HT45R38
Pin Name
VSS
I/O
¾
¾
¾
¾
Options
Description
Negative power supply, ground
¾
¾
¾
¾
VSSC
VDD
Negative power supply for PC, ground
Positive power supply
VDDB
Positive power supply PB
OSC1, OSC2 are connected to an RC network or Crystal determined by a
configuration option, for the internal system clock. In the case of the RC os-
cillator, OSC2 can be used to monitor the system clock. Its frequency is 1/4
system clock.
OSC1
OSC2
I
Crystal or RC
O
Note: *All pull-high resistors are controlled by an option bit.
Absolute Maximum Ratings
Supply Voltage...........................VSS-0.3V to VSS+6.0V
Input Voltage..............................VSS-0.3V to VDD+0.3V
Storage Temperature............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°C
IOH Total............................................................-200mA
I
OL Total ..............................................................300mA
Total Power Dissipation .....................................500mW
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
Ta=25°C
Test Conditions
Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
VDD
f
f
SYS=4MHz
2.2
3.3
¾
5.5
5.5
2
V
V
¾
¾
1
VDD
Operating Voltage
¾
SYS=8MHz
3V
5V
mA
mA
Operating Current
IDD1
IDD2
ISTB1
No load, fSYS=4MHz
No load, fSYS=8MHz
No load, system HALT
(Crystal OSC, RC OSC)
3
5
¾
Operating Current
5V
4
8
mA
¾
(Crystal OSC, RC OSC)
3V
5V
3V
5V
5
10
1
¾
¾
¾
¾
¾
¾
¾
¾
mA
mA
mA
mA
Standby Current (WDT Enabled)
Standby Current (WDT Disabled)
ISTB2
No load, system HALT
2
Input Low Voltage for I/O Ports,
TMR0, TMR1, INT0 and INT1
VIL1
0.3VDD
VDD
0
V
V
¾
¾
¾
¾
¾
¾
Input High Voltage for I/O Ports,
TMR0, TMR1, INT0 and INT1
VIH1
0.7VDD
VIL2
0.4VDD
VDD
3.3
¾
Input Low Voltage (RES)
Input High Voltage (RES)
Low Voltage Reset
0
0.9VDD
2.7
4
V
¾
¾
¾
¾
¾
¾
VIH2
VLVR
V
LVRenabled
3.0
8
V
¾
3V
5V
3V
5V
mA
mA
mA
mA
PA, PB, PE, RREF and CREF
Sink Current
IOL1
VOL=0.1VDD
VOH=0.9VDD
10
20
-4
-10
¾
-2
¾
PA, PC, PE, RREF and CREF
Source Current
IOH1
-5
¾
Rev. 1.00
4
December 13, 2006
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
