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X5643 Datasheet, PDF (13/19 Pages) Intersil Corporation – CPU Supervisor with 64Kbit SPI EEPROM
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X5643, X5645
Power-Up and Power-Down Timing
VCC
VTRIP
0 Volts
tR
RESET (X5643)
tPURST
tPURST
RESET (X5645)
VTRIP
tF
tRPD
RESET Output Timing
Symbol
VTRIP
VTH
tPURST
tRPD(5)
tF(5)
tR(5)
VRVALID
Parameter
Reset trip point voltage, X5643-4.5A, X5643-4.5A
Reset trip point voltage, X5643, X5645
Reset trip point voltage, X5643-2.7A, X5645-2.7A
Reset trip point voltage, X5643-2.7, X5645-2.7
VTRIP hysteresis (HIGH to LOW vs. LOW to HIGH VTRIP voltage)
Power-up reset time out
VCC detect to reset/output
VCC fall time
VCC rise time
Reset valid VCC
Note: (5) This parameter is periodically sampled and not 100% tested.
CS/WDI vs. RESET/RESET Timing
CS/WDI
RESET
tCST
tWDO
tRST
tWDO
RESET
Min.
4.5
4.25
2.85
2.55
100
100
100
1
Typ.
4.63
4.38
2.93
2.63
20
200
Max.
4.75
4.5
3.0
2.7
280
500
Unit
V
mV
ms
ns
µs
µs
V
tRST
13
FN8135.1
July 18, 2005
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