Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74CBT3126
CMOS IC
QUADRUPLE FET BUS SWITCH

DESCRIPTION
The U74CBT3126 is a quadruple line bus switch. It is composed
of four 1-bit line switchs with independent separate output-enable
(OE) inputs. When OE is low, the switch is disabled.
To ensure the high-impedance state during power up or power
down, OE should be tied to GND through a pull-down resistor and
the minimum value of the resistor is determined by the
current-sourcing capability of the driver.

FEATURES
* 5 Ω switch connection between two ports
* Max tpd of 0.25 ns at 5V
* Low power consumption, ICC = 3 μA (Max.) at 5.5V
* TTL compatible input levels

ORDERING INFORMATION
Ordering Number
U74CBT3126G-S14-R
U74CBT3126G-P14-R

Package
SOP-14
TSSOP-14
Packing
Tape Reel
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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U74CBT3126


PIN CONFIGURATION
1OE
1
14
VCC
1A
2
13
4OE
1B
3
12
4A
2OE
4
11
4B
2A
5
10
3OE
2B
6
9
3A
GND
7
8
3B
FUNCTION TABLE (each bus switch)
INPUT
OE
L
H

CMOS IC
FUNCTION
Z
A=B
LOGIC DIAGRAM (positive logic)
1OE
1A
2OE
2A
3OE
3A
4OE
4A
1
3
2
1B
4
5
2B
10
9
8
3B
13
12
UNISONIC TECHNOLOGIES CO., LTD
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6
11
4B
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U74CBT3126

CMOS IC
ABSOLUTE MAXIMUM RATING (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
VCC
VIN
VCC
VIH
VIL
IIK
ICH
RATINGS
UNIT
-0.5~7
V
-0.5~7
V
4 ~ 5.5
V
High
2
V
Control Input Voltage
0.8
V
Low
Input Clamp Current
-50
mA
Continuous Channel Current
128
mA
SOP-14
Power Dissipation
600
PD
mW
TOPR = -40°C to +125°C
TSSOP-14
500
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Supply Voltage
Input Voltage
Supply Voltage

THERMAL DATA
PARAMETER
Junctions to Ambient

θJA
RATINGS
139
170
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (TA =25°C , VCC = 5 V, unless otherwise specified)
PARAMETER
Digital Input Diode Voltage
Input Leakage Current
(OE inputs)
Quiescent Supply Current
Additional quiescent Supply Current
Input Capacitance (OE)
I/O Capacitance (OFF)
Resistor between two ports

SYMBOL
SOP-14
TSSOP-14
SYMBOL
TEST CONDITIONS
VIK
VCC = 4.5V, II = -18mA
II(LEAK)
ICC
 ICC
CIN
CIO
ron
MIN
TYP MAX UNIT
-1.2
V
VCC = 5.5V, VIN = 5.5V or GND
VCC = 5.5V, VIN = 5.5V or GND, IOUT =
0
VCC = 5.5V, One input at 3.4V,
Other inputs at VCC or GND
VIN = 3V or GND
VOUT = 3V or GND, OE = GND
VCC = 4V, VIN = 2.4V, IIN = 15mA, TYP
at VCC = 4V
VCC = 4.5V, VIN = 0V, IIN = 64mA
VCC = 4.5V, VIN = 0V, IIN = 30mA
VCC = 4.5V, VIN = 2.4V, IIN = 15mA
±1
μA
3
μA
2.5
mA
3
4
pF
pF
16
22
5
5
10
7
7
15
Ω
SWITCHING CHARACTERISTICS (TA =25°C)
PARAMETER
Propagation delay
from input A (or B) to output B (or A)
Propagation delay
from input OE to output A or B
Propagation delay
from input OE to output A or B
SYMBOL
TEST CONDITIONS
tPLH/tPHL
VCC=4V
(tpd)
VCC=5±0.5V
tPZL/tPZH
VCC=4V
CL=50pF, RL=500Ω
(ten)
VCC=5±0.5V
tPLZ/tPHZ
VCC=4V
(tdis)
VCC=5±0.5V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
1.6
1
MAX
0.35
0.25
5.4
5.1
5
4.5
UNIT
ns
ns
ns
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U74CBT3126

CMOS IC
TEST CIRCUIT AND WAVEFORMS
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
VCC
4V
5V±0.5V
Inputs
VIN
VCC
VCC
tr, tf
≤2.5ns
≤2.5ns
VM
VLOAD
CL
RL
V∆
1.5V
1.5V
7V
7V
50pF
50pF
500Ω
500Ω
0.3V
0.3V
UNISONIC TECHNOLOGIES CO., LTD
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S1
Open
VLOAD
Open
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U74CBT3126

CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
0V
tPZL
tPZL
VLOAD/2
Output
VM
S1 at VLOAD
VOL+VΔ
tPHZ
tPZH
Output
S1 at Open
VOL
VM
VOH+VΔ
VOH
0V
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤10MHz, ZO = 50Ω.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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