MP7628 Exar Corporation, MP7628 Datasheet - Page 6

• Manufacturer Part Number: MP7628
• Description: 5 V Cmos Quad Multiplying 8-bit Digital-to-analog Converter
• Manufacturer: Exar Corporation

TIMING DIAGRAM READ CYCLE
TIMING DIAGRAM WRITE CYCLE
MODE SELECTION TABLE
MP7628
Rev. 2.00
DATA (D
DAC A OUT
DAC B OUT
BUS (D )
R/W
DS1
DS2
A/B
R/W
DS1
DS2
N
A/B
N
)
H
H
H
L
Set up time for BUS, A/B, R/W
Minimum DS = low pulse
Minimum time between DS = low pulses
Data delay time
t
R
= t
3-state
DS1
DSR
L
L
H
H
L
L
H
H
L
L
H
L
L
t
S
+ t
Set up time for BUS, A/B, R/W
Minimum DS = low pulse
Minimum time between DS = low pulses
Data delay time
t
Last Data
W
NR
= t
t
D
DS2
DSW
H
H
L
L
H
H
L
L
L
L
H
L
L
t
S
+ t
t
DSR
NW
A/B
t
D
H
L
H
L
H
L
H
L
H
L
X
H
L
Data (A)
6
R/W
Last Data
L
L
L
L
H
H
H
H
L
L
X
H
H
A Select
Data (A)
t
DSW
MODE
WRITE
WRITE
WRITE
WRITE
READ
READ
READ
READ
WRITE
WRITE
HOLD
HOLD
HOLD
t
NR
= 40 ns
= 320 ns
= 120 ns
= 200 ns
t
DHLD
3-state
Data (A)
A
B
C
D
A
B
C
D
A & C
B & D
A/B/C/D
A/B/C/D
A/B/C/D
= 40 ns
= 200 ns
= 120 ns
= 110 ns
DAC
t
t
t
t
S
DSR
NR
D
t
D
t
NW
(min)
t
S
t
t
t
t
+ t
S
DSW
NW
D
B Select
D
Data (B)
Data (B)
(min)
L = LOW STATE
H = HIGH STATE
X = DON’T CARE
Data (B)