Datasheet

®
4
DAC7621
TIMING DIAGRAMS
LOGIC TRUTH TABLE
TIMING SPECIFICATIONS
T
A
= –40°C to +85°C
SYMBOL DESCRIPTION MIN TYP MAX UNITS
t
RCS
CS LOW for Read 200 ns
t
RDS
R/W HIGH to CS LOW 10 ns
t
RDH
R/W HIGH after CS HIGH 0 ns
t
DZ
CS HIGH to Data Bus 100 ns
in High Impedance
t
CSD
CS LOW to Data Bus Valid 100 160 ns
t
WCS
CS LOW for Write 50
t
WS
R/W LOW to CS LOW 0 ns
t
WH
R/W LOW after CS HIGH 5 ns
t
DS
Data Valid to CS LOW 0 ns
t
DH
Data Valid after CS HIGH 5 ns
t
LWD
LOADDAC LOW 50 ns
INPUT DAC
R/W CS LOADDAC REGISTER REGISTER MODE
L L L Write Write Write
L L H Write Hold Write Input
H L H Read Hold Read Input
X H L Hold Update Update
X H H Hold Hold Hold
X = Don’t Care.
t
RCS
CS
t
RDS
t
RDH
t
CSD
t
DZ
R/W
Data Out
Data Valid
t
WCS
CS
t
WS
t
WH
R/W
t
LWD
LOADDAC
t
DS
t
DH
Data In
Data Output Timing
Digital Input Timing