Preliminary
HTG1390
D.C. Characteristics
Ta=25°C
Symbol
Parameter
VDD
IDD
Operating Voltage
Operating Current
ISTB
Standby Current
Test Conditions
VDD
Conditions
—
—
1.5V
No load,
fSYS=256kHz
1.5V
No load,
HALT mode
Min. Typ. Max. Unit
1.2 1.5 1.8 V
— 20 — µA
——
1
µA
VIL
VIH
IOL1
IOH1
IOL2
Input Low Voltage
1.5V
—
0 — 0.4 V
Input High Voltage
1.5V
—
1.0 — 1.5 V
Port A, BZ & BZ Output Sink
Current
1.5V
VDD=1.5V,
VOL=0.15V
95 100 — µA
Port A, BZ & BZ Output
Source Current
1.5V
VDD=1.5V,
VOH=1.35V
600 700 — µA
Segment Output Sink
Current
1.5V VLCD=3V, VOL=0.3V 100 150 — µA
IOH2
RPH
Segment Output Source
Current
Pull–high Resistance
1.5V VLCD=3V, VOH=2.7V –20 –40 — µA
1.5V PS, PP, RES
30 — 300 kΩ
A.C. Characteristics
Ta=25°C
Symbol
Parameter
fSYS
fLCD
tCOM
tCY
tRES
System Clock
LCD Clock
LCD Common Period
Cycle Time
Reset Pulse Width
fSOUND Sound Effect Clock
Test Conditions
VDD Conditions
1.5V R:36kΩ~2MΩ
1.5V
—
— 1/3 duty
— fSYS=256kHz
—
—
—
—
Min.
Typ.
Max. Unit
38
—
400 kHz
—
128*
— Hz
— (1/fLCD)×3 —
s
—
16
— µs
5
—
— ms
—
64 or 128
**
— kHz
Notes: * In general, fLCD is selected and optimized by Holtek depending upon fSYS and the operating
voltage.
** Only these two clocking signal frequencies are supported by the Holtek sound library.
6
17th Nov ’98