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HARDWARE
1.20 Electrical characteristics
7470/7471/7477/7478 GROUP USER’S MANUAL
(3) 7477 group electrical characteristics
Table 1.20.9 shows the absolute maximum ratings of the 7477 group. Table 1.20.10 shows the
recommended operating conditions. Table 1.20.11 shows the electrical characteristics.
Table 1.20.12 shows the A-D converter characteristics.
Table 1.20.9 Absolute maximum ratings (7477group)
Unit
V
mW
°C
Symbol
VCC
VI
VO
Pd
Topr
Tstg
Parameter
Power source voltage
Input voltage
Output voltage
Power dissipation
Operating temperature
Storage temperature
Ratings
–0.3 to +7
–0.3 to VCC+0.3
1000 (Note)
–20 to +85
–40 to +150
Conditions
All voltages are based on VSS.
Output transistors are cut-off.
Ta = 25 °C
Note : The rating is 500 mW for the 32P2W-A package product.
Table 1.20.10 Recommended operating conditions (7477 group)
(VCC = 2.7 V to 5.5 V, VSS = 0 V, Ta = –20 °C to +85 °C, unless otherwise noted)
f(XIN) = 8 MHz
f(XIN) = 4 MHz
Symbol
Parameter
Unit
Limits
Max.
Typ.
Min.
4.5
2.7
0.8VCC
0.7VCC
0.8VCC
0
V
mA
MHz
kHz
MHz
5.5
4.5
VCC
0.2VCC
0.25VCC
0.16VCC
0.12VCC
–30
60
–10
20
–5
10
2
1
500
250
2
1
8
2.2VCC–2.0
5.0
0
Power source voltage
f(XIN) = 8.0 MHz
f(XIN) = (2.2VCC–2.0) MHz
Power source voltage
“H” input voltage P00 to P07, P10 to P17, P30 to P33
“H” input voltage P20 to P23, P40, P41
_______
“H” input voltage XIN, RESET
“L” input voltage P00 to P07, P10 to P17, P30 to P33
“L” input voltage P20 to P23, P40, P41
“L” input voltage XIN
_______
“L” input voltage RESET
“H” sum output current P00 to P07, P40 and P41
“H” sum output current P10 to P17
“L” sum output current P00 to P07, P40 and P41
“L” sum output current P10 to P17
“H” peak output current
P00 to P07, P10 to P17, P40, P41
“L” peak output current
P00 to P07, P10 to P17, P40, P41
“H” average output current
P00 to P07, P10 to P17, P40, P41 (Note 1)
“L” average output current
P00 to P07, P10 to P17, P40, P41 (Note 1)
VCC
VSS
VIH
VIL
IOH(sum)
IOL(sum)
IOH(peak)
IOL(peak)
IOH(avg)
IOL(avg)
f(CNTR)
f(SCLK)
f(XIN)
Notes 1: The average output current IOH (avg) or IOL (avg) are the average value during a 100 ms.
2: The oscillation frequency is at 50 % duty cycle.
Timer input frequency
CNTR0 (P32), CNTR1 (P33) (Note 2)
Serial I/O clock input frequency
SCLK (P16) (Note 2)
Clock input oscillation frequency
(Note 2)
f(XIN) = 8 MHz
f(XIN) = 4 MHz
f(XIN) = 8 MHz
f(XIN) = 4 MHz
Use as clock synchro-
nous serial I/O mode
Use as
UART
mode
VCC = 4.5 V to 5.5 V
VCC = 2.7 V to 4.5 V