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Features
? Low-voltage and Standard-voltage Operation
– 1.8 (V CC = 1.8V to 5.5V)
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Internally Organized as 32,768 x 8
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5.0V, 2.7V, 2.5V), and 400 kHz (1.8V) Compatibility
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Write Protect Pin for Hardware and Software Data Protection
64-byte Page Write Mode (Partial Page Writes Allowed)
Self-timed Write Cycle (5 ms Max)
High Reliability
– Endurance: One Million Write Cycles
– Data Retention: 40 Years
Lead-free/Halogen-free Devices Available
8-lead JEDEC PDIP, 8-lead JEDEC SOIC, EIAJ SOIC, 8-lead Ultra Thin Small Array
Package (SAP), 8-lead TSSOP, and 8-ball dBGA2 Packages
Die Sales: Wafer Form, Waffle Pack and Bumped Wafers
Two-wire Serial
EEPROM
256K (32,768 x 8)
AT24C256B
Description
The AT24C256B provides 262,144 bits of serial electrically erasable and programma-
ble read-only memory (EEPROM) organized as 32,768 words of 8 bits each. The
device’s cascadable feature allows up to eight devices to share a common two-wire
bus. The device is optimized for use in many industrial and commercial applications
where low-power and low-voltage operation are essential. The devices are available
in space-saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin SAP, 8-
lead TSSOP, and 8-ball dBGA2 packages. In addition, the entire family is available in
a 1.8V (1.8V to 5.5V) version.
Not
Recommended
for New Design
Pin Configurations
8-lead PDIP
8-lead SOIC
Pin Name
A0–A2
SDA
Function
Address Inputs
Serial Data
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
SCL
Serial Clock Input
8-lead dBGA2
8-lead TSSOP
WP
Write Protect
VCC
8
1
A0
GND
Ground
WP
SCL
SDA
7
6
5
2
3
4
A1
A2
GND
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
Bottom View
8-lead Ultra Thin SAP
VCC
WP
SCL
SDA
8
7
6
5
Bottom View
1
2
3
4
A0
A1
A2
GND
Rev. 5279C–SEEPR–3/09
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相关代理商/技术参数
AT24C256BY1-10YU-1.8 功能描述:电可擦除可编程只读存储器 8 MAP 1.8V - 8 MAP 1.8V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
AT24C256BY7-YH-T 制造商:Atmel Corporation 功能描述:EEPROM Serial-2Wire 256K-Bit 32K x 8 2.5V/3.3V/5V 8-Pin UTSAP EP T/R
AT24C256C-CUL-B 制造商:Atmel Corporation 功能描述:SERIAL EEPROM, 256K (32K X 8) - Bulk
AT24C256C-CUL-T 制造商:Atmel Corporation 功能描述:
AT24C256C-MAHL-T 功能描述:电可擦除可编程只读存储器 256K (32K X 8) 2-WI 1.8V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
AT24C256C-MAHL-T SL901 制造商:Atmel Corporation 功能描述:IC EEPROM 256KBIT 1MHZ 8UDFN
AT24C256C-SSHL-B 功能描述:电可擦除可编程只读存储器 256K (32K X 8), 2-WI 1.8V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
AT24C256C-SSHL-T 功能描述:电可擦除可编程只读存储器 256K (32K X 8), 2-WI 1.8V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8