X9400 Datasheet, PDF (11/21 Pages) Xicor Inc. – Quad Digitally Controlled Potentiometers (XDCP)

X9400
D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)
Symbol
I_CC1
I_CC2
I_SB
I_LI
I_LO
V_IH
V_IL
V_OL
Parameter
V_CC supply current (Active)
V_CC supply current (Nonvolatile
Write)
V_CC current (standby)
Input leakage current
Output leakage current
Input HIGH voltage
Input LOW voltage
Output LOW voltage
Min.
V_CC x 0.7
-0.5
Limits
Typ. Max.
400
Units
µA
1
mA
1
µA
10
µA
10
µA
V_CC + 0.5 V
V_CC x 0.1 V
0.4
V
Test Conditions
f_SCK = 2MHz, SO = Open,
Other Inputs = V_SS
f_SCK = 2MHz, SO = Open,
Other Inputs = V_SS
SCK = SI = V_SS, Addr. = V_SS
V_IN = V_SS to V_CC
V_OUT = V_SS to V_CC
I_OL = 3mA
ENDURANCE AND DATA RETENTION
Parameter
Minimum endurance
Data retention
Min.
100,000
100
Unit
Data changes per bit per register
years
CAPACITANCE
Symbol
C_OUT(4)
C_IN(4)
Test
Output capacitance (SO)
Input capacitance (A0, A1, SI, and SCK)
POWER-UP TIMING
Symbol
t_PUR(5)
t_PUW(5)
t_R V_CC(4)
Parameter
Power-up to initiation of read operation
Power-up to initiation of write operation
V_CC Power-up ramp
POWER-UP REQUIREMENTS (Power-up sequencing
can affect correct recall of the wiper registers)
The preferred power-on sequence is as follows: First
V_CC, then the potentiometer pins, R_H, R_L, and R_W.
Voltage should not be applied to the potentiometer
pins before V+ or V- is applied. The V_CC ramp rate
specifi-cation should be met, and any glitches or slope
changes in the V_CC line should be held to <100mV if
possible. If V_CC powers down, it should be held below
0.1V for more than 1 second before powering up again
in order for proper wiper register recall. Also, V_CC
should not reverse polarity by more than 0.5V. Recall
of wiper position will not be complete until V_CC, V+
and V-reach their final value.
Max.
8
6
Unit
pF
pF
Test Conditions
V_OUT = 0V
V_IN = 0V
Min.
0.2
Max.
1
5
50
Unit
ms
ms
V/msec
EQUIVALENT A.C. LOAD CIRCUIT
SDA Output
5V
1533Ω
100pF
11
FN8189.1
March 31, 2005