HT82K28A 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT82K28A Datasheet PDF : 16 Pages
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HT82K28A
Pin Description
Pin No.
Pin Name
1
OSC1
2, 4
VSS
3
VDD
5, 6
IO0~IO1
39, 40, 7~12 C0~C7
16~23, 28,
29, 13~15
24, 26, 27
33, 35
R0~R18
25, 34
NC
30
SCRL
31
NUM
32
CAP
37
CLOCK
38
DATA
I/O
Description
I System clock input
¾ Negative power supply, ground
¾ Positive power supply
O Customer defined optional output lines
I Keyboard matrix scanning input pins
O Keyboard matrix scanning output pins
¾ No connection
O LED pin
O LED pin
O LED pin
I/O Synchronous clock signal. Used to clock the transmission data
I/O Bidirectional data transmission line
Absolute Maximum Ratings
Supply Voltage .......................................4.75V to 5.25V
Storage Temperature ............................-55°C to 125°C
Input Voltage..............................VSS-0.3V to VDD+0.3V
Operating Temperature...............................0°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Electrical Characteristics
Symbol
Parameter
Test Conditions
VDD
Operating Voltage
¾
IDD
Operating Current
¾
Input Low Voltage (C0~C7)
¾
VIL
Input Low Voltage (DATA, CLOCK)
¾
VIH
Input High Voltage
¾
Output Low Voltage (R0~R18)
VOL
Output Low Voltage (DATA, CLOCK)
IOL=10mA
IOL=15mA
Internal Pull-high Resistance (C0~C7)
¾
Rph
Internal Pull-high Resistance (CLOCK, DATA)
¾
fSYS
System Clock
R=120kW
Min.
4.75
¾
0
0
3.5
¾
¾
5
2
¾
Ta=25°C
Typ. Max. Unit
5 5.25 V
2
5
mA
¾ 0.6
V
¾ 0.6
V
¾
VDD
V
¾ 0.5
V
¾ 0.5
V
10 20 kW
5
15 kW
4
¾ MHz
Rev. 1.30
2
June 27, 2002
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