DDU7F
10-TAP, TTL-INTERFACED
FIXED DELAY LINE
(SERIES DDU7F)
FEATURES
•
•
•
•
•
•
Ten equally spaced outputs
Fits standard 14-pin DIP socket
Low profile
Auto-insertable
Input & outputs fully TTL interfaced & buffered
10 T
2
L fan-out capability
IN
N/C
T2
T4
T6
T8
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
data
3
®
delay
devices,
inc.
PACKAGES
VCC
T1
T3
T5
T7
T9
T10
IN
T2
T4
T6
T8
T10
N/C
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
T1
T3
T5
T7
T9
N/C
N/C
DDU7F-xx
DDU7F-xxA2
DDU7F-xxB2
DDU7F-xxM
DIP
Gull-Wing
J-Lead
Military DIP
Military SMD
DDU7F-xxMC3
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
The DDU7F-series device is a 10-tap digitally buffered delay line. The
IN
Signal Input
signal input (IN) is reproduced at the outputs (T1-T10), shifted in time by an
T1-T10 Tap Outputs
amount determined by the device dash number. The nominal tap-to-tap
VCC +5 Volts
delay increment is given by 1/10 of the dash number. For dash numbers
GND Ground
less than 50, the total delay of the line is measured from T1 to T10, with the
nominal value given by 9 times the increment. The inherent delay from IN to T1 is nominally 3.5ns. For
dash numbers greater than or equal to 50, the total delay of the line is measured from IN to T10, with the
nominal value given by the dash number.
SERIES SPECIFICATIONS
•
•
•
•
•
•
Minimum input pulse width:
20% of total delay
Output rise time:
2ns typical
Supply voltage:
5VDC
±
5%
Supply current:
I
CCL
= 50ma typical
I
CCH
= 15ma typical
Operating temperature:
0° to 70° C
Temp. coefficient of total delay:
100 PPM/°C
3.5ns
10%
10%
10%
10%
10%
10%
10%
10%
10%
DASH NUMBER SPEC.’S
Part
Number
DDU7F-10
DDU7F-20
DDU7F-25
DDU7F-50
DDU7F-100
DDU7F-150
DDU7F-200
DDU7F-250
DDU7F-300
DDU7F-400
DDU7F-500
Total
Delay (ns)
9
±
2.0 *
18
±
2.0 *
22.5
±
2.0 *
50
±
2.5
100
±
5.0
150
±
7.5
200
±
10.0
250
±
12.5
300
±
15.0
400
±
20.0
500
±
25.0
Delay Per
Tap (ns)
1.0
±
0.5
2.0
±
1.0
2.5
±
1.0
5.0
±
2.0
10.0
±
3.0
15.0
±
3.0
20.0
±
3.0
25.0
±
3.0
30.0
±
3.0
40.0
±
4.0
50.0
±
5.0
VCC IN
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10 GND
* Total delay is referenced to first tap
Input to first tap = 3.5ns
±
1ns
NOTE: Any dash number between 10 and
500 not shown is also available.
Functional diagram for dash numbers < 50
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
VCC IN
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10 GND
Functional diagram for dash numbers >= 50
©
1997 Data Delay Devices
Doc #97016
1/29/97
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
DATADELAY [ DATA DELAY DEVICES, INC. ]
