HT7500 Ver la hoja de datos (PDF) - Holtek Semiconductor
Número de pieza
componentes Descripción
Lista de partido
HT7500 Datasheet PDF : 7 Pages
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HT7500
Pad Description
Pad No. Pad Name
1
LOWC
2
VSS
3
SC
4
RF
5
RS
6
VDD
7
PSW
8
TEST2
9
10
11
12
13
14~16
17~19
20~22
23~25
26
27
28
29
30
31
32
33
CLFH
OSCI
OSCO
BZ1
BZ2
COM1~COM3
SA1~SA3
SB1~SB3
SC1~SC3
SD1
VEE
CAP
C512
TV
TEST1
TIM
TS816
I/O
Function
B For the supply voltage detector, open the pin when not in use.
¾ Negative power supply, GND
B Common point, NMOS open drain
O Connect reference resistor, PMOS open drain
O Connect sensor resistor, PMOS open drain
¾ Positive power supply
I Pull-low input pin, push switch to turn power on or off
I
Pull-low test pin, for production test, floating LCD displays the real time value,
when connected to VDD, LCD displays the highest value.
I Floating for °C, connect to VDD for °F
I For system oscillator in
O For system oscillator out
O Buzzer output 1
O Buzzer output 2
O LCD backplane drive, 3-level voltage out
O LCD segment drive
O LCD segment drive
O LCD segment drive
O LCD segment drive
O Generate negative voltage (-1.5V)
O For negative voltage, NMOS output
O For negative voltage, inverter output
B Test pin for IC
I Test pin for IC
I Test pin for IC
I Test pin for IC
Absolute Maximum Ratings
Supply voltage...............................................0V to 2.0V
Input voltage ..............................VSS-0.5V to VDD+0.5V
Operation Temperature........................-2.0°C to +75°C
Storage Temperature ..........................-55°C to +125°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.
Rev. 1.10
3
November 27, 2001
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