参数资料
| 型号： | ISL22511WFB8Z |
| 厂商： | Intersil |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL PB 32TP LN LP 8-SOIC |
| 标准包装： | 980 |
| 系列： | XDCP™ |
| 接片： | 32 |
| 电阻（欧姆）： | 10k |
| 电路数： | 1 |
| 温度系数： | 标准值 ±80 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | 2 线按钮 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
10
FN6678.1
July 16, 2009
Power-Up and Down Requirements
There are no restrictions on the power-up or power-down
conditions of VCC and the voltages applied to the
potentiometer pins provided that VCC is always more
positive than or equal to VRH and VRL, i.e., VCC ≥ VRH,VRL.
The VCC ramp rate specification is always in effect.
Pin Descriptions
RH and RL
The RH and RL pins of the ISL22511 are equivalent to the
fixed terminals of a mechanical potentiometer. The minimum
voltage is VSS and the maximum is VCC. The terminology of
RH and RL references the relative position of the terminal in
relation to wiper movement direction.
RW
The RW pin is the wiper terminal of the potentiometer which
is equivalent to the movable terminal of a mechanical
potentiometer.
PU
The debounced PU input is used to increment the wiper
position. An on-chip pull-up holds the PU input HIGH. A
switch closure to ground or a LOW logic level will, after a
debounce time, move the wiper to the next adjacent higher
tap position.
PD
The debounced PD input is used to decrement the wiper
position. An on-chip pull-up holds the PD input HIGH. A
switch closure to ground or a LOW logic level will, after a
debounce time, move the wiper to the next adjacent lower
tap position.
ASE
The debounced ASE (AUTOSTORE enable) pin can be in
one of two states:
1. AUTOSTORE is enabled if ASE is held LOW during
power up.
2. AUTOSTORE is disabled if ASE is held HIGH during
power-up. A LOW to HIGH transition will initiate a manual
store operation. This is for the user who wishes to
connect a push button switch to this pin. For every valid
push, the ISL22511 will store the current wiper position to
the EEPROM.
Device Operation
There are three sections of the ISL22511: the input control,
counter and decode section; the EEPROM memory; and the
resistor array. The input control section operates just like an
up/down counter. The output of this counter is decoded to
turn on a single electronic switch, connecting a point on the
resistor array to the wiper output. Under the proper
conditions, the contents of the counter can be stored in
EEPROM memory and retained for future use. The resistor
array is comprised of 31 individual resistors connected in
series. At either end of the array and between each resistor
is an electronic switch that transfers the potential at that
point to the wiper.
The ISL22511 is designed to interface directly to two push
button switches for effectively moving the wiper up or down.
The PU and PD inputs increment or decrement a 5-bit
counter respectively. The output of this counter is decoded to
select one of the thirty-two wiper positions along the resistive
array. The wiper increment input, PU and the wiper
decrement input, PD are both connected to an internal
pull-up so that they normally remain HIGH. When pulled
LOW by an external push button switch or a logic LOW level
input, the wiper will be switched to the next adjacent tap
position.
Internal debounce circuitry prevents inadvertent switching of
the wiper position if PU or PD remain LOW for less than
15ms, typical. Each of the buttons can be pushed either
once for a single increment/decrement or continuously for a
multiple increments/decrements. The number of
increments/decrements of the wiper position depends on
how long the button is being pushed. When making a
continuous push, after the first second, the
increment/decrement speed increases. For the first second,
the device will be in the slow scan mode. Then, if the button
is held for longer than 1 second, the device will go into the
fast scan mode. As soon as the button is released, the
ISL22511 will return to a standby condition.
If two or more buttons are pressed simultaneously, all
commands are ignored upon release of ALL buttons, except
Shutdown Mode condition.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the last
position. That is, the counter does not wrap around when
clocked to either extreme.
AUTOSTORE
The value of the counter is stored in EEPROM memory after
2 seconds of no activity on PU or PD inputs while ASE is
enabled (held LOW). When power is restored, the content of
the memory is recalled and the counter resets to the last
value stored.
If AUTOSTORE is to be implemented, ASE is typically hard
wired to VSS. If ASE is held HIGH during power-up and then
taken LOW, the wiper will not respond to the PU or PD inputs
until ASE is brought HIGH and held HIGH.
Manual (Push Button) Store
When ASE is not enabled (held HIGH), a push button switch
may be used to pull ASE LOW for more than 15ms and
released to perform a manual store of the wiper position.
During memory write cycle all inputs will be ignored.
ISL22511
相关PDF资料 |
PDF描述 |
|---|---|
| DS1013-10 | IC DELAY LINE 10NS 14-DIP |
| VE-JWD-MZ-S | CONVERTER MOD DC/DC 85V 25W |
| DS1005S-100 | IC DELAY LINE 5TAP 100NS 16-SOIC |
| VE-JWB-MZ-S | CONVERTER MOD DC/DC 95V 25W |
| DS1013-20 | IC DELAY LINE 20NS 14-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL22511WFB8Z-TK | 功能描述:数字电位计 IC DCP 8LD RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22511WFRU10Z-TK | 功能描述:数字电位计 IC DCP 2 1 X 1 6 RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22512 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Single Push Button Controlled Potentiometer XDCP |
| ISL22512WFB8Z | 功能描述:数字电位计 IC DCP 8LD RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22512WFB8Z-TK | 功能描述:数字电位计 IC DCP 8LD RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。