7470/7471/7477/7478 GROUP USER’S MANUAL
HARDWARE
1.20 Electrical characteristics
1-191
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
(2) 7471 group electrical characteristics
Table 1.20.5 shows the absolute maximum ratings of the 7471 group. Table 1.20.6 shows the
recommended operating conditions. Table 1.20.7 shows the electrical characteristics.
Table 1.20.8 shows the A-D converter characteristics.
Table 1.20.5 Absolute maximum ratings (7471 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 (Note)
–20 to +85
–40 to +150
Conditions
All voltages are based on VSS.
Output transistors are cut-off.
Ta = 25 °C
Symbol
Parameter
Unit
Limits
Max.
Typ.
Min.
4.5
2.7
0.8VCC
0.7VCC
0.8VCC
0
V
mA
MHz
kHz
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
50
5.0
0
32
Power source voltage
f(XIN) = 8.0 MHz
f(XIN) = (2.2VCC–2.0) MHz
Power source voltage
Analog supply voltage
“H” input voltage P00 to P07, P10 to P17, P30 to P33
“H” input voltage P20 to P27, P40 to P43, P50 to P53 (Note 1)
_______
“H” input voltage XIN, RESET
“L” input voltage P00 to P07, P10 to P17, P30 to P33
“L” input voltage P20 to P27, P40 to P43, P50 to P53 (Note 1)
“L” input voltage XIN
_______
“L” input voltage RESET
“H” sum output current of P00 to P07 and P40 to P43
“H” sum output current of P10 to P17 and P20 to P27
“L” sum output current of P00 to P07 and P40 to P43
“L” sum output current of P10 to P17 and P20 to P27
“H” peak output current
P00 to P07, P1 0 to P17, P20 to P27, P40 to P43
“L” peak output current
P00 to P07, P1 0 to P17, P20 to P27, P40 to P43
“H” average output current
P00 to P07, P1 0 to P17, P20 to P27, P40 to P43 (Note 2)
“L” average output current
P00 to P07, P1 0 to P17, P20 to P27, P40 to P43 (Note 2)
VCC
VSS
AVSS
VIH
VIL
IOH(sum)
IOL(sum)
IOH(peak)
IOL(peak)
IOH(avg)
IOL(avg)
f(CNTR)
f(CLK)
f(XIN)
f(XCIN)
Note: The rating is 500 mW for the 56P6N-A package product.
Table 1.20.6 Recommended operating conditions (7471 group)
(VCC = 2.7 V to 5.5 V, VSS = AVSS = 0 V, Ta = –20 °C to +85 °C, unless otherwise noted)
Timer input frequency
CNTR0 (P32)
CNTR1 (P33) (Note 3)
Serial I/O clock input frequency
CLK (P16) (Note 3)
Clock input oscillation frequency
(Note 3)
Notes 1: Except when P50 is used as XCIN.
2: The average output current IOH(avg) or IOL(avg) are the average value during a 100 ms.
3: The oscillation frequency is at 50 % duty cycle.
4: Set f(XCIN) < f(XIN)/3 when the sub-clock is used.
Sub-clock input oscillation frequency (Note 3, 4)