Toshiba TC9457F Computer Hardware User Manual


 
TC9457F
2002-10-21
10
Maximum Ratings
(Ta = 25°C)
Characteristics Symbol Rating Unit
Power supply voltage V
DD
0.3~6.0 V
Input voltage V
IN
0.3~V
DD
+ 0.3 V
Power dissipation P
D
1400 mW
Operating temperature T
opr
40~85 °C
Storage temperature T
stg
65~150 °C
Electrical Characteristics
(Ta = 25
°
C, V
DD
= MV
DD
= AV
DD
= DV
DD
= XV
DD
= 5 V,
2V
REF
= P2V
REF
= 4.2 V, V
REF
= PV
REF
= 2.1 V, unless otherwise specified)
MV
DD
(CPU unit power supply)
Characteristics Symbol
Test
Circuit
Test Condition Min Typ. Max Unit
MV
DD1
When CPU and CD operating.
However,
MV
DD
V
DD
(Note 5)
4.5 5.0 5.5
MV
DD2
When CPU operating
(CD powered off, 4.5 MHz
crystal connected) (Note 5)
4.5 5.0 5.5
Operating supply voltage
MV
DD3
When CPU operating (CD
powered off, 75 kHz crystal
connected) (Note 5)
2.7 5.0 5.5
V
Memory retention voltage range MVHD
When crystal oscillator stopped
(CKSTP instruction executed)
(Note 5)
2.0 ~ 5.5 V
MV
DD1
When CPU operating
(XI = 16.9344 MHz crystal
connected)
1.0 2.0
MV
DD2
When CPU operating(MXI =
4.5 MHz crystal connected)
2.0 4.0
MV
DD3
When CPU operating (MXI =
75 kHz crystal connected)
0.75 2.0
Operating supply current
MV
DD4
Standby mode (only crystal
oscillating, 4.5 MHz or 75 kHz
crystal connected)
0.5 15
mA
Memory retention current MIHD
When crystal oscillator stopped
(CKSTP instruction executed)
0.1 1.0 µA
f MXT1
Rf = 1 M, Rout = 0 ,
Ci = Co = 30 pF (Note 5, 6)
4.5 MHz
Crystal oscillation frequency
f MXT2
Rf = 10 M, Rout = 100 k,
Ci = Co = 15 pF,
MV
DD
= 2.7~5.5 V (Note 5, 6)
75 kHz
Crystal oscillation start time tst
Crystal oscillation fmxt = 75
kHz
1.0 s
Note 5: Guaranteed at V
DD
= MV
DD
= 4.5 to 5.5 V and Ta = 40 to 85°C
Note 6: Consider the crystal resonator used in your system when determining constants, etc.