參數(shù)資料
型號(hào)： PCF85176T
廠商： NXP SEMICONDUCTORS
元件分類： 顯示驅(qū)動(dòng)器
英文描述： Universal LCD driver for low multiplex rates
中文描述： LIQUID CRYSTAL DISPLAY DRIVER, PDSO56
封裝： 6.10 MM, PLASTIC, MO-153, SOT364-1, TSSOP-56
文件頁(yè)數(shù)： 36/47頁(yè)
文件大小： 405K
代理商： PCF85176T
PCF85176
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 27 June 2011
36 of 47
NXP Semiconductors
PCF85176
Universal LCD driver for low multiplex rates
The SYNC line is provided to maintain the correct synchronization between all cascaded
PCF85176. Synchronization is guaranteed after a power-on reset. The only time that
SYNC is likely to be needed is if synchronization is accidentally lost (e.g. by noise in
adverse electrical environments or by defining a multiplex drive mode when PCF85176
with different SA0 levels are cascaded).
SYNC is organized as an input/output pin. The output selection is realized as an
open-drain driver with an internal pull-up resistor. A PCF85176 asserts the SYNC line at
the onset of its last active backplane signal and monitors the SYNC line at all other times.
If synchronization in the cascade is lost, it is restored by the first PCF85176 to assert
SYNC. The timing relationship between the backplane waveforms and the SYNC signal
for the various drive modes of the PCF85176 are shown in
Figure 26
.
The contact resistance between the SYNC on each cascaded device must be controlled.
If the resistance is too high, the device is not able to synchronize properly; this is
particularly applicable to chip-on-glass applications. The maximum SYNC contact
resistance allowed for the number of devices in cascade is given in
Table 21
.
(1) Is master (OSC connected to V
SS
).
(2) Is slave (OSC connected to V
DD
).
Fig 25. Cascaded PCF85176 configuration
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
SDA
SCL
CLK
OSC
SYNC
40 segment drives
4 backplanes
40 segment drives
LCD PANEL
PCF85176
(1)
A0
A1
A2
SA0
V
SS
V
SS
V
SS
VDD
V
DD
VLCD
V
LCD
V
DD
V
LCD
013aaa297
SDA
SCL
SYNC
CLK
OSC
BP0 to BP3
(open-circuit)
A0
A1
A2
SA0
PCF85176
(2)
BP0 to BP3
R
t
r
2C
b
≤
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PCF85176T/1,118 功能描述:LCD 驅(qū)動(dòng)器 40 SGMT 2640Hz RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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