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SN74CBT3345 Datasheet Preview

SN74CBT3345 Datasheet

8-BIT FET BUS SWITCH

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SN74CBT3345
8ĆBIT FET BUS SWITCH
D Standard ’245-Type Pinout
D 5-Switch Connection Between Two Ports
D TTL-Compatible Input Levels
description/ordering information
The SN74CBT3345 provides eight bits of
high-speed TTL-compatible bus switching in a
standard ’245 device pinout. The low on-state
resistance of the switch allows connections to be
made with minimal propagation delay.
The device is organized as one 8-bit switch bank
with dual output-enable (OE and OE) inputs.
When OE is low or OE is high, the switch is on, and
port A is connected to port B. When OE is high and
OE is low, the switch is open, and the
high-impedance state exists between the two
ports.
SCDS027I − MAY 1995 − REVISED JANUARY 2004
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
OE 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 VCC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SOIC − DW
Tube
Tape and reel
SN74CBT3345DW
SN74CBT3345DWR
CBT3345
SSOP − DB
Tape and reel SN74CBT3345DBR CU345
−40°C to 85°C SSOP (QSOP) − DBQ Tape and reel SN74CBT3345DBQR CBT3345
TSSOP − PW
Tube
Tape and reel
SN74CBT3345PW
SN74CBT3345PWR
CU345
TVSOP − DGV
Tape and reel SN74CBT3345DGVR CU345
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OE
OE
FUNCTION
H
X
A port = B port
X
L
A port = B port
L
H
Disconnect
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.
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 2004, Texas Instruments Incorporated
1




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SN74CBT3345 Datasheet Preview

SN74CBT3345 Datasheet

8-BIT FET BUS SWITCH

No Preview Available !

SN74CBT3345
8ĆBIT FET BUS SWITCH
SCDS027I − MAY 1995 − REVISED JANUARY 2004
logic diagram (positive logic)
2
A1
18
B1
9
A8
1
OE
19
OE
11
B8
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Continuous channel current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Input clamp current, IIK (VI/O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C
DBQ package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68°C
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92°C
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
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 51-7.
recommended operating conditions (see Note 3)
MIN MAX UNIT
VCC Supply voltage
4.5 5.5 V
VIH High-level control input voltage
2
V
VIL Low-level control input voltage
0.8 V
TA Operating free-air temperature
−40 85 °C
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,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74CBT3345
Description 8-BIT FET BUS SWITCH
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