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參數(shù)資料
| 型號： | AT24C256CW-SH-B |
| 廠商： | ATMEL CORP |
| 元件分類： | PROM |
| 英文描述： | 32K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8 |
| 封裝： | 0.20 INCH, LEAD AND HALOGEN FREE, PLASTIC, EIAJ, SOIC-8 |
| 文件頁數(shù)： | 23/23頁 |
| 文件大?。?/td> | 412K |
| 代理商： | AT24C256CW-SH-B |
AT24C256C
9
8568A–SEEPR–11/08
4.
Device Addressing
The 256K EEPROM requires an 8-bit device address word following a start condition to enable the chip for a read or
write operation (refer to Figure 8). The device address word consists of a mandatory “1”, “0” sequence for the first four
most significant bits as shown. This is common to all two-wire EEPROM devices.
Figure 8.
Device Addressing
1
0
1
0
A2
A1
A0
R/W
MSB
LSB
The next three bits are the A2, A1, A0 device address bits to allow as many as eight devices on the same bus. These
bits must compare to their corresponding hardwired input pins. The A2, A1, and A0 pins use an internal proprietary
circuit that biases them to a logic low condition if the pins are allowed to float.
The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if this bit is high,
and a write operation is initiated if this bit is low.
Upon a compare of the device address, the EEPROM will output a “0”. If a compare is not made, the device will return
to a standby state.
DATA SECURITY: The AT24C256C has a hardware data protection scheme that allows the user to write protect the
whole memory when the WP pin is at V
CC.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AT24C256C-XHLAU-B | 制造商:Atmel Corporation 功能描述:SERIAL EEPROM, 256K (32K X 8), 2-WI - 8 TSSOP, PB/HALO FREE - Bulk |
| AT24C256C-XHL-B | 功能描述:電可擦除可編程只讀存儲器 256K (32K X 8), 2-WI 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| AT24C256C-XHL-T | 功能描述:電可擦除可編程只讀存儲器 256K (32K X 8), 2-WI 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| AT24C256C-XPD-T | 制造商:Atmel Corporation 功能描述:SERIAL EEPROM, 256K (32K X 8) - Tape and Reel |
| AT24C256N-10SC | 功能描述:IC EEPROM 256KBIT 1MHZ 8SOIC 制造商:microchip technology 系列:- 包裝:管件 零件狀態(tài):停產(chǎn) 存儲器類型:非易失 存儲器格式:EEPROM 技術:EEPROM 存儲容量:256Kb （32K x 8） 時鐘頻率:1MHz 寫周期時間 - 字，頁:10ms 訪問時間:550ns 存儲器接口:I2C 電壓 - 電源:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C（TA） 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商器件封裝:8-SOIC 基本零件編號:AT24C256 標準包裝:100 |
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