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| 型號： | MCP4442-103E/ST |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 74/100頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DGTL POT 129TAPS 10K 14TSSOP |
| 標準包裝： | 96 |
| 接片： | 129 |
| 電阻（歐姆）： | 10k |
| 電路數(shù)： | 4 |
| 溫度系數(shù)： | 標準值 150 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設備位址） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 包裝： | 管件 |
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2010 Microchip Technology Inc.
DS22265A-page 75
MCP444X/446X
8.4
Using the General Call Command
The use of the General Call Address Increment,
Decrement, or Write commands is analogous to the
“Load” feature (LDAC pin) on some DACs (such as the
MCP4921). This allows all the devices to “Update” the
output level “at the same time”.
For some applications, the ability to update the wiper
values “at the same time” may be a requirement, since
they delay from writing to one wiper value and then the
next may cause application issues. A possible example
would be a “tuned” circuit that uses several MCP44XX
in rheostat configuration. As the system condition
changes (temperature, load, etc.) these devices need
to be changed (incremented/decremented) to adjust for
the system change. These changes will either be in the
same direction or in opposite directions. With the
Potentiometer device, the customer can either select
the PxB terminals (same direction) or the PxA
terminal(s) (opposite direction).
Figure 8-6 shows that the update of six devices takes
6*TI2CDLY time in “normal” operation, but only
1*TI2CDLY time in “General Call” operation.
cases, the single I2C bus configuration will be
adequate. For applications that do not want all the
MCP44XX devices to do General Call support or have
a conflict with General Call commands, the multiple I2C
bus configuration would be used.
FIGURE 8-5:
Typical Application I2C Bus
Configurations.
FIGURE 8-6:
Example Comparison of “Normal Operation” vs. “General Call Operation” Wiper
Updates.
Note:
The application system may need to
partition the I2C bus into multiple busses to
ensure that the MCP44XX General Call
commands do not conflict with the General
Call commands that the other I2C devices
may have defined. Also if only a portion of
the MCP44XX devices are to require this
synchronous operation, then the devices
that should not receive these commands
should be on the second I2C bus.
Single I2C Bus Configuration
Host
Controller
Device 1
Device 3
Device n
Device 2
Device 4
Multiple I2C Bus Configuration
Host
Controller
Device 1a Device 3a
Device na
Device 2a
Device 4a
Device 1b
Device 3b
Device nb
Device 2b
Device 4b
Bus b
Bus a
Device 1n Device 3n
Device nn
Device 2n
Device 4n
Bus n
Normal Operation
General Call Operation
INC
POT01
INC
POT02
INC
POT03
INC
POT04
INC
POT05
INC
POT06
TI2CDLY
TI2CDLY = Time from one I2C command completed to completing the next I2C command.
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
TI2CDLY
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| MCP4442-104E/ST | 功能描述:數(shù)字電位計 IC 100k I2C Quad Ch 7bt Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MCP4442-104E/ST | 制造商:Microchip Technology Inc 功能描述:; End To End Resistance:100kohm; Track T 制造商:Microchip Technology Inc 功能描述:IC, DIG POT, 100kohm, 129STEPS, QUAD, TSSOP-14 |
| MCP4442-503E/ST | 功能描述:數(shù)字電位計 IC 50k I2C Quad Ch 7bit Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MCP4442-503E/ST | 制造商:Microchip Technology Inc 功能描述:; End To End Resistance:50kohm; Track Ta 制造商:Microchip Technology Inc 功能描述:IC, DIG POT, 50kohm, 129STEPS, QUAD, TSSOP-14 |
| MCP4442T-103E/ST | 功能描述:數(shù)字電位計 IC 10k I2C Qd Ch 7bit Nonvolatile memory RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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