X9241A_06 Datasheet, PDF (12/16 Pages) Intersil Corporation – Quad Digital Controlled Potentionmeters (XDCP™)

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)
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)
FIGURE 10. INPUT BUS TIMING
AC Electrical Specifications (Over recommended operating conditions unless otherwise stated.)
LIMITS
SYMBOL
PARAMETER
MIN
MAX
f_SCL
t_LOW
t_HIGH
t_R
t_F
T_i(9)
t_SU:STA
t_HD:STA
t_SU:DAT
t_HD:DAT
t_AA
t_DH
t_SU:STO
t_BUF
t_WR
t_STPWV
t_CLWV
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)
Wiper response time from stop generation
Wiper response from SCL LOW
0
4700
4000
4000
4000
250
0
30
4000
4700
100
1000
300
20
3500
10
500
1000
t_BUF
UNIT
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
µs
µs
REFERENCE
FIGURE
10
10
10
10
10
10
10 & 12
10 & 12
10
10
11
11
10 & 12
10
13
13
6
12
FN8164.5
December 14, 2006