ht82k74e Holtek Semiconductor Inc., ht82k74e Datasheet - Page 4

• Manufacturer Part Number: ht82k74e
• Description: 27mhz Keyboard/ Mouse Tx 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

D.C. Characteristics
A.C. Characteristics
Note: t
Rev. 1.00
V
V
I
I
V
V
V
V
V
I
I
R
BAT-in
f
t
t
t
t
t
t
Symbol
DD
STB
OL1
OH1
SYS
RCSYS
WDT
SST
OSTSETUP
LVR
RES
Symbol
DD
OUT
IL1
IH1
IL2
IH2
LVR
PH1
SYS
=1/f
Operating Voltage
DC-DC Operating Voltage
Operating Current (Crystal OSC)
Standby Current
Input Low Voltage for I/O
(Schmitt Trigger)
Input High Voltage for I/O
(Schmitt Trigger)
Input Low Voltage (RES)
Input High Voltage (RES)
Low Voltage Reset
Other I/O Pins Sink Current
Other I/O Pins Source Current
Other Pins Internal Pull-high
Resistance
Input Voltage
System Clock
Watchdog OSC Period
Watchdog Time-out Period with
6-stage Prescaler
System Start-up Timer Period
Crystal Setup
Low Voltage Width to Reset
External Reset Low Pulse Width
SYS
Parameter
Parameter
V
V
3V No load, f
3V V
3V V
3V
3V
3V WDTS=1
DD
DD
f
No load, system HALT
WDT disable, LVR disable
SYS
OL
OH
Test Conditions
Test Conditions
=0.1V
=27MHz
=0.9V
4
Conditions
Conditions
SYS
DD
Others
DD
= 27MHz
HT82K74E/HT82K74EE
0.7V
0.9V
Min.
Min.
0.25
2.0
2.8
3.5
10
10
2.5
0
0
4
2
DD
DD
1024
Typ.
Typ.
4.57
1.00
3.8
2.8
30
27
71
10
4.5
3
December 15, 2009
0.3V
0.3V
Max.
Max.
2.00
V
V
3.3
3.3
4.0
3.3
20
50
6
DD
DD
DD
DD
Ta=25 C
Ta=25 C
MHz
Unit
Unit
t
mA
mA
mA
k
ms
ms
ms
ms
SYS
V
V
V
V
V
V
V
V
A
s