HT49CV3 Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT49CV3 Datasheet PDF : 44 Pages
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HT49RV3/HT49CV3
Pin Name
SDO
SCK
SCS
OSC4
OSC3
VDD
OSC2
OSC1
RES
I/O Options
Description
O
¾
Serial interface serial data output
I/O
¾
Serial interface serial clock input/output (initial ²input²).
I/O
¾
Serial interface chip select pin, output for master mode, input for slave mode.
O
I
RTC or
System Clock
Real time clock oscillators. OSC3 and OSC4 are connected to a 32768Hz
crystal oscillator for timing purposes or to a system clock source (depending
on the options). No built-in capacitor.
¾
¾
Positive power supply
OSC1 and OSC2 are connected to an RC network or a crystal (by options) for
O
I
Crystal or RC
the internal system clock. For RC operation, OSC2 is an output pin for 1/4
system clock. The system clock may come from the RTC oscillator. If the sys-
tem clock comes from RTCOSC, these two pins can be left floating.
I
¾
Schmitt trigger reset input, active low
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+6.0V
Input Voltage..............................VSS-0.3V to VDD+0.3V
IOL Total ..............................................................150mA
Total Power Dissipation .....................................500mW
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°C
IOH Total............................................................-100mA
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 reliabil-
ity.
D.C. Characteristics
Symbol
Parameter
VDD
Operating Voltage
VEE
VFD Supply Voltage
Test Conditions
VDD
Conditions
¾ fSYS=4MHz
¾ fSYS=8MHz
¾
¾
IDD1
3V No load, VFD off,
Operating Current (Crystal OSC) 5V fSYS=4MHz
IDD2
Operating Current (RC OSC)
3V No load, VFD off,
5V fSYS=4MHz
IDD3
Operating Current
(fSYS=32768Hz)
3V
No load, VFD off
5V
IDD4
3V No load, VFD on,
Operating Current (Crystal OSC) 5V fSYS=4MHz
ISTB1 Standby Current (*fS=T1)
3V No load, system HALT
5V VFD off at HALT
ISTB2
Standby Current
(*fS=32768Hz OSC)
3V No load, system HALT
5V VFD off at HALT
VIL1
Input Low Voltage for I/O Ports, 3V
TMR and INT
5V
¾
Ta=25°C
Min. Typ. Max. Unit
2.2
¾
5.5
V
3.3
¾
5.5
V
0
¾ VDD-30 V
¾
2.0
3.0
mA
¾
5.0
8.0
mA
¾
1.8
2.7
mA
¾
4.6
7.5
mA
¾
1.2
2
mA
¾
4
7
mA
¾
3.5
4.5
mA
¾
7.5
12
mA
¾
¾
1
mA
¾
¾
2
mA
¾
4
10
mA
¾
14
20
mA
0
¾ 0.2VDD V
Rev. 1.30
4
March 20, 2007
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