3D7408 Datasheet, PDF (5/7 Pages) Data Delay Devices, Inc. – MONOLITHIC 8-BIT PROGRAMMABLE DELAY LINE

ENABLE
(AE)
CLOCK
(SC)
SERIAL
INPUT
(SI)
SERIAL
OUTPUT
(SO)
DELAY
TIME
APPLICATION NOTES (CONT’D)
t_EW
t_ES
t_CW t_CW
t_EH
3D7408
t_DSC
NEW
BIT 7
t_EGV
OLD
BIT 7
t_DHC
NEW
BIT 6
t_CQV
OLD
BIT 6
t_CQX
PREVIOUS VALUE
Figure 4: Serial mode (MD=0)
NEW
BIT 0
OLD
BIT 0
t_EDX
t_EQZ
t_EDV
NEW
VALUE
FROM
WRITING
DEVICE
3D7408
SI
SO
SC AE
3D7408
SI
SO
SC AE
3D7408
SI
SO
SC AE
TO
NEXT
DEVICE
Figure 5: Cascading Multiple Devices
TABLE 2: DELAY VS. PROGRAMMED ADDRESS
PARALLEL
SERIAL
STEP 0
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
PROGRAMMED ADDRESS
NOMINAL DELAY (NS)
P7 P6 P5 P4 P3 P2 P1 P0 3D7408 DASH NUMBER
Msb
Lsb -.25
-.5 -1 -2
-5
0
0
0
0
0
0
0
0 12.00 12.0 12 12 17
0
0
0
0
0
0
0
1 12.25 12.5 13 14 22
0
0
0
0
0
0
1
0 12.50 13.0 14 16 27
0
0
0
0
0
0
1
1 12.75 13.5 15 18 32
0
0
0
0
0
1
0
0 13.00 14.0 16 20 37
0
0
0
0
0
1
0
1 13.25 14.5 17 22 42
STEP 253
1
1
1
1
1
1
0
1 75.25 138.5 265 518 1283
STEP 254
1
1
1
1
1
1
1
0 75.50 139.0 266 520 1287
STEP 255
1
1
1
1
1
1
1
1 75.75 139.5 267 522 1292
DELAY CHANGE
63.75 127.5 255 510 1275
Doc #96003
DATA DELAY DEVICES, INC.
5
12/2/96
3 Mt. Prospect Ave. Clifton, NJ 07013