鈥?/div>
TRIG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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
A1
A2
VCC
A3
A4
A5
VCC
N/C
N/C
VCC
N/C
A6
N/C
N/C
data
3
廬
delay
devices,
inc.
PACKAGES
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
N/C
N/C
GND
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 T
2
L fan-out capability
Fits standard 40-pin DIP socket
Auto-insertable
PPG38F-xx
DIP
PPG38F-xxC5
Gull-Wing
PPG38F-xxM
Military DIP
PPG38F-xxMC5
Military Gull-Wing
FUNCTIONAL DESCRIPTION
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:
PW
A
= PW
0
+ T
INC
* A
PIN DESCRIPTIONS
TRIG
OUT
OUT/
A0-A7
RES
VCC
GND
Trigger Input
Non-inverted Output
Inverted Output
Address Bits
Reset
+5 Volts
Ground
where A is the address code, T
INC
is the incremental pulse width of the
device, and PW
0
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
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Programmed pulse width tolerance:
5% or 2ns,
whichever is greater
Inherent width (PW
0
):
20ns typical
Inherent delay (T
TO
):
10ns
鹵
2ns
Operating temperature:
0擄 to 70擄 C
Supply voltage V
CC
:
5VDC
鹵
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
鹵
.3
1
鹵
.5
2
鹵
.5
5
鹵
1.5
10
鹵
2.0
20
鹵
2.0
50
鹵
2.5
100
鹵
5.0
200
鹵
10.0
400
鹵
20.0
Total Width
Change (ns)
127.5
鹵
6.4
255
鹵
12.8
510
鹵
25.5
1,275
鹵
63.8
2,550
鹵
127.5
5,100
鹵
255.0
12,750
鹵
637.5
25,500
鹵
1275
51,000
鹵
2550
102,000
鹵
5100
NOTE: Any dash number between .5 and 400 not
shown is also available.
漏
1997 Data Delay Devices
Doc #97007
1/15/97
Powered by ICminer.com Electronic-Library Service CopyRight 2003
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
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