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1.20 Electrical characteristics
7470/7471/7477/7478 GROUP USER’S MANUAL
1.20 Electrical characteristics
1.20.1 Electrical characteristics
(1) 7470 group electrical characteristics
Table 1.20.1 shows the absolute maximum ratings of the 7470 group. Table 1.20.2 shows the
recommended operating conditions. Table 1.20.3 shows the electrical characteristics.
Table 1.20.4 shows the A-D converter characteristics.
Table 1.20.1 Absolute maximum ratings (7470 group)
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
–20 to +85
–40 to +150
Conditions
All voltages are based on VSS.
Output transistors are cut-off.
Ta = 25 °C
Table 1.20.2 Recommended operating conditions (7470 group)
(VCC = 2.7 V to 5.5 V, VSS = 0 V, Ta = –20 °C to +85 °C, unless otherwise noted)
Symbol
Parameter
Unit
Limits
Max.
Typ.
Min.
4.5
2.7
0.8VCC
0.7VCC
0.8VCC
0
V
mA
MHz
5.5
4.5
VCC
0.2VCC
0.25VCC
0.16VCC
0.12VCC
–30
60
–10
20
–5
10
2
1
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 of P00 to P07 and P40 and P41
“H” sum output current of P10 to P17 and P20 to P23
“L” sum output current of P00 to P07, P40 and P41
“L” sum output current of P10 to P17 and P20 to P23
“H” peak output current
P00 to P07, P10 to P17, P20 to P23, P4 0, P4 1
“L” peak output current
P00 to P07, P10 to P17, P20 to P23, P4 0, P4 1
“H” average output current
P00 to P07, P10 to P17, P20 to P23, P40, P41 (Note 1)
“L” average output current
P00 to P07, P10 to P17, P20 to P23, P40, P41 (Note 1)
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.
VCC
VSS
VIH
VIL
IOH(sum)
IOL(sum)
IOH(peak)
IOL(peak)
IOH(avg)
IOL(avg)
f(CNTR)
f(CLK)
f(XIN)
f(XIN) = 8 MHz
f(XIN) = 4 MHz
f(XIN) = 8 MHz
f(XIN) = 4 MHz
VCC = 4.5 V to 5.5 V
VCC = 2.7 V to 4.5 V
Timer input frequency
CNTR0 (P32),
CNTR1 (P33) (Note 2)
Serial I/O clock input frequency
CLK (P16) (Note 2)
Clock input oscillation frequency
(Note 2)