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HT1647A_11 Datasheet, PDF (5/19 Pages) Holtek Semiconductor Inc – 64x16 LCD Controller for I/O MCU
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PATENTED
HT1647A
Pad No. Pad Name I/O
Description
36
VDD
¾ Positive power supply for logic circuit
37
VLCD
I Power supply for LCD driver circuit
38
IRQ
O Time base or Watchdog Timer overflow flag, NMOS open drain output.
39, 40 BZ, BZ
O 2kHz or 4kHz frequency output pair (tristate output buffer)
41~44 T1~T4
I Not connected
45~60 COM0~COM15 O LCD common outputs
61~102,
1~22
SEG0~SEG63
O LCD segment outputs
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+5.5V
Input Voltage.............................VSS-0.3V to VDD+0.3V
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-25°C to 75°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 reliability.
D.C. Characteristics
Symbol
Parameter
VDD
Operating Voltage
IDD1
Operating Current
IDD2
Operating Current
IDD11
Operating Current
IDD22
Operating Current
ISTB
Standby Current
VIL
Input Low Voltage
VIH
Input High Voltage
IOL1
BZ, BZ, IRQ Sink Current
IOH1
BZ, BZ Source Current
Test Conditions
VDD
Conditions
¾
¾
3V No load/LCD ON
5V On-chip RC oscillator
3V No load/LCD ON
5V Crystal oscillator
3V No load/LCD OFF
5V On-chip RC oscillator
3V No load/LCD OFF
5V Crystal oscillator
3V No load,
5V Power down mode
3V
DB0~DB3, WR, CS, RD
5V
3V
DB0~DB3, WR, CS, RD
5V
3V VOL=0.3V
5V VOL=0.5V
3V VOH=2.7V
5V VOH=4.5V
Min.
2.7
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
0
0
2.4
4.0
1.2
3
-0.9
-2
Typ.
¾
150
250
135
200
15
50
2
3
¾
¾
¾
¾
¾
¾
2.5
6
-1.8
-4
Ta=25°C
Max. Unit
5.2
V
250 mA
370 mA
200
mA
300 mA
30
mA
70
mA
10
mA
10
mA
1
mA
2
mA
0.6
V
1.0
V
3
V
5
V
¾ mA
¾ mA
¾ mA
¾ mA
Rev. 1.40
5
April 29, 2011
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