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Philips
Semiconductors
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
Product data
Supersedes data of 27 Sep 2002
2002 Dec 13
INTEGRATED CIRCUITS
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2
2002 Dec 13
FEATURES
5
switch connection between two ports
TTL-compatible input levels
Minimal propagation delay through the switch
Latch-up protection exceeds 500 mA per JESD78
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
DESCRIPTION
The CBT3257 is a quad 1-of-2 high-speed TTL-compatible
multiplexer/demultiplexer. The low on resistance of the switch allows
inputs to be connected to outputs without adding propagation delay
or generating additional ground bounce noise.
Output Enable (OE) and select-control (S) inputs select the
appropriate B1 and B2 outputs for the A-input data.
The CBT3257 is characterized for operation from -40 to +85
C.
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
S
1B1
1B2
1A
2B1
2B2
2A
GND
V
CC
OE
4B1
4B2
4A
3B1
3B2
3A
SA00533
PIN DESCRIPTION
PIN NUMBER
SYMBOL
NAME AND FUNCTION
1
S
Select-control input
2, 3,
5, 6,
10, 11,
13, 14
1B1, 1B2,
2B1, 2B2
3B1, 3B2
4B1, 4B2
B outputs
4, 7, 9, 12
1A, 2A, 3A, 4A
A inputs
8
GND
Ground (0 V)
15
OE
Output enable
16
V
CC
Positive supply voltage
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
TOPSIDE MARK
DWG NUMBER
16-pin plastic SO
-40 to 85
C
CBT3257D
CBT3257D
SOT109-1
16-pin plastic SSOP
-40 to 85
C
CBT3257DB
CT3257
SOT338-1
16-pin plastic SSOP (QSOP)
-40 to 85
C
CBT3257DS
CBT3257
SOT519-1
16-pin plastic TSSOP
-40 to 85
C
CBT3257PW
CBT3257
SOT403-1
Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
3
LOGIC DIAGRAM (positive logic)
4
1A
2
1B1
3
1B2
7
2A
5
2B1
6
2B2
9
3A
11
3B1
10
3B2
12
4A
14
4B1
13
4B2
1
S
15
OE
SA00638
FUNCTION TABLE
INPUTS
OE
S
FUNCTION
L
L
A port = B1 port
L
H
A port = B2 port
H
X
Disconnect
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
4
ABSOLUTE MAXIMUM RATINGS
1
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
CC
DC supply voltage
-0.5 to +7.0
V
V
I
DC input voltage
2
-0.5 to +7.0
V
Continuous channel current
128
mA
I
K
Input clamp current
V
I/O
< 0
-50
mA
T
stg
Storage temperature range
-65 to +150
C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
MIN
MAX
UNIT
V
CC
DC supply voltage
4.5
5.5
V
V
IH
High-level input voltage
2.0
--
V
V
IL
Low-level Input voltage
--
0.8
V
T
amb
Operating free-air temperature range
-40
+85
C
NOTE:
1. All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation.
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
T
amb
= -40 to +85
C
UNIT
MIN
TYP
1
MAX
V
IK
Input clamp voltage
V
CC
= 4.5 V; I
I
= -18 mA
--
--
-1.2
V
V
P
Pass voltage
V
I
= V
CC
= 5.0 V; I/O = -100 mA
3.4
3.6
3.9
V
I
I
Input leakage current
V
CC
= 5.5 V; V
I
= GND or 5.5 V
--
--
1
A
I
CC
Quiescent supply current
V
CC
= 5.5 V; I
O
= 0, V
I
= V
CC
or GND
--
--
3
A
I
CC
Additional supply current per input pin
2
V
CC
= 5.5 V, one input at 3.4 V,
other inputs at V
CC
or GND
--
--
2.5
mA
C
I
Control pins
V
I
= 3 V or 0
--
3.3
--
pF
A port
V
O
= 3 V or 0; OE = V
CC
--
9.9
--
pF
C
IO(OFF)
Power-off leakage current
B port
V
O
= 3 V or 0; OE = V
CC
--
6.4
--
pF
V
CC
= 4.5 V; V
I
= 0V; I
I
= 64 mA
--
5
7
r
on
3
On-resistance
V
CC
= 4.5 V; V
I
= 0V; I
I
= 30 mA
--
5
7
on
V
CC
= 4.5 V; V
I
= 2.4 V; I
I
= 15 mA
--
10
15
NOTES:
1. All typical values are at V
CC
= 5 V, T
amb
= 25
C.
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND
3. Measured by the voltage drop between the A and the B terminals at the indicated current through the switch.
On-state resistance is determined by the lowest voltage of the two (A or B) terminals.
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
5
AC CHARACTERISTICS
T
amb
= -40 to +85
C; C
L
= 50 pF
LIMITS
SYMBOL
PARAMETER
FROM (INPUT)
TO
V
CC
= +5.0 V
0.5 V
UNIT
(OUTPUT)
MIN
MAX
t
pd
Propagation delay
1
A or B
B or A
--
0.25
ns
t
pd
Propagation delay
S
A
1.6
5.0
ns
Output enable time
OE
A or B
1.8
5.1
ns
t
en
Output enable time
to High and Low level
S
B
1.6
5.2
ns
Output disable time
OE
A or B
2.2
5.5
ns
t
dis
Output disable time
from High and Low level
S
B
1.0
5.0
ns
NOTE:
1. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
AC WAVEFORMS
V
M
= 1.5 V, V
IN
= GND to 3.0 V
INPUT
1.5 V
OUTPUT
t
PLH
t
PHL
SA00028
1.5 V
1.5 V
1.5 V
3 V
0 V
V
OH
V
OL
Waveform 1. Input to Output Propagation Delays
Output Control
(Low-level
enabling )
1.5 V
t
PZH
t
PHZ
V
OH
V
OL
t
PZL
t
PLZ
3.5 V
0 V
V
OL
+ 0.3 V
V
OH
- 0.3 V
SA00029
1.5 V
1.5 V
1.5 V
0 V
3 V
Output
Waveform 1
S1 at 7 V
(see Note)
Note:
Waveform 1 is for an output with internal conditions such that
the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that
the output is high except when disabled by the output control.
Output
Waveform 2
S1 at Open
(see Note)
Waveform 2. 3-State Output Enable and Disable Times
NOTES:
1. t
PLZ
and t
PHZ
are the same as t
dis
.
2. t
PZL
and t
PZH
are the same as t
en
.
3. t
PLH
and t
PHL
are the same as t
pd
.
TEST CIRCUIT AND WAVEFORMS
C
L
= 50 pF
500
Load Circuit
DEFINITIONS
C
L
=
Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
TEST
S1
t
pd
open
t
PLZ
/t
PZL
7 V
t
PHZ
/t
PZH
open
SA00012
500
From Output
Under Test
S1
7 V
Open
GND
NOTES:
1. All input pulses are supplied by generators having the following
characteristics: PRR
10 MHz, Z
O
= 50
, t
r
2.5 ns, t
f
2.5 ns.
2. The outputs are measured one at a time with one transition per
measurement.
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
6
SO16:
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
7
SSOP16:
plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
8
SSOP16:
plastic shrink small outline package; 16 leads;
body width 3.9 mm; lead pitch 0.635 mm
SOT519-1
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
9
TSSOP16:
plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
10
REVISION HISTORY
Rev
Date
Description
_2
20021213
Product data (9397 750 10869); ECN 853-2381 29158 of 06 November 2002.
Modifications:
Corrections to Block Diagram graphic.
_1
20020927
Product data (9397 750 10332); ECN 853-2381 28892 of 27 September 2002.
Philips Semiconductors
Product data
CBT3257
Quad 1-of-2 multiplexer/demultiplexer
2002 Dec 13
11
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given
in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no
representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be
expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree
to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes -- Philips Semiconductors reserves the right to make changes in the products--including circuits, standard cells, and/or software--described
or contained herein in order to improve design and/or performance. When the product is in full production (status `Production'), relevant changes will be communicated
via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys
no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent,
copyright, or mask work right infringement, unless otherwise specified.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Koninklijke Philips Electronics N.V. 2002
All rights reserved. Printed in U.S.A.
Date of release: 12-02
Document order number:
9397 750 10869
Philips
Semiconductors
Data sheet status
[1]
Objective data
Preliminary data
Product data
Product
status
[2] [3]
Development
Qualification
Production
Definitions
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
Data sheet status
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Level
I
II
III
Document Outline
- FEATURES
- DESCRIPTION
- PIN CONFIGURATION
- PIN DESCRIPTION
- ORDERING INFORMATION
- LOGIC DIAGRAM
- FUNCTION TABLE
- ABSOLUTE MAXIMUM RATINGS1
- RECOMMENDED OPERATING CONDITIONS
- DC ELECTRICAL CHARACTERISTICS
- AC CHARACTERISTICS
- AC WAVEFORMS
- TEST CIRCUIT AND WAVEFORMS
- PACKAGE OUTLINE
- SOT109-1
- SOT338-1
- SOT519-1
- SOT403-1
- REVISION HISTORY
- Data sheet status
- Definitions
- Disclaimers
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