3D7428 Datasheet, PDF (5/7 Pages) Data Delay Devices, Inc. – MONOLITHIC 8-BIT PROGRAMMABLE DELAY LINE

APPLICATION NOTES (CONT’D)
ENABLE
(AE)
PARALLEL
INPUTS
P0-P7
DELAY
TIME
t_EW
t_DSE
t_DHE
t_EDX
NEW VALUE
t_EDV
PREVIOUS
NEW VALUE
Figure 3: Latched parallel mode (MD=1)
ENABLE
(AE)
CLOCK
(SC)
SERIAL
INPUT
(SI)
SERIAL
OUTPUT
(SO)
DELAY
TIME
t_EW
t_ES
t_CW t_CW
t_EH
t_DSC
NEW
BIT 7
t_EGV
OLD
BIT 7
t_DHC
NEW
BIT 6
t_CQV
OLD
BIT 6
PREVIOUS VALUE
t_CQX
NEW
BIT 0
OLD
BIT 0
t_EDX
Figure 4: Serial mode (MD=0)
t_EQZ
t_EDV
NEW
VALUE
3D7428
FROM
WRITING
DEVICE
3D7428
SI
SO
SC AE
3D7428
SI
SO
SC AE
3D7428
SI
SO
SC AE
TO
NEXT
DEVICE
Figure 5: Cascading Multiple Devices
TABLE 2: DELAY VS. PROGRAMMED ADDRESS
PROGRAMMED ADDRESS
NOMINAL DELAY (NS)
PARALLEL P7 P6 P5 P4 P3 P2 P1 P0
PER 3D7428 DASH NUMBER
SERIAL
Msb
Lsb -0.25 -0.5
-1
-2
-5
-10 -20
STEP 0
0 0 0 0 0 0 0 0 10.50 10.5 10.5 10.5
15
23.5
42
STEP 1
0 0 0 0 0 0 0 1 10.75 11.0 11.5 12.5
20
33.5
62
STEP 2
0 0 0 0 0 0 1 0 11.00 11.5 12.5 14.5
25
43.5
82
STEP 3
0 0 0 0 0 0 1 1 11.25 12.0 13.5 16.5
30
53.5 102
STEP 4
0 0 0 0 0 1 0 0 11.50 12.5 14.5 18.5
35
63.5 122
STEP 5
0 0 0 0 0 1 0 1 11.75 13.0 15.5 20.5
40
73.5 142
STEP 253
STEP 254
STEP 255
CHANGE
1 1 1 1 1 1 0 1 73.75 137.0 263.5 516.5 1280 2553.5 5102
1 1 1 1 1 1 1 0 74.00 137.5 264.5 518.5 1285 2563.5 5122
1 1 1 1 1 1 1 1 74.25 138.0 265.5 520.5 1290 2573.5 5142
63.75 127.5 255.0 510.0 1275 2550.0 5100
Doc #03003
DATA DELAY DEVICES, INC.
5
11/1/04
3 Mt. Prospect Ave. Clifton, NJ 07013