X9400 Datasheet, PDF (12/22 Pages) Xicor Inc. – Quad Digitally Controlled Potentiometers (XDCP)

X9400
A.C. TEST CONDITIONS
Input pulse levels
Input rise and fall times
V_CC x 0.1 to V_CC x 0.9
10ns
Input and output timing level V_CC x 0.5
Notes: (4) This parameter is periodically sampled and not 100% tested
(5) t_PUR and t_PUW are the delays required from the time the
third (last) power supply (V_CC, V+ or V-) is stable until the
specific instruction can be issued. These parameters are
periodically sampled and not 100% tested.
SPICE Macro Model
R_TOTAL
R_H
R_L
C_L
C_H
C_{W 10pF}
SYMBOL TABLE
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
Will be
steady
Will change
from Low to
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
10pF
25pF
R_W
AC TIMING
Symbol
Parameter
Min.
Max.
Unit
f_SCK
SSI/SPI clock frequency
2.0
MHz
t_CYC
SSI/SPI clock cycle time
500
ns
t_WH
SSI/SPI clock high time
200
ns
t_WL
SSI/SPI clock low time
200
ns
t_LEAD
Lead time
250
ns
t_LAG
Lag time
250
ns
t_SU
SI, SCK, HOLD and CS input setup time
50
ns
t_H
SI, SCK, HOLD and CS input hold time
50
ns
t_RI
SI, SCK, HOLD and CS input rise time
2
µs
t_FI
SI, SCK, HOLD and CS input fall time
2
µs
t_DIS
SO output disable time
0
500
ns
t_V
SO output valid time
100
ns
t_HO
SO output hold time
0
ns
t_RO
SO output rise time
50
ns
t_FO
SO output fall time
50
ns
t_HOLD
HOLD time
400
ns
t_HSU
HOLD setup time
100
ns
t_HH
HOLD hold time
100
ns
t_HZ
HOLD low to output in High Z
100
ns
t_LZ
HOLD high to output in Low Z
100
ns
T_I
Noise suppression time constant at SI, SCK, HOLD and CS inputs
20
ns
t_CS
CS deselect time
2
µs
t_WPASU WP, A0 and A1 setup time
0
ns
t_WPAH WP, A0 and A1 hold time
0
ns
REV 1.1.4 10/11/02
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Characteristics subject to change without notice. 12 of 22