 TSSOP8

1 1 A0 I Address Input

2 2 A1 I Address Input

3 3 NC NC No Connection

4 4 GND P Ground

5 5 SDA I/O &

Open-drain Serial Data

6 6 SCL I Serial Clock Input

7 7 WP I Write Protect

8 8 VCC P Power Supply ? AiT Semiconductor Inc. www.ait-ic.com A24C256 TWO-WIRE SERIAL EEPROM 256K (32768 X 8) REV1.2 - MAY

2009 RELEASED, FEB

2012 RELEASED - -

3 - ? ABSOLUTE MAXIMUM RATINGS DC Supply Voltage -0.3V ~ +6.5V Input/ Output Voltage GND-0.3V ~ VCC +0.3V Operating Ambient Temperature -40oC ~ +85oC Storage Temperature -55oC ~ +150oC Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to this device. These are stress ratings only. Functional operation of this device at these or any other condition above those indicated in the operational sections of this specification is not implied or intended. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability. PIN CAPACITANCE TA=25oC, f=1.0MHz, VCC=+1.8V PARAMETER SYMBOL MAX UNIT CONDITION Input /Output Capacitance (SDA) CI/O

8 pF VI/O=0V Input Capacitance (A0, A1, SCL) CIN

6 pF VIN=0V ? AiT Semiconductor Inc. www.ait-ic.com A24C256 TWO-WIRE SERIAL EEPROM 256K (32768 X 8) REV1.2 - MAY

2009 RELEASED, FEB

2012 RELEASED - -

4 - ? DC ELECTRICAL CHARACTERISTICS TA=-40oC to +85oC, VCC=+1.8V to +5.5V (Unless otherwise specified.) Parameter Symbol Condition MIN TYP MAX Unit Supply Voltage VCC1 1.8 5.5 V Supply Voltage? VCC2? 2.5 5.5? V Supply Voltage? VCC3? 2.7 5.5? V Supply Voltage? VCC4? 4.5 5.5? V Supply Current VCC=5.0V ICC1 Read at 400KHz 0.4 1.0 mA Supply Current VCC=5.0V ? ICC2 Write at 400KHz 2.0 3.0 mA Supply Current VCC=1.8V? ICC1 VIN=VCC or VSS 0.6 1.0 uA Supply Current VCC=2.5V? ICC2 VIN=VCC or VSS 1.0 2.0 uA Supply Current VCC=2.7V? ICC3? VIN=VCC or VSS 1.0? 2.0 uA Supply Current VCC=5.0V? ICC4? VIN=VCC or VSS 1.0? 5.0 uA Input Leakage Current ILI VIN=VCC or VSS 0.10 3.0 uA Output Leakage Current ILO VOUT= VCC or VSS 0.05 3.0 uA Input Low Level VIL -0.6 VCC x 0.3 V Input High Level VIH VCC x0.7 VCC+0.5 V Output Low Level VCC=5.0V VOL3 IOL=3.0mA 0.4 V Output Low Level Vcc=3.0V VOL2 IOL=2.1mA 0.4 V Output Low Level Vcc=1.8V VOL1 IOL=0.15mA 0.2 V ? AiT Semiconductor Inc. www.ait-ic.com A24C256 TWO-WIRE SERIAL EEPROM 256K (32768 X 8) REV1.2 - MAY