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| FT7521 Datasheet, PDF (4/9 Pages) Fairchild Semiconductor – Reset Timer with Fixed Delay and Reset Pulse | |||
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DC Electrical Characteristics
Conditions of TA=-40 to 80°C with VCC=1.8 - 5.0 V OR TA=-25 to 85°C with VCC=1.7 â 5 V OR TA=0 to 85°C with
VCC=1.65 â 5 V produce the performance characteristics below.
Symbol
VIH
VIL
VOL
RPU
IIN
ICC
Parameter
Condition
Input High Voltage
DSR, /SR0
Input Low Voltage
DSR, /SR0
Low Level Output Voltage
Integrated Pull-Up Resistor on /SR0
RST, IOL=500 µA
RST, IOL=3 mA, VCC=3.0 V
Input Leakage Current /SR0
Input Leakage Current DSR
Quiescent Supply Current (Timer
Inactive)
VIN= VCC
0V ï£ VIN ï£ 5.0 V
/SR0=VCC
Dynamic Supply Current (Timer Active) /SR0=0 V
Min.
0.65 x VCC
Typ. Max. Unit
V
0.25 x VCC V
0.3
V
0.3
50
kâ¦
ï±1.0
µA
ï±1.0
1
µA
200
AC Electrical Characteristics
Conditions of TA=-40 to 80°C with VCC=1.8 - 5.0 V OR TA=-25 to 85°C with VCC=1.7 â 5 V OR TA=0 to 85°C with
VCC=1.65 â 5 V produce the performance characteristics below.
Symbol
Parameter
tPHL1 Timer Delay, /SR0 to RST (DSR=0)
tREC Reset Timeout Delay
Condition
CL=5 pF, RL=5 Kï,
see Figure 4
Min. Typ. Max. Unit
6.0 7.5 9.0
s
320 400 480 ms
Capacitance Specifications
TA=+25ï°C.
Symbol
Parameter
CIN
COUT
Input Capacitance
Output Capacitance
VCC=GND
VCC=5.0 V
Condition
Typ.
4
5
Unit
pF
pF
© 2009 Fairchild Semiconductor Corporation
FT7521 ⢠Rev. 1.0.7
4
www.fairchildsemi.com
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