CBT3125
Quadruple FET bus switch
Rev. 2 — 1 October 2018
Product data sheet
1. General description
The CBT3125 quadruple FET bus switch features independent line switches. Each switch is
disabled when the associated output enable (nOE) input is HIGH.
2. Features and benefits
•
•
•
•
•
Standard ’125’-type pinout
5 Ω switch connection between two ports
TTL-compatible input levels
Latch-up performance exceeds 500 mA per JESD78
ESD protection:
•
HBM JESD22-A114 exceeds 2000 V
•
MM JESD22-A115 exceeds 200 V
•
CDM JESD22-C101 exceeds 1000 V
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
CBT3125D
CBT3125DB
CBT3125PW
-40 °C to +85 °C
-40 °C to +85 °C
-40 °C to +85 °C
Name
SO14
SSOP14
TSSOP14
Description
plastic small outline package; 14 leads;
body width 3.9 mm
plastic shrink small outline package; 14 leads;
body width 5.3 mm
plastic thin shrink small outline package; 14 leads;
body width 4.4 mm
Version
SOT108-1
SOT337-1
SOT402-1
Nexperia
CBT3125
Quadruple FET bus switch
4. Functional diagram
1A
1OE
2A
2OE
3A
3OE
4A
4OE
2
1
5
4
9
10
12
13
aaa-029119
3
1B
6
2B
8
3B
11
4B
Fig. 1.
Logic diagram
5. Pinning information
5.1. Pinning
CBT3125
1OE
1A
1B
2OE
2A
2B
GND
1
2
3
4
5
6
7
aaa-029120
14 V
CC
13 4OE
12 4A
11 4B
10 3OE
9
8
3A
3B
1OE
1A
1B
2OE
2A
2B
GND
1
2
3
4
5
6
7
CBT3125
14 V
CC
13 4OE
12 4A
11 4B
10 3OE
9
8
aaa-029121
3A
3B
Fig. 2.
Pin configuration SOT108-1 (SO14)
Fig. 3.
Pin configuration SOT337-1 (SSOP14)
and SOT402-1 (TSSOP14)
5.2. Pin description
Table 2. Pin description
Symbol
1OE, 2OE, 3OE, 4OE
1A, 2A, 3A, 4A
1B, 2B, 3B, 4B
GND
V
CC
Pin
1, 4, 10, 13
2, 5, 9, 12
3, 6, 8, 11
7
14
Description
output enable input (active LOW)
data input
data output
ground (0 V)
supply voltage
CBT3125
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2018. All rights reserved
Product data sheet
Rev. 2 — 1 October 2018
2 / 12
Nexperia
CBT3125
Quadruple FET bus switch
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level.
Output enable input nOE
L
H
Function switch
ON-state (nA = nB)
OFF-state
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134); T
amb
= −40 °C to +85 °C.
Symbol Parameter
V
CC
V
I
I
O
I
IK
T
stg
[1]
Conditions
[1]
V
I/O
< 0 V
Min
-0.5
-0.5
-
-
−65
Max
+7.0
+7.0
128
−50
+150
Unit
V
V
mA
mA
°C
supply voltage
input voltage
output current
input clamping current
storage temperature
The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
8. Recommended operating conditions
Table 5. Operating conditions
Symbol Parameter
V
CC
T
amb
[1]
Conditions
[1]
operating in free air
Min
4.5
-40
Typ
-
-
Max
5.5
+85
Unit
V
°C
supply voltage
ambient temperature
All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation.
CBT3125
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2018. All rights reserved
Product data sheet
Rev. 2 — 1 October 2018
3 / 12
Nexperia
CBT3125
Quadruple FET bus switch
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
IH
V
IL
V
IK
I
I
I
CC
ΔI
CC
LOW-level input voltage
input clamping voltage
input leakage current
supply current
Conditions
nOE
V
CC
= 4.5 V; I
I
= -18 mA
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
[2]
Min
2.0
-
-
-
-
-
Typ
[1]
-
-
-
-
-
-
Max
-
0.8
-1.2
±1
3
2.5
Unit
V
V
V
μA
μA
mA
HIGH-level input voltage nOE
additional supply current nOE; per input pin; V
CC
= 5.5 V;
one input at 3.4 V,
other inputs at V
CC
or GND
pass voltage
input capacitance
off-state input/output
capacitance
ON resistance
V
I
= V
CC
= 5.0 V
nOE; V
I
= 3 V or 0 V
V
O
= 3 V or 0 V; nOE = V
CC
V
CC
= 4.5 V; V
I
= 0 V; I
I
= 64 mA
V
CC
= 4.5 V; V
I
= 0 V; I
I
= 30 mA
V
CC
= 4.5 V; V
I
= 2.4 V; I
I
= −15 mA
V
pass
C
I
C
io(off)
R
ON
-
-
-
[3]
[3]
[3]
-
-
-
3.8
1.7
3.4
5
5
10
-
-
-
7
7
15
V
pF
pF
Ω
Ω
Ω
[1]
[2]
[3]
All typical values are measured at V
CC
= 5 V, unless otherwise noted, 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 level between the nA and the nB terminals at the indicated current through the switch. ON resistance is
determined by the lowest voltage of the two (nA, nB) terminals.
10. Dynamic characteristics
Table 7. Dynamic characteristics
At recommended operating conditions; Voltages are referenced to GND (ground = 0 V). For test circuit see
Fig. 6.
Symbol Parameter
t
pd
t
en
t
dis
[1]
[2]
Conditions
nA to nB; nB to nA; see
Fig. 4
nOE to nA; nOE to nB; see
Fig. 5
nOE to nA; nOE to nB; see
Fig. 5
[1] [2]
[2]
[2]
Min
-
1.0
1.0
Typ
-
-
-
Max
0.25
5.4
4.7
Unit
ns
ns
ns
propagation delay
enable time
disable time
The propagation delay is the calculated RC time constant of the typical ON resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
t
pd
is the same as t
PLH
and t
PHL
.
t
en
is the same as t
PZL
and t
PZH
.
t
dis
is the same as t
PLZ
and t
PHZ
.
CBT3125
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2018. All rights reserved
Product data sheet
Rev. 2 — 1 October 2018
4 / 12
Nexperia
CBT3125
Quadruple FET bus switch
10.1. Waveforms and test circuit
V
I
nA, nB
input
GND
t
PHL
V
OH
nB, nA
output
V
OL
V
M
001aak305
V
M
t
PLH
Measurement points are given in
Table 8.
V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig. 4.
The data input (nA, nB) to output (nB, nA) propagation delay times
V
I
nOE input
GND
t
PLZ
output
LOW to OFF
OFF to LOW
3.5 V
V
M
V
OL
t
PHZ
output
HIGH to OFF
OFF to HIGH
V
OH
V
Y
V
M
GND
outputs
enabled
outputs
disabled
outputs
enabled
001aak298
V
M
V
M
t
PZL
V
X
t
PZH
Measurement points are given in
Table 8.
V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig. 5.
Enable and disable times
Table 8. Measurement points
Supply voltage
Input
V
CC
V
CC
= 5.0 V ± 0.5 V
V
I
GND to 3.0 V
V
M
1.5 V
Output
V
M
1.5 V
V
X
V
OL
+ 0.3 V
V
Y
V
OH
- 0.3 V
CBT3125
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2018. All rights reserved
Product data sheet
Rev. 2 — 1 October 2018
5 / 12
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