DDU39F
MECHANICALLY VARIABLE
TTL DELAY LINE
(SERIES DDU39F)
FEATURES
•
•
•
•
•
•
•
•
•
•
Ideal for “Set and Forget” applications
Multi-turn adjustment screw (approx. 15 turns)
Fits standard 16-pin DIP socket
Input & output fully TTL interfaced & buffered
2
(10 T L fan-out capability)
Resolution:
0.5ns typical
Adjustment range:
7ns to 25ns
Output rise time:
4ns typical
Min. input pulse width:
10ns
Power dissipation:
230mW maximum
Operating temperature:
0° to 70°C (Commercial)
-55° to 125°C (Military)
IN
NC
NC
NC
NC
NC
NC
GND
data
3
®
delay
devices,
inc.
PACKAGES
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
NC
OUT
NC
NC
NC
NC
GND
DDU39F
(Commercial)
DDU39FM (Military)
FUNCTIONAL DESCRIPTION
The DDU39F-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 7ns and 25ns. The device
operates from a single 5V supply and is TTL interfaced, capable of driving up
to 10 TTL loads.
PIN DESCRIPTIONS
IN
OUT
VCC
GND
NC
Signal Input
Fixed Output
+5V
Ground
No connection
SERIES SPECIFICATIONS
IN
OUT
GND
Functional Diagram
.500
.150
.150
.880
.100
.500
.265
.020
.012
.100
7 x .100 = .700
.070
.300
Package Dimensions
©
2001 Data Delay Devices
Doc #01017
11/12/01
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
DDU39F
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The DDU39F 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 10ns and periods as small 20ns (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 DDU39F 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
DC Supply Voltage
Input Pin Voltage
Storage Temperature
Lead Temperature
SYMBOL
V
CC
V
IN
T
STRG
T
LEAD
MIN
-0.3
-0.3
-55
MAX
7.0
V
DD
+0.3
150
300
UNITS
V
V
C
C
NOTES
10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 70C, 4.75V to 5.25V)
PARAMETER
High Level Output Voltage
Low Level Output Voltage
High Level Output Current
Low Level Output Current
High Level Input Voltage
Low Level Input Voltage
Input Clamp Voltage
Input Current at Maximum
Input Voltage
High Level Input Current
Low Level Input Current
Short-circuit Output Current
Output High Fan-out
Output Low Fan-out
SYMBOL
V
OH
V
OL
I
OH
I
OL
V
IH
V
IL
V
IK
I
IHH
I
IH
I
IL
I
OS
MIN
2.5
TYP
3.4
0.35
MAX
UNITS
V
V
mA
mA
V
V
V
mA
µA
mA
mA
Unit
Load
NOTES
V
CC
= MIN, I
OH
= MAX
V
IH
= MIN, V
IL
= MAX
V
CC
= MIN, I
OL
= MAX
V
IH
= MIN, V
IL
= MAX
0.5
-1.0
20.0
2.0
0.8
-1.2
0.1
20
-0.6
-150
25
12.5
V
CC
= MIN, I
I
= I
IK
V
CC
= MAX, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX
-60
Doc #01017
11/12/01
DATA DELAY DEVICES, INC.
Tel: 973-773-2299
Fax: 973-773-9672
http://www.datadelay.com
2
DDU39F
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT:
o
o
Ambient Temperature:
25 C
±
3 C
Supply Voltage (Vcc):
5.0V
±
0.1V
Input Pulse:
High = 3.0V
±
0.1V
Low = 0.0V
±
0.1V
Source Impedance:
50Ω Max.
Rise/Fall Time:
3.0 ns Max. (measured
between 0.6V and 2.4V )
Pulse Width:
100ns
Period:
1000ns
OUTPUT:
Load:
C
load
:
Threshold:
1 FAST-TTL Gate
5pf
±
10%
1.5V (Rising & Falling)
NOTE:
The above conditions are for test only and do not in any way restrict the operation of the device.
OUT
PULSE
GENERATOR
TRIG
IN
DEVICE UNDER
TEST (DUT)
OUT
IN
TRIG
OSCILLOSCOPE
Test Setup
PER
IN
PW
IN
T
RISE
INPUT
SIGNAL
2.4
1.5
0.6
T
FALL
V
IH
2.4
1.5
0.6
V
IL
D
FALL
V
OH
D
RISE
OUTPUT
SIGNAL
1.5
1.5
V
OL
Timing Diagram For Testing
Doc #01017
11/12/01
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
3
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