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參數(shù)資料
| 型號： | 74LCX541MSAX |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 2/10頁 |
| 文件大小： | 0K |
| 描述： | IC BUFF/DVR 8BIT LOW V 20SSOP |
| 標準包裝： | 2,000 |
| 系列： | 74LCX |
| 邏輯類型： | 緩沖器/線路驅(qū)動器，非反相 |
| 元件數(shù)： | 1 |
| 每個元件的位元數(shù)： | 8 |
| 輸出電流高，低： | 24mA，24mA |
| 電源電壓： | 2 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SSOP（0.209"，5.30mm 寬） |
| 供應商設(shè)備封裝： | 20-SSOP |
| 包裝： | 帶卷 (TR) |
AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER
DS41393B-page 12
Preliminary
2009-2012 Microchip Technology Inc.
3.2
4, 5, 8-Wire Sensor Selection
The desired sensor type of 4/8-wire or 5-wire is
hardware selectable using pin M2.
If 4/8-wire has been hardware-selected, then the
choice of 4-wire or 8-wire is software-selectable via the
TouchOptions Configuration register.
When 4/8-wire is hardware-selected, the controller
defaults to 4-wire operation. If 8-wire operation is
desired, then the TouchOptions Configuration register
must be changed.
3.3
4-Wire Touch Sensor Interface
Sensor tail pinouts can vary by manufacturer and part
number. Ensure that both sensor tail pins for one
sensor axis (layer) are connected to the controller’s
X-/X+ pins and the tail pins for the other sensor axis
(layer) are connected to the controller’s Y-/Y+ pins. The
controller’s X-/X+ and Y-/Y+ pin pairs do not need to
connect to a specific sensor axis. The orientation of
controller pins X- and X+ to the two sides of a given
sensor axis is not important. Likewise, the orientation of
controller pins Y- and Y+ to the two sides of the other
sensor axis is not important.
Connections to a 4-wire touch sensor are as follows
(See Figure 3-2).
FIGURE 3-2:
4-WIRE TOUCH SENSOR INTERFACE
Tie unused controller pins 5WSX-, SX+, SY-, and SY+
to VSS.
See
and
Section 3.9 “Noise Considerations” for important
information regarding the capacitance of the controller
schematic hardware.
TABLE 3-1:
4/8-WIRE vs. 5-WIRE
SELECTION
Type
M2 pin
4/8-wire
VSS
5-wire
VDD
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| 74LCX541MTC | 功能描述:緩沖器和線路驅(qū)動器 Octal Buff/Line Drv RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| 74LCX541MTC | 制造商:Fairchild Semiconductor Corporation 功能描述:Buffer Logic IC |
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