design notes
The LVQ "Space Saver Series" Logic Delay Modules developed by
Engineered Components Company have been designed to provide
precise delays with required driving and pick-off circuitry contained in
a single 8-pin package compatible with low voltage (3.3V) T2L
circuits. These logic delay modules are of hybrid construction utilizing
the proven technologies of active integrated circuitry and of passive
networks utilizing capacitive, inductive and resistive elements. The
MTBF on these modules, when calculated per MIL-HDBK-217 for a
50
o
C ground fixed environment, is in excess of 4 million hours. Module
design includes compensation for propagation delays and incorpo-
rates internal termination at the output; no additional external compo-
nents are needed to obtain the specified delay.
The SSLDM-LVQ is offered in 20 delays from 8 to 150ns with
each module incorporating total output and two (2) taps. Delay
tolerances are maintained as shown in the accompanying part
number table, when tested under the "Test Conditions" shown.
•
•
•
•
•
•
•
T2L LV CMOS input and outputs
Delays stable and precise
8-pin Space Saver package
Leads - thru-hole, J, Gull Wing or Tucked
Available in delays from 8 to 150ns
Output and 2 intermediate taps each
isolated and with 12mA output drive capability
Fast rise time on all outputs
Delay time is measured at the +1.5V level on the leading
edge. Outputs are capable of driving ±12mA. Tempera-
ture coefficient of delay is approximately +1200 ppm/
o
C over
the operating temperature range of -40 to +85
o
C.
These modules accept either logic "1" or logic "0" inputs and
reproduce the logic at the output without inversion. The delay
modules are intended primarily for use with positive going
pulses and are calibrated to the tolerances shown in the table
on rising edge delay; where best accuracy is desired in appli-
cations using falling edge timing, it is recommended that a
special unit be calibrated for the specific application.
These LVQ "Space Saver Series" modules are packaged in
an 8-pin housing, molded of flame-proof Diallyl Phthalate per
MIL-M-14, Type SDG-F, and are fully encapsulated in epoxy
resin. Thru-hole, J, Gull Wing or Tucked Lead configurations
are available on these modules (see Part Number Table note
to specify). Leads meet the solderability requirements of MIL-
STD-202, Method 208. Corner standoffs on the housing of the
thru-hole lead version and lead design of the surface mount
versions provide positive standoff from the printed circuit
board to permit solder-fillet formation and flush cleaning of
solder-flux residues for improved reliability.
Marking consists of manufacturer's name, logo (EC2), part
number, terminal identification and date code of manufacture.
All marking is applied by silk screen process using white epoxy
paint in accordance with MIL-STD-130, to meet the perma-
nency of identification required by MIL-STD-202, Method 215.
BLOCK DIAGRAM IS SHOWN BELOW
Vcc
8
TAP 1
7
TAP 2
6
OUTPUT
5
TEST CONDITIONS
1. All measurements are made at 25
o
C.
2. V
cc
supply voltage is maintained at 3.3V DC.
3. All units are tested using a LVQ gate providing a positive input
pulse and one LVQ gate load at the output being tested.
4. Input pulse width used is 5 to 10ns longer than delay of module
under test; spacing between pulses (falling edge to rising edge)
is three times the pulse width used
.
X
X
INPUT
DRIVER
X
DELAY LINE WITH
LVQ PICKOFF
OPERATING SPECIFICATIONS
*
V
cc
supply voltage:
. . . . . . . . . . . .
V
cc
supply current:
Constant "0" or "1" in
. . . . . . . . . . . .
1MHz square wave input
. . . . . . . . .
Logic 1 Input:
Voltage
. . . . . . . . . . . . . . . . .
Current
. . . . . . . . . . . . . . . . .
Logic 0 Input:
Voltage
. . . . . . . . . . . . . . . . .
Current
. . . . . . . . . . . . . . . . .
Logic 1 Voltage out:
2.7 to 3.6V DC
1µA max.
1mA typical
2V min.; V
cc
max.
Vcc max.; 1µA max.
.8V max.
1µA max.
2.2V min.; Vcc3.0;
I
OH
-12mA
.4V max. I
OL
+12mA
-40 to +85
o
C
55 to +125
o
C.
1
INPUT
4
GROUND
MECHANICAL DETAIL IS SHOWN BELOW
Pin No.
8
7
6
5
V
1
2
OUT
...........
IN
Pin No.
1
C
4
Logic 0 Voltage out:
. . . . . . . . . . .
Operating temperature range:
. . . . . .
Storage temperature:
. . . . . . . . . . .
*
Delays increase or decrease approximately 2% for a respective
increase or decrease of 10% in supply voltage.
PART NUMBER TABLE
Suffix Part Number with G (for Gull Wing Lead), J (for J Lead), F
(for Thru-hole Lead) or T (for Tucked Lead). Examples: SSLDM-
LVQ-10G (Gull Wing), SSLDM-LVQ-25J (J Lead), SSLDM-LVQ-75F
(Thru-hole Lead) or SSLDM-LVQ-12T (Tucked Lead).
¯
DELAYS AND TOLERANCES (in ns)
Thru-hole Lead
PART NUMBER
SSLDM-LVQ-8
SSLDM-LVQ-9
SSLDM-LVQ-10
SSLDM-LVQ-12
SSLDM-LVQ-14
SSLDM-LVQ-16
SSLDM-LVQ-18
SSLDM-LVQ-20
SSLDM-LVQ-24
SSLDM-LVQ-27
SSLDM-LVQ-30
SSLDM-LVQ-36
SSLDM-LVQ-45
SSLDM-LVQ-60
SSLDM-LVQ-75
SSLDM-LVQ-90
SSLDM-LVQ-105
SSLDM-LVQ-120
SSLDM-LVQ-135
SSLDM-LVQ-150
TAP1
6±1
6±1
6±1
6±1
6±1
6±1
6±1
6±1
8±1
9±1
10±1
12±1
15±1
20±1
25±1
30±1.5
35±1.5
40±1.5
45±2
50±2
TAP2
7±1
7.5±1
8±1
9±1
10±1
11±1
12±1
13±1
16±1
18±1
20±1
24±1
30±1
40±1
50±2
60±2.5
70±2.5
80±3
90±3
100±3
OUTPUT
8±1
9±1
10±1
12±1
14±1
16±1
18±1
20±1
24±1
27±1
30±1
36±1
45±1
60±1
75±2.5
90±3
105±3
120±4
135±4
150±5
Gull Wing Lead
J Lead
All modules can be operated with a minimum input pulse width of
100% of full delay or 15ns whichever is greater and pulse period
approaching square wave; since delay accuracies may be some-
what degraded, it is suggested that the module be evaluated
under the intended specific operating conditions.
Special mod-
ules can be readily manufactured to improve accuracies and/or
provide customer specified delay times for specific applications.
Tucked Lead
Catalog No. C/022197R
工业自动化与控制
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
