PPG38F Datasheet, PDF (1/5 Pages) Data Delay Devices, Inc. – 8-BIT PROGRAMMABLE PULSE GENERATOR (SERIES PPG38F)

8-BIT PROGRAMMABLE
PULSE GENERATOR
(SERIES PPG38F)
PPG38F
data
delay
3
®
devices, inc.
FEATURES
• 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
• Fits standard 40-pin DIP socket
• Auto-insertable
TRIG 1
N/C 2
OUT 3
GND 4
N/C 5
N/C 6
RES 7
GND 8
N/C 9
N/C 10
N/C 11
GND 12
N/C 13
N/C 14
N/C 15
GND 16
A7 17
N/C 18
N/C 19
GND 20
PACKAGES
40 VCC
39 OUT/
38 N/C
37 N/C
36 VCC
35 A0
34 A1
33 A2
32 VCC
31 A3
30 A4
29 A5
28 VCC
27 N/C
26 N/C
25 VCC
24 N/C
23 A6
22 N/C
21 N/C
PPG38F-xx
DIP
PPG38F-xxC5
Gull-Wing
PPG38F-xxM
Military DIP
PPG38F-xxMC5
Military Gull-Wing
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
The PPG38F-series device is a 8-bit digitally programmable pulse
generator. The width, PW_A, depends on the address code (A7-A0)
according to the following formula:
TRIG Trigger Input
OUT Non-inverted Output
OUT/ Inverted Output
A0-A7 Address Bits
PW_A = PW₀ + T_INC * A
RES Reset
VCC +5 Volts
where A is the address code, T_INC is the incremental pulse width of the
GND Ground
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.
SERIES SPECIFICATIONS
• Programmed pulse width tolerance: 5% or 2ns,
whichever is greater
• Inherent width (PW₀): 20ns typical
• Inherent delay (T_TO): 10ns ± 2ns
• Operating temperature: 0° to 70° C
• Supply voltage V_CC: 5VDC ± 5%
• Supply current: I_CC = 80ma typical
DASH NUMBER SPECIFICATIONS
Part
Number
PPG38F-.5
PPG38F-1
PPG38F-2
PPG38F-5
PPG38F-10
PPG38F-20
PPG38F-50
PPG38F-100
PPG38F-200
PPG38F-400
Incremental Width
Per Step (ns)
.5 ± .3
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
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
NOTE: Any dash number between .5 and 400 not
shown is also available.
©1997 Data Delay Devices
Doc #97007
DATA DELAY DEVICES, INC.
1
1/15/97
3 Mt. Prospect Ave. Clifton, NJ 07013