CBT3257A
Quad 1-of-2 multiplexer/demultiplexer
Rev. 5 — 4 April 2013
Product data sheet
1. General description
The CBT3257A 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 nB1 and nB2
outputs for the nA input data.
The CBT3257A is characterized for operation from
40 C
to +85
C.
2. Features and benefits
5
switch connection between two ports
TTL-compatible input levels
Minimal propagation delay through the switch
Latch-up protection exceeds 100 mA per JEDEC standard JESD78 class II level A
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
CDM JESD22-C101E exceeds 1000 V
Multiple package options
Specified from
40 C
to +85
C
Nexperia
CBT3257A
Quad 1-of-2 multiplexer/demultiplexer
3. Ordering information
Table 1.
Ordering information
Temperature range
40 C
to +85
C
40 C
to +85
C
40 C
to +85
C
40 C
to +85
C
40 C
to +85
C
Package
Name
CBT3257AD
CBT3257ADB
CBT3257ADS
CBT3257APW
CBT3257ABQ
SO16
SSOP16
SSOP16
[1]
TSSOP16
DHVQFN16
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic shrink small outline package; 16 leads;
body width 5.3 mm
plastic shrink small outline package; 16 leads;
body width 3.9 mm; lead pitch 0.635 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5
3.5
0.85 mm
Version
SOT109-1
SOT338-1
SOT519-1
SOT403-1
SOT763-1
Type number
[1]
Also known as QSOP16.
4. Functional diagram
4
2
1A
1B1
3
1B2
2A
7
5
2B1
6
2B2
3A
9
11
3B1
10
3B2
4A
12
14
4B1
13
4B2
S
1
OE
15
002aab779
Fig 1.
Logic diagram
CBT3257A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 5 — 4 April 2013
2 of 17
Nexperia
CBT3257A
Quad 1-of-2 multiplexer/demultiplexer
5. Pinning information
5.1 Pinning
CBT3257A
S
1B1
1B2
1A
2B1
2B2
2A
GND
1
2
3
4
5
6
7
8
001aai364
16 V
CC
15 OE
14 4B1
13 4B2
12 4A
11 3B1
10 3B2
9
3A
S
1B1
1B2
1A
2B1
2B2
2A
GND
1
2
3
4
5
6
7
8
001aai365
CBT3257A
16 V
CC
15 OE
14 4B1
13 4B2
12 4A
11 3B1
10 3B2
9
3A
Fig 2.
Pin configuration SOT109-1 (SO16) and
SOT519-1 (SSOP16)
Fig 3.
Pin configuration SOT338-1 (SSOP16) and
SOT403-1 (TSSOP16)
CBT3257A
terminal 1
index area
1B1
1B2
1A
2B1
2B2
2A
2
3
4
5
6
7
8
GND
3A
9
GND
(1)
16 V
CC
15 OE
14 4B1
13 4B2
12 4A
11 3B1
10 3B2
S
1
001aai366
Transparent top view
(1) This is not a supply pin. The substrate is attached to this pad using conductive die attach material. There is no electrical or
mechanical requirement to solder this pad. However, if it is soldered, the solder land should remain floating or be connected to
GND.
Fig 4.
Pin configuration SOT763-1 (DHVQFN16)
CBT3257A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 5 — 4 April 2013
3 of 17
Nexperia
CBT3257A
Quad 1-of-2 multiplexer/demultiplexer
5.2 Pin description
Table 2.
Symbol
S
1B1, 2B1, 3B1, 4B1,
1B2, 2B2, 3B2, 4B2
1A, 2A, 3A, 4A
GND
OE
V
CC
Pin description
Pin
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
15
16
Description
select control input
B1 outputs/inputs
B2 outputs/inputs
A inputs/outputs
ground (0 V)
output enable (active LOW)
positive supply voltage
6. Functional description
Table 3.
Function selection
H = HIGH voltage level; L = LOW voltage level; X = Don’t care.
Inputs
OE
L
L
H
S
L
H
X
nA to nB1
nA to nB2
switch off
Switch
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
V
CC
V
I
I
SW
I
IK
T
stg
P
tot
supply voltage
input voltage
switch current
input clamping current
storage temperature
total power dissipation
T
amb
=
40 C
to +85
C
SO16 package
SSOP16 package
TSSOP16 package
DHVQFN16 package
[1]
[2]
[3]
[4]
[2]
[3]
[3]
[4]
[1]
Conditions
Min
0.5
0.5
-
50
65
-
-
-
-
Max
+7.0
+7.0
128
+150
500
500
500
500
Unit
V
V
mA
mA
C
mW
mW
mW
mW
continuous current through each switch
V
I
< 0 V
The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
For SO16 package: P
tot
derates linearly with 8 mW/K above 70
C.
For SSOP16 and TSSOP16 package: P
tot
derates linearly with 5.5 mW/K above 70
C.
For DHVQFN16 package: P
tot
derates linearly with 4.5 mW/K above 70
C.
CBT3257A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 5 — 4 April 2013
4 of 17
Nexperia
CBT3257A
Quad 1-of-2 multiplexer/demultiplexer
8. Recommended operating conditions
Table 5.
Operating conditions
All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation.
Symbol
V
CC
V
IH
V
IL
T
amb
Parameter
supply voltage
HIGH-level input voltage
LOW-level input voltage
ambient temperature
operating in free-air
Conditions
Min
4.5
2.0
-
40
Max
5.5
-
0.8
+85
Unit
V
V
V
C
9. Static characteristics
Table 6.
Static characteristics
T
amb
=
40
C to +85
C.
Symbol
V
IK
V
pass
I
I
I
CC
I
CC
C
I
C
io(off)
R
ON
Parameter
input clamping voltage
pass voltage
input leakage current
supply current
additional supply current
input capacitance
off-state input/output capacitance
ON resistance
Conditions
V
CC
= 4.5 V; I
I
=
18
mA
V
I
= V
CC
= 5.0 V; I
O
=
100 A
V
CC
= 5.5 V; V
I
= GND or 5.5 V
V
CC
= 5.5 V; I
O
= 0 mA;
V
I
= V
CC
or GND
per input; V
CC
= 5.5 V; one input at
3.4 V, other inputs at V
CC
or GND
control pins; V
I
= 3 V or 0 V
A port; V
O
= 3 V or 0 V; OE = V
CC
B port; V
O
= 3 V or 0 V; OE = V
CC
V
CC
= 4.5 V
V
I
= 0 V; I
I
= 64 mA
V
I
= 0 V; I
I
= 30 mA
V
I
= 2.4 V; I
I
= 15 mA
[1]
[2]
[3]
All typical values are measured at V
CC
= 5 V; T
amb
= 25
C.
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.
Measured by the voltage drop between the nA and the nBn terminals at the indicated current through the switch. The lowest voltage of
the two (nA or nBn) terminals determines the ON resistance.
[3]
[2]
Min
-
3.6
-
-
-
-
-
-
-
-
-
Typ
[1]
-
3.9
-
-
-
3.3
9.9
6.4
5
5
10
Max
1.2
4.2
1
3
2.5
-
-
-
7
7
15
Unit
V
V
A
A
mA
pF
pF
pF
CBT3257A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 5 — 4 April 2013
5 of 17
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