TEXAS INSTRUMENTS SN74CBT3125 Technical data
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SN74CBT3125
QUADRUPLE FET BUS SWITCH
SCDS021E – MAY 1995 – REVISED MAY 1998
D
Standard ’125-Type Pinout
D
5-Ω Switch Connection Between Two Ports
D
TTL-Compatible Input Levels
D
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB, DBQ), Thin Very Small-Outline (DGV),
and Thin Shrink Small-Outline (PW)
Packages
description
The SN74CBT3125 quadruple FET bus switch
features independent line switches. Each switch
is disabled when the associated output-enable
(OE
) input is high.
The SN74CBT3125 is characterized for operation
from –40°C to 85°C.
FUNCTION TABLE
(each bus switch)
INPUT
OE
L A port = B port
H Disconnect
FUNCTION
D, DB, DGV, OR PW PACKAGE
(TOP VIEW)
1OE
1
1A
2
1B
3
4
2OE
5
2A
6
2B
7
GND
DBQ PACKAGE
(TOP VIEW)
1
NC
2
1OE
3
1A
4
1B
5
2OE
6
2A
7
2B
8
GND
NC – No internal connection
16
15
14
13
12
11
10
14
13
12
11
10
V
CC
4OE
4A
4B
3OE
9
3A
8
3B
V
CC
4OE
4A
4B
3OE
3A
3B
9
NC
logic diagram (positive logic)
2
1A
1
1OE
5
2A
4
2OE
9
3A
10
3OE
12
4A
13
4OE
Pin numbers shown are for the D, DB, DGV, and PW packages.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
3
1B
6
2B
8
3B
11
4B
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1998, Texas Instruments Incorporated
1
SN74CBT3125
¶
on
V
0
QUADRUPLE FET BUS SWITCH
SCDS021E – MAY 1995 – REVISED MAY 1998
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Input voltage range, V
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(see Note 1) –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
†
Continuous channel current 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
Package thermal impedance, θ
(V
< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O
(see Note 2): D package 127°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JA
K
DB package 158°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DBQ package 139°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGV package 182°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package 170°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” 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.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
recommended operating conditions (see Note 3)
MIN MAX UNIT
V
V
V
T
NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Supply voltage 4 5.5 V
CC
High-level control input voltage 2 V
IH
Low-level control input voltage 0.8 V
IL
Operating free-air temperature –40 85 °C
A
Implications of Slow or Floating CMOS Inputs
, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT
V
IK
I
I
I
CC
§
∆I
CC
C
i
C
io(OFF)
r
‡
All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.
§
This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
¶
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 lower voltage of the two (A or B) terminals.
Control inputs VCC = 5.5 V, One input at 3.4 V , Other inputs at VCC or GND 2.5 mA
Control inputs VI = 3 V or 0 3 pF
VCC = 4 V, II = –18 mA –1.2 V
VCC = 5.5 V, VI = 5.5 V or GND ±1 µA
VCC = 5.5 V, IO = 0, VI = VCC or GND 3 µA
VO = 3 V or 0, OE = V
VCC = 4 V,
TYP at VCC = 4 V
VCC = 4.5 V
VI = 2.4 V, II = 15 mA 16 22
=
I
VI = 2.4 V, II = 15 mA 10 15
CC
II = 64 mA 5 7
II = 30 mA 5 7
4 pF
Ω
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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