TC70 データシートの表示（PDF） - TelCom Semiconductor, Inc
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TC70
TelCom Semiconductor, Inc
TC70 Datasheet PDF : 7 Pages
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MICROMASTER™ – SYSTEM SUPERVISOR
WITH POWER SUPPLY MONITOR, WATCHDOG
AND BATTERY BACKUP
1
TC70/71
ELECTRICAL CHARACTERISTICS: (Cont.)
DC: Battery Backup and Threshold Detector: TA = TMIN to TMAX, VCC = 4.5V to 5.5V, unless otherwise specified.
2
Symbol Parameter
Test Conditions
Min
Typ
Max Unit
IOUT1
VCCO Output Current
VCC = 4.5V, VCCO = 3.5V
50
100
—
mA
IOUT2
VCCO Output Current in
Battery Backup Mode
VCCO = VBATT – 0.3V
VBATT = 2.8V
500
—
—
µA
VSW
Battery Switchover Threshold
—
VBATT – 0.01 —
V
(VCC Falling)
VHYST
Battery Switchover Hysteresis
—
20
VOHCEO
CEO Output Voltage in
VCC < VBATT – 0.2, VBATT = 2.8V VBATT – 0.2
—
— mV
—
V
3
Battery Backup Mode
IOH = 10µA
VTDI
Threshold Detector Trip Voltage
1.2
—
1.4
V
ITDI
Threshold Detector Input Current TA = 25°C
–25
—
+25 nA
VTDI (HYST) Threshold Detector Hysteresis
—
10
— mV
ELECTRICAL CHARACTERISTICS:
AC: Power Supply Monitor, EXT. RESET and Watchdog: TA = TMIN to TMAX, VCC = 4.5V to 5.5V, unless otherwise
4
specified.
Symbol
tPBH
tRST
tST
tTD
tRPD
Parameter
PB Hold Time
Reset Active Time
RS STROBE Pulsewidth
Watchdog Timeout Period
VCC Detect to RS LOW
Test Conditions
Figure 4 (Note 4)
Figure 6
Figure 3
Figure 3
Figure 6
Min
Typ
Max Unit
20
—
— msec
500
—
900 msec
500
—
— nsec
500
—
700
—
900 msec
100 nsec
5
ELECTRICAL CHARACTERISTICS:
AC: Battery Backup and Threshold Detector: TA = TMIN to TMAX, VCC = 4.5V to 5.5V, unless otherwise specified.
Symbol Parameter
Test Conditions
Min
Typ
Max Unit
tPD
CE Propagational Delay
Figure 7
ELECTRICAL CHARACTERISTICS:
AC: TA = TMIN to TMAX.
—
—
50 nsec
6
Symbol Parameter
Test Conditions
Min
Typ
Max Unit
tF
VCC Fall Time From
Figure 5 (Note 1)
10
4.25V to 3.0V
tR
VCC Rise Time From
Figure 5 (Note 1)
0
3.0V to 4.25V
NOTES: 1. All voltages referenced to ground.
2. No output load.
3 Measured with VCCO and CEO open.
4. The RS output must be held low for a minimum of 20msec to guarantee a reset.
—
— µsec
—
— µsec
7
TELCOM SEMICONDUCTOR, INC.
8
5-9
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