DDU-37F-25 - Data Delay Devices, Inc.

DDU37F

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 T2L fan-out capability)

• Resolution: As low as 0.12ns

• Minimum delay (TD0): 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 TD0 and TD0+ TDVAR,

where TDVAR 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

NCOUTVCC

1.640

.100

.200

.100

.060

delay

devices, inc.



DDU37F

GNDIN

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

TDVAR

(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-200 170

Note: Other delay times

available on request

2008 Data Dela

Devices

Doc #01016 DATA DELAY DEVICES, INC. 1

1/11/2008 3 Mt. Prospect Ave. Clifton, NJ 07013

DDU37F

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 VCC -0.3 7.0 V

Input Pin Voltage VIN -0.3 VDD+0.3 V

Storage Temperature TSTRG -55 150 C

Lead Temperature TLEAD 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 VOH 2.5 3.4 V VCC = MIN, IOH = MAX

VIH = MIN, VIL = MAX

Low Level Output Voltage VOL 0.35 0.5 V VCC = MIN, IOL = MAX

VIH = MIN, VIL = MAX

High Level Output Current IOH -1.0 mA

Low Level Output Current IOL 20.0 mA

High Level Input Voltage VIH 2.0 V

Low Level Input Voltage VIL 0.8 V

Input Clamp Voltage VIK -1.2 V VCC = MIN, II = IIK

Input Current at Maximum

Input Voltage

IIHH 0.1 mA VCC = MAX, VI = 7.0V

High Level Input Current IIH 20

µA VCC = MAX, VI = 2.7V

Low Level Input Current IIL -0.6 mA VCC = MAX, VI = 0.5V

Short-circuit Output Current IOS -60 -150 mA VCC = MAX

Output High Fan-out 25 Unit

Output Low Fan-out 12.5 Load

Doc #01016 DATA DELAY DEVICES, INC. 2

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DDU37F

DELAY LINE AUTOMATED TESTING

TEST CONDITIONS

INPUT: OUTPUT:

Ambient Temperature: 25oC ± 3oC Load: 1 FAST-TTL Gate

Supply Voltage (Vcc): 5.0V ± 0.1V Cload: 5pf ± 10%

Input Pulse: High = 3.0V ± 0.1V Threshold: 1.5V (Rising & Falling)

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: PWIN = 1.5 x Total Delay

Period: PERIN = 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 OUTOUT

TRIG

Test Setup

DEVICE UNDER

TEST (DUT) OSCILLOSCOPE

PULSE

GENERATOR

Timing Diagram For Testing

DRISE DFALL

PERIN

PWIN

TRISE TFALL

0.60.6 1.51.5

2.4 2.4

1.51.5

VIH

VIL

VOH

VOL

INPUT

SIGNAL

OUTPUT

SIGNAL

Doc #01016 DATA DELAY DEVICES, INC. 3

1/11/2008 3 Mt. Prospect Ave. Clifton, NJ 07013