X9241A_07 Datasheet, PDF (12/16 Pages) Intersil Corporation – Quad Digital Controlled Potentionmeters (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
15pF
C_W
15pF
25pF
R_W
X9241A
Guidelines for Calculating
Typical Values of Bus Pull-Up Resistors
120
100
R_MIN =
V_{CC MAX =1.8kΩ}
I_{OL MIN}
80
R_{MAX =}
T_R
C_BUS
60
MAXIMUM
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)
t_HIGH
t_LOW
t_F
t_R
SCL
t_SU:STA
t_HD:STA
t_HD:DAT
t_SU:DAT
t_SU:STO
SDA
(DATA IN)
t_BUF
FIGURE 10. INPUT BUS TIMING
AC Electrical Specifications (Over recommended operating conditions unless otherwise stated).
LIMITS
SYMBOL
PARAMETER
MIN
MAX
(Note 11) (Note 11)
UNIT
f_SCL
t_LOW
t_HIGH
t_R
t_F
T_i, (Note 11)
t_SU:STA
t_HD:STA
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
0
100
kHz
4700
ns
4000
ns
1000
ns
300
ns
20
ns
4000
ns
4000
ns
REFERENCE
FIGURE
NUMBER(S)
10
10
10
10
10
10
10 and 12
10 and 12
12
FN8164.6
August 31, 2007