参数资料
| 型号： | 25AA080/SN |
| 厂商： | Microchip Technology |
| 文件页数： | 6/22页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 8KBIT 1MHZ 8SOIC |
| 标准包装： | 100 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 8K (1K x 8) |
| 速度： | 1MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
| 产品目录页面： | 1448 (CN2011-ZH PDF) |
25AA080/25LC080/25C080
2.0
PIN DESCRIPTIONS
2.4
Serial Input (SI)
The descriptions of the pins are listed in Table 2-1.
The SI pin is used to transfer data into the device. It
receives instructions, addresses and data. Data is
TABLE 2-1:
PIN FUNCTION TABLE
latched on the rising edge of the serial clock.
Name
PDIP
SOIC
Function
2.5
Serial Clock (SCK)
CS
SO
WP
Vss
SI
1
2
3
4
5
1
2
3
4
5
Chip Select Input
Serial Data Output
Write-Protect Pin
Ground
Serial Data Input
The SCK is used to synchronize the communication
between a master and the 25XX080. Instructions,
addresses or data present on the SI pin are latched on
the rising edge of the clock input, while data on the SO
pin is updated after the falling edge of the clock input.
SCK
6
6
Serial Clock Input
2.6
Hold (HOLD)
HOLD
Vcc
7
8
7
8
Hold Input
Supply Voltage
The HOLD pin is used to suspend transmission to the
25XX080 while in the middle of a serial sequence
without having to retransmit the entire sequence again.
2.1
Chip Select (CS)
It must be held high any time this function is not being
A low level on this pin selects the device. A high level
deselects the device and forces it into Standby mode.
However, a programming cycle which is already
initiated or in progress will be completed, regardless of
the CS input signal. If CS is brought high during a
program cycle, the device will go into Standby mode as
soon as the programming cycle is complete. When the
device is deselected, SO goes to the high-impedance
state, allowing multiple parts to share the same SPI
bus. A low-to-high transition on CS after a valid write
sequence initiates an internal write cycle. After power-
up, a low level on CS is required prior to any sequence
being initiated.
used. Once the device is selected and a serial
sequence is underway, the HOLD pin may be pulled
low to pause further serial communication without
resetting the serial sequence. The HOLD pin must be
brought low while SCK is low, otherwise the HOLD
function will not be invoked until the next SCK high-to-
low transition. The 25XX080 must remain selected
during this sequence. The SI, SCK and SO pins are in
a high-impedance state during the time the device is
paused and transitions on these pins will be ignored. To
resume serial communication, HOLD must be brought
high while the SCK pin is low, otherwise serial commu-
nication will not resume. Lowering the HOLD line at any
time will tri-state the SO line.
2.2
Serial Output (SO)
The SO pin is used to transfer data out of the 25XX080.
During a read cycle, data is shifted out on this pin after
the falling edge of the serial clock.
2.3
Write-Protect (WP)
This pin is used in conjunction with the WPEN bit in the
Status register to prohibit writes to the nonvolatile bits
in the Status register. When WP is low and WPEN is
high, writing to the nonvolatile bits in the Status register
is disabled. All other operations function normally.
When WP is high, all functions, including writes to the
nonvolatile bits in the Status register operate normally.
If the WPEN bit is set, WP low during a Status register
write sequence will disable writing to the Status
register. If an internal write cycle has already begun,
WP going low will have no effect on the write.
The WP pin function is blocked when the WPEN bit in
the Status register is low. This allows the user to install
the 25XX080 in a system with WP pin grounded and
still be able to write to the Status register. The WP pin
functions will be enabled when the WPEN bit is set
high.
DS21230D-page 6
? 2004 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 25AA080T/SN | 功能描述:电可擦除可编程只读存储器 1kx8 - 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 |
| 25AA080T-E/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI TM Bus Serial EEPROM |
| 25AA080T-E/SN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI TM Bus Serial EEPROM |
| 25AA080T-I/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI TM Bus Serial EEPROM |
| 25AA080T-I/SN | 功能描述:电可擦除可编程只读存储器 1kx8 - 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 |
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