X4283 Datasheet, PDF (17/22 Pages) Xicor Inc. – CPU Supervisor with 128K EEPROM

X4283/85 – Preliminary Information
Power-Up and Power-Down Timing
V_CC
V_TRIP
0 Volts
t_PURST
t_PURST
t_F
t_R
t_RPD
RESET
(X4285)
RESET
(X4283)
RESET Output Timing
Symbol
V_TRIP
t_PURST
t_RPD⁽⁸⁾
t_F⁽⁸⁾
t_R⁽⁸⁾
V_RVALID
Parameter
Reset Trip Point Voltage, X4283/85-4.5A
Reset Trip Point Voltage, X4283/85
Reset Trip Point Voltage, X4283/85-2.7A
Reset Trip Point Voltage, X4283/85-2.7
Power-up Reset Time out
V_CC Detect to Reset/Output
V_CC Fall Time
V_CC Rise Time
Reset Valid V_CC
Note: (8) This parameter is periodically sampled and not 100% tested.
SDA vs. RESET Timing
SCL
SDA
t_RSP
t_RSP<t_WDO
t_RSP>t_WDO
V_RVALID
V_RVALID
Min.
4.5
4.25
2.85
2.55
100
100
100
1
Typ.
4.62
4.38
2.92
2.62
250
Max.
4.75
4.5
3.0
2.7
400
500
Unit
V
ms
ns
µs
µs
V
t_RST
t_RSP>t_WDO
t_RST
RESET
Note: All inputs are ignored during the active reset period (t_RST).
REV 1.17 11/27/00
www.xicor.com
Characteristics subject to change without notice. 17 of 22