DDU37F
Doc #01016
DATA DELAY DEVICES, INC.
1
11/12/01
3 Mt. Prospect Ave. Clifton, NJ 07013
MECHANICALLY VARIABLE
TTL DELAY LINE
(SERIES DDU37F)
FEATURES
PACKAGES
Ideal for "Set and Forget" applications
Multi-turn adjustment screw (approx. 40 turns)
Input & output fully TTL interfaced & buffered
(10 T
2
L fan-out capability)
Resolution:
As low as 0.12ns
Minimum delay (T
D0
):
6ns typical
Output rise time:
2ns typical
Min. input pulse width:
20% of maximum delay
Power dissipation:
230mW maximum
Operating temperature:
0
to 70
C (Commercial)
-55
to 125
C (Military)
Temperature coefficient: 100 PPM/
C
FUNCTIONAL DESCRIPTION
The DDU37F-series device is a mechanically variable, FAST-TTL interfaced
delay line. The signal input (IN) is reproduced at the tap output (OUT), shifted
by an amount which can be adjusted between T
D0
and T
D0
+ T
DVAR
, where
T
DVAR
is given by the device dash number (See Table). The device operates
from a single 5V supply and is TTL interfaced, capable of driving up to 10
TTL loads.
SERIES SPECIFICATIONS
Functional Diagram
GND
IN
OUT
.565
MAX
1.750
.285
.020
Package Dimensions
.187
.125
.200
MIN
.430
.100
IN
GND
NC
OUT
VCC
1.640
.100
.200
.100
.060
.060
data
delay
devices,
inc.
3
DDU37F
GND
IN
OUT
NC
VCC
DDU37F-xx
(Commercial)
DDU37F-xxM
(Military)
xx = Dash number
PIN DESCRIPTIONS
IN
Signal Input
OUT
Fixed Output
VCC
+5V
GND
Ground
NC
No connection
DASH NUMBER
SPECIFICATIONS
Part
Number
T
DVAR
(ns)
DDU37F-25
15
DDU37F-30
20
DDU37F-40
30
DDU37F-50
40
DDU37F-60
50
DDU37F-70
60
DDU37F-80
70
DDU37F-100
90
DDU37F-120
100
DDU37F-150
130
DDU37F-200
180
Note: Other delay times
available on request
2001 Data Delay Devices
DDU37F
Doc #01016
DATA DELAY DEVICES, INC.
2
11/12/01
Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The DDU37F tolerances are guaranteed for input
pulse widths and periods greater than those
specified in the test conditions. Although the
device will function properly for pulse widths as
small as 20% of the total delay and periods as
small as 40% of the total delay (for a symmetric
input), the delays may deviate from their values at
low frequency. However, for a given input
condition, the deviation will be repeatable from
pulse to pulse. Contact technical support at Data
Delay Devices if your application requires device
testing at a specific input condition.
POWER SUPPLY BYPASSING
The DDU37F relies on a stable power supply to
produce repeatable delays within the stated
tolerances. A 0.1uf capacitor from VCC to GND,
located as close as possible to the VCC pin, is
recommended. A wide VCC trace and a clean
ground plane should be used.
DEVICE SPECIFICATIONS
TABLE 1: ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
MIN
MAX
UNITS
NOTES
DC Supply Voltage
V
CC
-0.3
7.0
V
Input Pin Voltage
V
IN
-0.3
V
DD
+0.3
V
Storage Temperature
T
STRG
-55
150
C
Lead Temperature
T
LEAD
300
C
10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 70C, 4.75V to 5.25V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
High Level Output Voltage
V
OH
2.5
3.4
V
V
CC
= MIN, I
OH
= MAX
V
IH
= MIN, V
IL
= MAX
Low Level Output Voltage
V
OL
0.35
0.5
V
V
CC
= MIN, I
OL
= MAX
V
IH
= MIN, V
IL
= MAX
High Level Output Current
I
OH
-1.0
mA
Low Level Output Current
I
OL
20.0
mA
High Level Input Voltage
V
IH
2.0
V
Low Level Input Voltage
V
IL
0.8
V
Input Clamp Voltage
V
IK
-1.2
V
V
CC
= MIN, I
I
= I
IK
Input Current at Maximum
Input Voltage
I
IHH
0.1
mA
V
CC
= MAX, V
I
= 7.0V
High Level Input Current
I
IH
20
A
V
CC
= MAX, V
I
= 2.7V
Low Level Input Current
I
IL
-0.6
mA
V
CC
= MAX, V
I
= 0.5V
Short-circuit Output Current
I
OS
-60
-150
mA
V
CC
= MAX
Output High Fan-out
25
Unit
Output Low Fan-out
12.5
Load
DDU37F
Doc #01016
DATA DELAY DEVICES, INC.
3
11/12/01
3 Mt. Prospect Ave. Clifton, NJ 07013
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT:
OUTPUT:
Ambient Temperature: 25
o
C
3
o
C
Load:
1 FAST-TTL Gate
Supply Voltage (Vcc): 5.0V
0.1V
C
load
:
5pf
10%
Input Pulse:
High = 3.0V
0.1V
Threshold: 1.5V (Rising & Falling)
Low = 0.0V
0.1V
Source Impedance:
50
Max.
Rise/Fall Time:
3.0 ns Max. (measured
between 0.6V and 2.4V )
Pulse Width:
PW
IN
= 1.5 x Total Delay
Period:
PER
IN
= 10 x Total Delay
NOTE: The above conditions are for test only and do not in any way restrict the operation of the device.
IN
OUT
OUT
TRIG
IN
TRIG
Test Setup
DEVICE UNDER
TEST (DUT)
OSCILLOSCOPE
PULSE
GENERATOR
Timing Diagram For Testing
D
RISE
D
FALL
PER
IN
PW
IN
T
RISE
T
FALL
0.6
0.6
1.5
1.5
2.4
2.4
1.5
1.5
V
IH
V
IL
V
OH
V
OL
INPUT
SIGNAL
OUTPUT
SIGNAL
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