X9319 Datasheet, PDF (5/10 Pages) Xicor Inc. – Digitally Controlled Potentiometer (XDCP)

X9319
A.C. OPERATING CHARACTERISTICS
(V_CC = 5V ±10%, T_A = Full Operating Temperature Range unless otherwise stated)
Limits
Symbol
Parameter
Min.
Typ.⁽⁴⁾
t_Cl
t_lD⁽⁵⁾
t_DI⁽⁵⁾
t_lL
t_lH
t_lC
t_CPHS
t_CPHNS⁽⁵⁾
t_IW⁽⁵⁾
t_CYC
t_R, t_F⁽⁵⁾
t_PU⁽⁵⁾
t_R V_CC⁽⁵⁾
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC inactive to CS inactive
CS deselect time (STORE)
CS deselect time (NO STORE)
INC to R_W change
INC cycle time
INC input rise and fall time
Power up to wiper stable
V_CC power-up rate
100
100
1
1
1
1
20
1
100
4
0.2
Max.
500
500
500
50
Unit
ns
ns
µs
µs
µs
µs
ms
µs
µs
µs
µs
µs
V/ms
POWER UP AND DOWN REQUIREMENTS
In order to prevent unwanted tap position changes, or an inadvertant store, bring the CS and INC high before or
concurrently with the V_CC pin on powerup. The potentiometer voltages must be applied after this sequence is com-
pleted. During power-up, the data sheet parameters for the DCP do not fully apply until 1 millisecond after V_CC
reaches its final value. The V_CC ramp spec is always in effect.
A.C. TIMING
CS
t_CI
INC
U/D
t_IW
R_W
t_CYC
t_IL
t_IH
t_ID
t_IC
t_DI
MI ⁽³⁾
t_CPHS
90% 90%
10%
t_CPHNS
t_F
t_R
REV 1.7 7/10/03
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