Holtek HT49RA0 Manual page 4

Symbol Parameter
Standby Current
I
STB3
(*f =WDT RC OSC)
S
Input Low Voltage for I/O
V
IL1
Ports, TMR, INT0 and INT1
Input High Voltage for I/O
V
IH1
Ports, TMR, INT0 and INT1
V
Input Low Voltage (RES)
IL2
V
Input High Voltage (RES)
IH2
I
I/O Port & REM Sink Current
OL1
I
I/O Port & REM Source Current
OH1
LCD Common and Segment
I
OL2
Current
LCD Common and Segment
I
OH2
Current
R
Pull-high Resistance of I/O Ports
PH
V Low Voltage Reset Voltage
LVR
V
Low Voltage Detector Voltage
LVD
VDD Start Voltage to Ensure
V
POR
Power-on Reset
VDD Rise Rate to Ensure
R
POR
Power-on Reset
²*² for the value of VA refer to the LCD driver section.
Note:
t =1/f
SYS SYS
²*f ² please refer to WDT clock option
S
A.C. Characteristics
Symbol Parameter
f
System Clock
SYS
f RTC Frequency
RTCOSC
f
Timer I/P Frequency (TMR)
TIMER
t
Watchdog Oscillator Period
WDTOSC
t
External Reset Low Pulse Width
RES
t
Low Voltage Width to Reset
LVR
t
System Start-up Timer Period
SST
t
Interrupt Pulse Width
INT
Note: *t =1/f
SYS SYS
Rev. 1.50
Test Conditions
V Conditions
DD
No load, system HALT
3V
LCD On at HALT, C type
¾
3V
¾
3V
¾
3V
¾
3V
V =0.1V
3V
OL DD
V =0.9V
3V
OH DD
V =0.1V
3V
OL DD
V =0.9V
3V
OH DD
¾
3V
¾ ¾
¾ ¾
¾ ¾
¾ ¾
Test Conditions
V Conditions
DD
2.0V~3.6V, 4MHz ± 3%,
¾
Temp.= 0°C ~ 50°C
¾ ¾
¾
3V
¾
3V
¾ ¾
¾ ¾
¾
Wake-up from HALT
¾ ¾
4
HT49RA0/HT49CA0
Min. Typ. Max.
¾
2 5
¾
0.3V
0
DD
¾
0.7V V
DD DD
¾
0.4V
0
DD
¾
0.9V V
DD DD
¾
4 8
-5 -7 ¾
¾
210 420
-80 -160 ¾
100 150 200
2.0 2.1 2.2
2.2 2.3 2.4
¾ ¾
100
¾ ¾
0.035
Ta=25°C
Min. Typ. Max.
¾ ¾
4000
¾ ¾
32768
¾
0 4000
45 90 180
¾ ¾
1
0.25 1 2
¾ ¾
*t
1024
¾ ¾
1
March 20, 2014
Unit
mA
V
V
V
V
mA
mA
mA
mA
kW
V
V
mV
V/ms
Unit
kHz
Hz
kHz
ms
ms
ms
SYS
ms