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參數(shù)資料
| 型號： | PCA8550PW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | NONVOLATILE 5-BIT REGISTER WITH I2C INTERFACE |
| 中文描述： | 非易失5位寄存器，帶有I2C接口 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大小： | 87K |
| 代理商： | PCA8550PW |
Philips Semiconductors
Product specification
PCA8550
4-bit multiplexed/1-bit latched 5-bit I
2
C EEPROM
2
1998 Sep 29
853-2015 20105
FEATURES
4-bit 2-to-1 multiplexer, 1-bit latch
5-bit internal non-volatile register
Override input forces all outputs to logic 0
Internal non-volatile register write/readable via I
2
C bus
Write-protect pin enables/disables I
2
C writes to register
2.5V multiplexed outputs
3.3V non-multiplexed output (latched)
5V tolerant inputs
Useful for ’jumperless’ configuration of PC motherboards
Designed for use in Pentium Pro/Pentium II
systems
Pentium II is a registered trademark of Intel Corporation
DESCRIPTION
The primary function of the 4-bit 2-to-1 I
2
C multiplexer is to select
either a 4-bit input or data from a non-volatile register and drive this
value onto the output pins. One additional non-multiplexed register
output is also provided. The non-multiplexed output is latched to
prevent output value changes during I
2
C writes to the non-volatile
register. A write protect input is provided to enable/disable the ability
to write to the non-volatile register. An ‘‘override” input feature forces
all outputs to logic 0.
PIN CONFIGURATION
I2
C SCL
I
2
C SDA
OVERRIDE#
MUX_IN A
GND
V
CC
WP
NON_MUXED_OUT
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
MUX_IN B
MUX_IN C
MUX_IN D
MUX_SELECT
MUX_OUT A
MUX_OUT B
MUX_OUT C
MUX_OUT D
SW00216
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
DRAWING NUMBER
16-Pin Plastic SO
0
°
C to +70
°
C
PCA8550D
PCA8550D
SOT109-1
16-Pin Plastic SSOP
0
°
C to +70
°
C
PCA8550DB
PCA8550DB
SOT338-1
16-Pin Plastic TSSOP
0
°
C to +70
°
C
PCA8550PW
PCA8550PW DH
SOT403-1
FUNCTIONAL DESCRIPTION
When the MUX_SELECT signal is logic 0, the multiplexer will select
the data from the non-volatile register to drive on the MUX_OUT
pins. When the MUX_SELECT signal is logic 1, the multiplexer will
select the MUX_IN lines to drive on the MUX_OUT pins. The
MUX_SELECT signal is also used to latch the NON_MUXED_OUT
signal which outputs data from the non-volatile register. The
NON_MUXED_OUT signal latch is transparent when MUX_SELECT
is in a logic 0 state, and will latch data when MUX_SELECT is in a
logic 1 state. When the active-LOW OVERRIDE# signal is set to
logic 0 and the MUX_SELECT signal is at a logic 0, all outputs will
be driven to logic 0. This information is summarized in Table 1.
The write protect (WP) input is used to control the ability to write the
contents of the 5-bit non-volatile register. If the WP signal is logic 0,
the I
2
C bus will be able to write the contents of the non-volatile
register. If the WP signal is logic 1, data will not be allowed to be
written into the non-volatile register.
The factory default for the contents of the non-volatile register are all
logic 0. These stored values can be read or written using the I
2
C
bus (described in the next section).
The OVERRIDE#, WP, MUX_IN, and MUX_SELECT signals have
internal pullup resistors. See the DC and AC Characteristics for
hysteresis and signal spike suppression figures.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA8550PW,112 | 功能描述:寄存器 4-BIT 1-OF-2 I2C RoHS:否 制造商:NXP Semiconductors 邏輯類型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時鐘頻率:36 MHz 傳播延遲時間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
| PCA8550PW,118 | 功能描述:寄存器 4-BIT 1-OF-2 I2C MULTIPLEXER RoHS:否 制造商:NXP Semiconductors 邏輯類型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時鐘頻率:36 MHz 傳播延遲時間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
| PCA8550PW/DG,118 | 功能描述:寄存器 4-BIT 1-OF-2 I2C RoHS:否 制造商:NXP Semiconductors 邏輯類型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時鐘頻率:36 MHz 傳播延遲時間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
| PCA8550PW/DG-T | 功能描述:寄存器 4-BIT 1-OF-2 I2C MULTIPLEXER RoHS:否 制造商:NXP Semiconductors 邏輯類型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時鐘頻率:36 MHz 傳播延遲時間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
| PCA8550PW112 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
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