X40620 Datasheet, PDF (12/17 Pages) Xicor Inc. – Dual Voltage CPU Supervisor with 64K Serial EEPROM

X40620
TIMING DIAGRAMS
Bus Timing
t_R
SCL
t_SU:STA
SDA IN
t_F
t_HIGH
t_SU:DAT
t_HD:STA
t_LOW
t_HD:DAT
SDA OUT
t_AA t_DH
t_SU:STO
t_BUF
Write Cycle Timing
SCL
SDA
8th Bit of Last Byte
ACK
Stop
Condition
t_WC
Start
Condition
GUIDELINES FOR CALCULATING TYPICAL VALUES OF BUS PULL UP RESISTORS
10
8
6
R_PMAX
4
2
RMIN
10 20 30 40 50
Bus capacitance in pF
RMIN = ^V----^C-----^C-----^M-----^A-----^X-----–-----⁰---^.--⁴- = 1100Ω
I_OLMIN
VIH
=
Vc
c




1
–
eR^{-----P----M–---t--RA----M-X----C-A----BX----U-----S--}_{}




For V_IH = 0.9V_CC
tR
RPMAX = -2---.--3---₍---_C----_B-----_U-----_S----₎
t_RMAX = maximum allowable SDA rise time
Characteristics subject to change without notice. 12 of 17