X46402 Datasheet, PDF (19/23 Pages) Xicor Inc. – Dual Voltage CPU Supervisor with 64K Password Protected EEPROM

X46402
Preliminary Information
GUIDELINES FOR CALCULATING TYPICAL VALUES OF BUS PULL UP RESISTORS
10
8
6
R_PMAX
4
2
R_MIN
10 20 30 40 50
Bus capacitance in pF
RMIN = ^V_----^C_-----^C_-----^M_-----^A_-----^X_-----^–_----⁰_----^._-⁴_--= 1100Ω
I_OLMIN
V_IH
=
V
c
c



1
–
eR^{-----P---–M---t--RA----MX----C-A---B-X---U-----S-}




For V_IH = 0.9V_CC
R_PMAX
=
-------------^t--^R---------------
2.3(CBUS)
t_RMAX = maximum allowable SDA rise time
POWER-UP AND POWER-DOWN TIMING
RESET Output Timing
VCC
VTRIP
0 Volts
t _RV
t _PURST
RESET
V2FAIL Output Timing
V2MON ^V2TRIP
0 Volts
tRB
V2FAIL
t _PURST
VTRIP
t _FV
t _DVC
V2 _TRIP
tFB
t _DVB
19