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)
Vcc 8
In 1
bel
.10 Typ
*
(DC)
(P/N)
.285 Max
.10 Typ
.50 Max
.22 Max
.018
Coplanarity + .002
.015
.004
4
o
.012
.008
Gnd 4
.50 Max
.23 Max
.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
45
50
60
ns
ns
ns
ns
Delay
per Tap
5 ns
6 ns
7 ns
8
9
10
12
ns
ns
ns
ns
Rise
Time
3 ns
3 ns
3 ns
3
3
3
3
ns
ns
ns
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
%
%
70 ns
80 ns
90 ns
100 ns
125 ns
150 ns
14 ns
16 ns
18 ns
20 ns
25 ns
30 ns
3 ns
3 ns
3 ns
3 ns
3 ns
3 ns
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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