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HT6542B Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

Part # HT6542B
Description  Keyboard Controller with PS/2
PDF  7 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT6542B Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

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D.C. Characteristics
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VDD
Condition
VDD
Operating Voltage
—
–
4.75
5
5.25
V
IDD
Operating Current
5V
FOSC=8MHz
No load
—4
6
mA
VIL
Input Low Voltage
—
—
–0.5
—
0.8
V
VIH
Input High Voltage
—
—
2
—
VDD
V
VOL
P10~P16, KBCI, KBDI,
D0~D7, RC, A20, P22, P23,
KB-OBFO, MS-OBFO
Output Low Voltage
IOL=6mA
5V
VOL=0.5V
—
—
0.5
V
VOH
D0~D7, KB-OBFO, MS-OBFO,
KBCO, KBDO, A20, RC
Output High Voltage
IOH=0.3mA
5V
VOH=4.5V
4.5
—
—
V
RPH1
P10~P16, KBD-INH
Pull-High Resistance
—
—
10
20
30
ΚΩ
RPH2
KBCI, KBDI, CS, RD, A0,
WR Pull-High Resistance
—
—
30
50
70
ΚΩ
HT6542B
4
30th Nov ’95



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