3D7438

Doc #10004

DATA DELAY DEVICES, INC.

1

7/8/2010

3 Mt. Prospect Ave. Clifton, NJ 07013

MONOLITHIC 8-BIT

PROGRAMMABLE DELAY LINE

(SERIES 3D7438)

FEATURES

PACKAGES



All-silicon, low-power CMOS technology



TTL/CMOS compatible inputs and outputs



Vapor phase, IR and wave solderable



Leading- and trailing-edge accuracy



Programmable via serial or parallel interface



Increment range: 50ps through 250ps



Delay tolerance: 0.5% (See Table 1)



Supply current: 3mA typical



Temperature stability:

1.5% max (-40C to 85C)



Vdd stability:

0.5% max (4.75V to 5.25V)

FUNCTIONAL DESCRIPTION

The 3D7438 device is a versatile 8-bit programmable monolithic delay

line. The input (IN) is reproduced at the output (OUT) without inversion,

shifted in time as per the user selection. Delay values, programmed

either via the serial or parallel interface, can be varied over 255 equal

steps according to the formula:

delay. The device features both rising- and falling-edge accuracy.

The all-CMOS 3D7438 integrated circuit has been designed as a reliable, economic alternative to hybrid

TTL programmable delay lines. It is offered in a standard surface mount 16-pin SOL. An 8-pin SOIC

package is available for applications where the parallel interface is not needed. Similarly, a 14-pin SOIC is

offered for applications where the serial interface is not needed.

TABLE 1: PART NUMBER SPECIFICATIONS

PART

DELAYS AND TOLERANCES

INPUT RESTRICTIONS

NUMBER

Inherent

Delay (ns)

Delay

Range (ns)

Delay

Step (ps)

Max Freq

(Addr=0)

Max Freq

(Addr=255)

Min P.Width

(Addr=0)

Min P.Width

(Addr=255)

3D7438x-50

7.0

 0.5

12.750

 .05

50

 25

150 MHz

98 MHz

3.3 ns

5.1 ns

3D7438x-60

7.0

 0.5

15.300

 .06

60

 30

150 MHz

82 MHz

3.3 ns

6.1 ns

3D7438x-75

7.0

 0.5

19.125

 .08

75

 38

150 MHz

65 MHz

3.3 ns

7.6 ns

3D7438x-80

7.0

 0.5

20.400

 .08

80

 40

150 MHz

61 MHz

3.3 ns

8.1 ns

3D7438x-100

7.0

 0.5

25.500

 .10

100

 50

150 MHz

49 MHz

3.3 ns

10.0 ns

3D7438x-125

7.0

 0.5

31.875

 .13

125

 63

150 MHz

39 MHz

3.3 ns

12.7 ns

3D7438x-150

7.0

 0.5

38.250

 .15

150

 75

150 MHz

32 MHz

3.3 ns

15.3 ns

3D7438x-200

7.0

 0.5

51.000

 .20

200

 100

150 MHz

24 MHz

3.3 ns

20.4 ns

3D7438x-250

7.0

 0.5

63.750

 .25

250

 125

150 MHz

19 MHz

3.3 ns

25.5 ns

NOTES: Replace the ‘x’ in the part number with D, S or Z, depending on choice of package.

Any dash number between 50 and 250 not shown is also available as standard.

See application notes section for more details

2010 Data Delay Devices

PIN DESCRIPTIONS

IN

Signal Input

OUT

Signal Output

MD

Mode Select

AE

Address Enable

P0-P7 Parallel Data Input

SC

Serial Clock

SI

Serial Data Input

SO

Serial Data Output

VDD

+5 Volts

GND

Ground

1

2

3

4

8

7

6

5

IN

SO

AE

GND

VDD

OUT

SC

SI

3D7438Z-xx SOIC8

3D7438D-xx SOIC14

1

2

3

4

5

6

7

14

13

12

11

10

9

8

IN

AE

P0

P1

P2

P3

GND

VDD

OUT

P7

P6

P5

P4

GND

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

IN

AE

SO/P0

P1

P2

P3

P4

GND

VDD

OUT

MD

P7

P6

SC

P5

SI

3D7438S-xx SOW16

Super-Fine Resolution