defining a degree of excellence
Cat 28-R2
.300
5 TAP LEADING EDGE CONTROL
PRECISE DELAY MODULES
.300
7 2 6
3
5
.325
.285 Max
.375
.350
bel
(DC)
(P/N)
.10 Typ
.50 Max
Vcc 8
In 1
bel
.10 Typ
*
(DC)
(P/N)
.285 Max
Gnd 4
.50 Max
.015
.004
4
o
.22 Max
.018
Coplanarity + .002
.23 Max
.012
.008
.012
.008
100
o
90
o
.20 Max
.015 Min
.045
.030
.12 Min
.018
Part Numbers
SMD
S493-0025-02
S493-0030-02
S493-0035-02
S493-0040-02
S493-0045-02
S493-0050-02
S493-0060-02
S493-0070-02
S493-0080-02
S493-0090-02
S493-0100-02
S493-0125-02
S493-0150-02
Thru-Hole
A493-0025-02
A493-0030-02
A493-0035-02
A493-0040-02
A493-0045-02
A493-0050-02
A493-0060-02
A493-0070-02
A493-0080-02
A493-0090-02
A493-0100-02
A493-0125-02
A493-0150-02
Total
Delay
25 ns
30 ns
35 ns
40 ns
45 ns
50 ns
60 ns
70 ns
80 ns
90 ns
100 ns
125 ns
150 ns
Delay
per Tap
5 ns
6 ns
7 ns
8 ns
9 ns
10 ns
12 ns
14 ns
16 ns
18 ns
20 ns
25 ns
30 ns
Rise
Time
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
Ein
Trin
PW
PP
Iccl
Vcc
Test Conditions @ 25
o
C
Pulse Voltage
Rise Time
Pulse Width
Pulse Period
Supply Current
Supply Voltage
3.2 Volts
3.0 ns (10%-90%)
1.2 x Total Delay
4 x Pulse Width
35 ma Typical
5.0 Volts
Electrical Characteristics
Vcc
Vih
Vil
Ioh
Iol
Voh
Vol
Vik
Iih
Iil
Ios
Icch
Iccl
Ta
PW
d
Tc
Supply Voltage
Logic 1 Input Voltage
Logic 0 Input Voltage
Logic 1 Output Current
Logic 0 Output Current
Logic 1 Output Voltage
Logic 0 Output voltage
Input Clamp Voltage
Logic 1 Input Current
Logic 0 Input Current
Short Circuit Output Current
Logic 1 Supply Current
Logic 0 Supply Current
Operating Free Air Temperature
Min. Input Pulse Width of Total Delay
Maximum Duty Cycle
Min.
4.75
2.0
Max.
5.25
0.8
-1
20
2.7
0.5
-1.2
20
-0.6
-150
25
40
70
o
50
Units
V
V
V
ma
ma
V
V
V
ua
ma
ma
ma
ma
C
%
%
Tolerances
Input to Taps + 1 ns or 3 % , Whichever is Greater
Delays measured @ 1.5 V levels on Leading Edge only
with no loads on Taps
Rise and Fall Times measured from 0.75 V to 2.4 V levels
-60
0
o
40
Drive Capabilities
Nh Logic 1 Fanout
Nl Logic 0 Fanout
-
-
20 TTL Loads Max.
10 TTL Loads Max.
Temp. Coeff. of Total Delay (TD) 100 + (25000/TD) PPM/
O
C
Notes
Transfer molded for better reliability
Compatible with TTL & DTL circuits
Terminals: Electro-Tin plate phosphor bronze
Performance warranty is limited to specified parameters listed
SMD - Tape & Reel available:
24mm Wide x 12mm Pitch, 750 pieces per 13" reel
Recommended Temperature Profile
300
o
C
200
o
C
100
o
C
Temp.
Infra Red
225
o
C Max Temp.
> 185
o
C
for 90 Seconds Max
0
2
4
6
Ti m e i n M i n u t e s
8
Other Delays and Tolerances Available
Consult Sales
Specifications subject to change without notice.
Corporate Office
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302-4496
Tel: 201-432-0463
Fax: 201-432-9542
E-Mail: BelFuse@belfuse.com
Internet: http://www.belfuse.com
Far East Office
Bel Fuse Ltd.
8F/8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel: 852-2328-5515
Fax: 852-2352-3706
European Office
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Preston PR1 8UD
Lancashire, U.K.
Tel: 44-1772-556601
Fax: 44-1772-888366
8
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