DS1020
Programmable 8-Bit
Silicon Delay Line
www.dalsemi.com
FEATURES
All-silicon time delay
Models with 0.15 ns, 0.25 ns, 0.5 ns, 1 ns,
and 2 ns steps
Programmable using 3-wire serial port or
8-bit parallel port
Leading and trailing edge accuracy
Standard 16-pin DIP or 16-pin SOIC
Economical
Auto-insertable, low profile
Low-power CMOS
TTL/CMOS-compatible
Vapor phase, IR and wave solderable
PIN ASSIGNMENT
IN
1
16
VCC
E
2
15
OUT
Q/PO
3
14
S
P1
4
13
P7
P2
5
12
P6
P3
6
11
C
P4
7
10
P5
GND
8
9
D
DS1020 16-pin DIP (300-mil)
See Mech. Drawings Section
IN
E
Q/PO
P1
P2
P3
P4
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
OUT
S
P7
P6
C
P5
D
DS1020S 16-pin SOIC (300-mil)
See Mech. Drawings Section
PIN DESCRIPTION
IN
P0-P7
GND
OUT
VCC
S
E
C
Q
D
- Delay Input
- Parallel Program Pins
- Ground
- Delay Output
- +5 Volts
- Mode Select
- Enable
- Serial Port Clock
- Serial Data Output
- Serial Data Input
DESCRIPTION
The DS1020 Programmable 8-Bit Silicon Delay Line consists of an 8-bit, user-programmable CMOS
silicon integrated circuit. Delay values, programmed using either the 3-wire serial port or the 8-bit
parallel port, can be varied over 256 equal steps. The fastest model (-15) offers a maximum delay of
48.25 ns with an incremental delay of 0.15 ns, while the slowest model (-200) has a maximum delay of
520 ns with an incremental delay of 2 ns. All models have an inherent (step-zero) delay of 10 ns. After
the user-determined delay, the input logic state is reproduced at the output without inversion. The
DS1020 is TTL- and CMOS-compatible, capable of driving 10 74LS-type loads, and features both rising
and falling edge accuracy.
The all-CMOS DS1020 integrated circuit has been designed as a reliable, economic alternative to hybrid
programmable delay lines. It is offered in a standard 16-pin auto-insertable DIP and a space-saving
surface mount 16-pin SOIC.
1 of 9
111799
