PPG38F
Ò
8-BIT PROGRAMMABLE
PULSE GENERATOR
(SERIES PPG38F)
data
delay
3
devices, inc.
FEATURES
PACKAGES
TRIG
N/C
OUT
GND
N/C
N/C
RES
GND
N/C
N/C
N/C
GND
N/C
N/C
N/C
GND
A7
1
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VCC
OUT/
N/C
N/C
VCC
A0
2
·
·
·
·
·
·
·
·
·
Digitally programmable in 256 steps
Monotonic pulse-width-vs-address variation
Rising edge triggered
Two separate outputs: inverting & non-inverting
Precise and stable pulse width
Input & outputs fully TTL interfaced & buffered
10 T2L fan-out capability
3
4
PPG38F-xx
DIP
PPG38F-xxC5
Gull-Wing
PPG38F-xxM
Military DIP
PPG38F-xxMC5
5
6
A1
7
8
A2
VCC
A3
9
10
11
12
13
14
15
16
17
18
19
20
A4
A5
Fits standard 40-pin DIP socket
Auto-insertable
VCC
N/C
N/C
VCC
N/C
A6
Military Gull-Wing
N/C
N/C
GND
N/C
N/C
PIN DESCRIPTIONS
FUNCTIONAL DESCRIPTION
TRIG Trigger Input
OUT Non-inverted Output
OUT/ Inverted Output
A0-A7 Address Bits
RES Reset
The PPG38F-series device is a 8-bit digitally programmable pulse
generator. The width, PWA, depends on the address code (A7-A0)
according to the following formula:
PWA = PW0 + TINC * A
VCC +5 Volts
GND Ground
where A is the address code, TINC is the incremental pulse width of the
device, and PW0 is the inherent pulse width of the device. The
incremental width is specified by the dash number of the device and can range from 0.5ns through 400ns,
inclusively. RESET is held LOW during normal operation. When it is brought HIGH, OUT and OUT/ are
forced into LOW and HIGH states, respectively, and the unit is ready for the next trigger input. The
address is not latched and must remain asserted while the output pulse is active.
DASH NUMBER SPECIFICATIONS
SERIES SPECIFICATIONS
Part
Number
Incremental Width
Per Step (ns)
.5 ± .3
Total Width
Change (ns)
127.5 ± 6.4
255 ± 12.8
510 ± 25.5
1,275 ± 63.8
2,550 ± 127.5
5,100 ± 255.0
12,750 ± 637.5
25,500 ± 1275
51,000 ± 2550
102,000 ± 5100
·
Programmed pulse width tolerance: 5% or 2ns,
whichever is greater
PPG38F-.5
PPG38F-1
PPG38F-2
PPG38F-5
PPG38F-10
PPG38F-20
PPG38F-50
PPG38F-100
PPG38F-200
PPG38F-400
·
·
·
·
·
Inherent width (PW0):20ns typical
Inherent delay (TTO): 10ns ± 2ns
Operating temperature: 0° to 70° C
Supply voltage VCC: 5VDC ± 5%
Supply current: ICC = 80ma typical
1 ± .5
2 ± .5
5 ± 1.5
10 ± 2.0
20 ± 2.0
50 ± 2.5
100 ± 5.0
200 ± 10.0
400 ± 20.0
NOTE: Any dash number between .5 and 400 not
shown is also available.
Ó1997 Data Delay Devices
Doc #97007
1/15/97
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1