X9241A Datasheet, PDF (12/16 Pages) Xicor Inc. – Quad Digitally Controlled Potentiometer (XDCP)

Equivalent AC Test Circuit
SDA Output
5V
1533Ω
100pF
Circuit #3 SPICE Macro Model
Macro Model
R_TOTAL
R_H
R_L
C_H
C_L
10pF
C_W ^10pF
25pF
R_W
X9241A
Guidelines for Calculating
Typical Values of Bus Pull-Up Resistors
120
100
R_MIN
=
V_{CC MAX}
I_{OL MIN}
=1.8kΩ
80
R_MAX
= ^tR
C_BUS
60
Max.
Resistance
40
20 _Min.
Resistance
0
0 ^{20 40 60}
80 ₁₀₀ 120
Bus Capacitance (pF)
DCP Wiper Current De-rating Curve
7
6
5
4
3
2
1
0
0 10 20 30 40 50 60 70 80 90
Ambient Temperature (°C)
AC Electrical Specifications (Over recommended operating conditions unless otherwise stated.)
LIMITS
SYMBOL
f_SCL(5)
t_LOW(5)
t_HIGH(5)
t_R(5)
t_F(5)
T_i(5)(9)
t_SU:STA(5)
t_HD:STA(5)
t_SU:DAT(5)
t_HD:DAT(5)
t_AA(5)
t_DH(5)
t_SU:STO(5)
t_BUF(5)
t_WR(5)
PARAMETER
SCL clock frequency
Clock LOW period
Clock HIGH period
SCL and SDA rise time
SCL and SDA fall time
Noise suppression time constant (glitch filter)
Start condition setup time (for a repeated start condition)
Start condition hold time
Data in setup time
Data in hold time
SCL LOW to SDA data out valid
Data out hold time
Stop condition setup time
Bus free time prior to new transmission
Write cycle time (nonvolatile write operation)
MIN
0
4700
4000
4700
4000
250
0
50
4700
4700
MAX
100
1000
300
20
3500
10
12
UNIT
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
REFERENCE
FIGURE
10
10
10
10
10
10
10 & 12
10 & 12
10
10
11
11
10 & 12
10
13
FN8164.1
September 15, 2005