参数资料
| 型号： | AT25256B-SSHL-T |
| 厂商： | Atmel |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 256KBIT 20MHZ 8SOIC |
| 标准包装： | 1 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 256K (32K x 8) |
| 速度： | 5MHz，10MHz，20MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 剪切带 (CT) |
| 其它名称： | AT25256B-SSHL-TCT |
Atmel AT25128B/256B
Table 1-3.
AC Characteristics (Continued)
Applicable over recommended operating range from T A = – 40°C to + 85°C, V CC = As Specified,
CL = 1 TTL Gate and 30pF (unless otherwise noted)
Symbol
Parameter
Voltage
Min
Max
Units
4.5–5.5
0
25
t LZ
HOLD to Output Low Z
2.5–5.5
0
50
ns
1.8–5.5
4.5–5.5
0
100
25
t HZ
HOLD to Output High Z
2.5–5.5
50
ns
1.8–5.5
4.5–5.5
100
25
t DIS
Output Disable Time
2.5–5.5
50
ns
1.8–5.5
4.5–5.5
100
5
t WC
Write Cycle Time
2.5–5.5
5
ms
1.8–5.5
5
Endurance (1)
3.3V, 25°C, Page Mode
1M
Write Cycles
Notes:
1. This parameter is characterized and is not 100% tested. Contact Atmel for further information
2.
Serial Interface Description
MASTER: The device that generates the serial clock.
SLAVE: Because the serial clock pin (SCK) is always an input, the Atmel ? AT25128B/256B always operates as a
slave.
TRANSMITTER/RECEIVER: The AT25128B/256B has separate pins designated for data transmission (SO) and
reception (SI).
MSB: The Most Significant Bit (MSB) is the first bit transmitted and received.
SERIAL-OP CODE: After the device is selected with CS going low, the first byte will be received. This byte con-
tains the op-code that defines the operations to be performed.
INVALID OP-CODE: If an invalid op-code is received, no data will be shifted into th e AT25128B/256B, and the
serial output pin (SO) will remain in a high impedance state until the falling edge of CS is detected again. This will
reinitialize the serial communication.
CHIP SELECT: The AT25128B/256B is selected when the CS pin is low. When the device is not selected, data will
not be accepted via the SI pin, and the serial output pin (SO) will remain in a high impedance state.
HOLD: The HOLD pin is used in conjunction with the CS pin to select the AT25128B/256B. When the device is
selected and a serial sequence is underway, HOLD can be used to pause the serial communication with the mas-
ter device without resetting the serial sequence. To pause, the HOLD pin must be brought low while the 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 SI pin will be ignored while the SO pin is in the high impedance state.
5
8698C–SEEPR–8/11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT25256B-SSHL-T SL901 | 制造商:Atmel Corporation 功能描述:IC EEPROM 256KBIT 20MHZ 8SOIC |
| AT25256B-SSHL-T | 制造商:Atmel Corporation 功能描述:Serial EEPROM IC |
| AT25256B-XHL-B | 功能描述:电可擦除可编程只读存储器 256Kbit; SPI Bus High Spd; Mode 0 & 3 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 |
| AT25256B-XHL-T | 功能描述:电可擦除可编程只读存储器 256Kbit; SPI Bus High Spd; Mode 0 & 3 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 |
| AT25256B-XHL-T SL901 | 制造商:Atmel Corporation 功能描述:IC EEPROM 256KBIT 20MHZ 8TSSOP |
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