3D7438 Datasheet, PDF (1/6 Pages) Data Delay Devices, Inc. – MONOLITHIC 8-BIT PROGRAMMABLE DELAY LINE (SERIES 3D7438)

MONOLITHIC 8-BIT
PROGRAMMABLE DELAY LINE
(SERIES 3D7438) ^{Super-Fine Resolution}
3D7438
FEATURES
 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)
PACKAGES
IN 1
AE 2
SO/P0 3
P1 4
P2 5
P3 6
P4 7
GND 8
16 VDD
15 OUT
14 MD
13 P7
12 P6
11 SC
10 P5
9 SI
3D7438S-xx SOW16
IN
SO
AE
GND
1 8 VDD
2 7 OUT
3 6 SC
4 5 SI
3D7438Z-xx SOIC8
IN
AE
P0
P1
P2
P3
GND
1 14
2 13
3 12
4 11
5 10
69
78
VDD
OUT
P7
P6
P5
P4
GND
3D7438D-xx SOIC14
For mechanical dimensions, click here.
For package marking details, click here.
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
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:
T_i,nom = T_inh + i * T_inc
where i is the programmed address, T_inc is the delay increment (equal
to the device dash number), and T_inh is the inherent (address zero)
delay. The device features both rising- and falling-edge accuracy.
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
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
NUMBER
3D7438x-50
3D7438x-60
3D7438x-75
3D7438x-80
3D7438x-100
3D7438x-125
3D7438x-150
3D7438x-200
3D7438x-250
DELAYS AND TOLERANCES
Inherent Delay
Delay
Delay (ns) Range (ns) Step (ps)
7.0  0.5 12.750  .05
50  25
7.0  0.5 15.300  .06
60  30
7.0  0.5 19.125  .08
75  38
7.0  0.5 20.400  .08
80  40
7.0  0.5 25.500  .10 100  50
7.0  0.5 31.875  .13 125  63
7.0  0.5 38.250  .15 150  75
7.0  0.5 51.000  .20 200  100
7.0  0.5 63.750  .25 250  125
Max Freq
(Addr=0)
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
INPUT RESTRICTIONS
Max Freq Min P.Width
(Addr=255) (Addr=0)
98 MHz
3.3 ns
82 MHz
3.3 ns
65 MHz
3.3 ns
61 MHz
3.3 ns
49 MHz
3.3 ns
39 MHz
3.3 ns
32 MHz
3.3 ns
24 MHz
3.3 ns
19 MHz
3.3 ns
Min P.Width
(Addr=255)
5.1 ns
6.1 ns
7.6 ns
8.1 ns
10.0 ns
12.7 ns
15.3 ns
20.4 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
Doc #10004
DATA DELAY DEVICES, INC.
1
7/8/2010
3 Mt. Prospect Ave. Clifton, NJ 07013