X9250 Datasheet, PDF (13/21 Pages) Xicor Inc. – Quad Digitally Controlled Potentiometers (XDCP)

X9250
HIGH-VOLTAGE WRITE CYCLE TIMING
Symbol
t_WR
Parameter
High-voltage write cycle time (store instructions)
Typ.
5
XDCP TIMING
Symbol
t_WRPO
t_WRL
t_WRID
Parameter
Wiper response time after the third (last) power supply is stable
Wiper response time after instruction issued (all load instructions)
Wiper response time from an active SCL/SCK edge (increment/decrement instruc-
tion)
SYMBOL TABLE
Max.
10
Unit
ms
Min.
Max.
10
10
40
Unit
µs
µs
µs
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
TIMING DIAGRAMS
Input Timing
CS
SCK
SI
t_LEAD
t_SU
t_H
t_WL
MSB
t_CYC
...
t_WH
t_FI
...
t_CS
t_RI
LSB
t_LAG
SO
High Impedance
REV 1.1.5 1/31/03
www.xicor.com
Characteristics subject to change without notice. 13 of 21