X93156 Datasheet, PDF (5/8 Pages) Intersil Corporation – Digitally Controlled Potentiometer

X93156
AC Electrical Specifications Over recommended operating conditions unless otherwise specified. (Continued)
SYMBOL
PARAMETER
MIN
TYP
MAX
t_CPH
t_CYC
t_R, t_F
(Note 7)
CS Deselect time (STORE)
INC cycle time
INC input rise and fall time
10
2
500
t_R V_CC VCC power-up rate
(Note 7)
0.2
10,000
t_WR
Store cycle
5
10
A.C. Timing
UNIT
ms
µs
µs
V/ms
ms
CS
t_CI
INC
t_CYC
t_IL
t_IH
t_IC
t_ID
t_DI
t_CPHS
90% 90%
10%
t_CPHNS
t_F
t_R
U/D
t_IW
R_W
MI ^{(Note 4)}
Power Up and Down Requirements
There are no restrictions on the power-up or power-down
conditions of V_CC and the voltages applied to the
potentiometer pins provided that V_CC is always more
positive than or equal to V_H and V_L, i.e., V_CC ≥ V_H,V_L. The
V_CC ramp rate spec is always in effect.
Pin Descriptions
R_H and R_L
The R_H and R_L pins of the X93156 are equivalent to the fixed
terminals of a mechanical potentiometer. The minimum
voltage is V_SS and the maximum is V_CC. The terminology of
R_H and R_L references the relative position of the terminal in
relation to wiper movement direction selected by the U/D
input.
R_w
The Rw pin of the X93156 is the wiper terminal of the
potentiometer which is equivalent to the movable terminal of
a mechanical potentiometer
Up/Down (U/D)
The U/D input controls the direction of the wiper movement
and whether the counter is incremented or decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC will
move the wiper and either increment or decrement the
counter in the direction indicated by the logic level on the
U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory when
CS is returned HIGH while the INC input is also HIGH. After
the store operation is complete the X93156 will be placed in
the low power standby mode until the device is selected
once again.
5
FN8182.2
September 16, 2005