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
N/C
OUT
OUT/
N/C
RES
N/C
N/C
VCC
A0
A1
A2
N/C
N/C
N/C
N/C
N/C
A4
N/C
VCC
data
3
廬
delay
devices,
inc.
PACKAGES
N/C
N/C
N/C
N/C
N/C
N/C
GND
N/C
N/C
GND
A3
A5
A6
A7
GND
A8
A9
A10
A11
Digitally programmable in 4096 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
PPG312F-xx
DIP
PPG312F-xxC5
Gull-Wing
PPG312F-xxM
Military DIP
PPG312F-xxMC5
Military Gull-Wing
FUNCTIONAL DESCRIPTION
The PPG312F-series device is a 12-bit digitally programmable pulse
generator. The width, PW
A
, depends on the address code (A11-A0)
according to the following formula:
PW
A
= PW
0
+ T
INC
* A
PIN DESCRIPTIONS
TRIG Trigger Input
OUT Non-inverted Output
OUT/ Inverted Output
A0-A11 Address Bits
RES
Reset
VCC +5 Volts
GND 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>
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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
= 200ma typical
DASH NUMBER SPECIFICATIONS
Part
Number
PPG312F-.5
PPG312F-1
PPG312F-2
PPG312F-5
PPG312F-10
PPG312F-20
PPG312F-50
PPG312F-100
PPG312F-200
PPG312F-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 (us)
2.048
鹵
0.10
4.096
鹵
0.20
8.192
鹵
0.41
20.48
鹵
1.02
40.96
鹵
2.05
81.92
鹵
4.10
204.8
鹵
10.2
409.6
鹵
20.5
819.2
鹵
41.0
1,638.4
鹵
81.9
NOTE: Any dash number between .5 and 400 not
shown is also available.
漏
1997 Data Delay Devices
Doc #97008
1/15/97
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
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