HT7470 Просмотр технического описания (PDF) - Holtek Semiconductor
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HT7470 Datasheet PDF : 7 Pages
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HT7470
Pin No. Pin Name I/O
Description
9
S0/BZ
10 S1/BZ
I/O S0, S1 are charge rate inputs.
I/O BZ, BZ are a buzzer driving pair.
11 DCHI
I Discharge input, active low. Discharge before charging, active low.
12 WARM
I Warm-up key, active low. Used only to warm up the battery.
13 LED2
O LED2 indicates the charge, discharge and battery status.
14 DCHO
O Discharge control output, active high.
15 CHGO
O Charge control output, active high.
16 SC
O A/D converter start conversion control output, active low.
Absolute Maximum Ratings
Supply Voltage ..............................–0.3V to 5.5V
Input Voltage................. VSS–0.3V to VDD+0.3V
Storage Temperature ................ –50°C to 125°C
Operating Temperature .............. –20°C to 70°C
Electrical Characteristics
Symbol
Parameter
VDD
IDD
VIL
VIH
IOL
IOH
IOL1
IOH1
Operating voltage
Operating current
Input low voltage
Input high voltage
LED1, LED2 output sink
current
LED1 output source current
CHGO, DCHO, BZ, BZ, SC
output sink current
CHGO, DCHO, BZ, BZ, SC,
LED2 output source current
RPH
Pull-high resistance
fSYS
System clock
Test condition
VDD Condition
—
—
5V
No load
fSYS=1MHz
5V
—
5V
—
5V VOL=0.5V
5V VOH=4.5V
5V VOL=0.5V
Min. Typ. Max. Unit
3.5
5
5.5 V
—
1.5
3
mA
VSS
— 0.2VDD V
0.8VDD — VDD V
2.5
—
— mA
–2.5 —
— mA
2.5
—
— mA
5V VOH=4.5V
–1.5 —
S0, S1, WARM
5V DCHI, RST, EOC, —
50
TC
5V ROSC=18KΩ
—
1
— mA
— KΩ
— MHz
2
25th Aug ’94
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