Datasheet

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April 1993

Revised April 2005

74LVX245 Low Voltage Octal Bidirectional Transceiver

74LVX245

Low Voltage Octal Bidirectional Transceiver

General Description

The LVX245 contains eight non-inverting bidirectional buff-

ers and is intended for bus-oriented applications. The

Transmit/Receive (T/R

) input determines the direction of

data flow through the bidirectional transceiver. Transmit

(active-HIGH) enables data from A ports to B ports;

Receive (active-LOW) enables data from B ports to A

ports. The Output Enable input, when HIGH, disables both

A and B ports by placing them in a high impedance condi-

tion.

Features

■ Ideal for low power/low noise 3.3V applications

■ Guaranteed simultaneous switching noise level and

dynamic threshold performance

Ordering Code

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Pb-Free package per JEDEC J-STD-020B.

Logic Symbols Connection Diagram

Pin Descriptions Truth Table

H HIGH Voltage Level X Immaterial

LOW Voltage Level

Order Number Package Number Package Description

74LVX245M M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74LVX245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74LVX245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Description

Names

Output Enable Input

T/R

Transmit/Receive Input

–A

Side A Inputs or 3-STATE Outputs

–B

Side B Inputs or 3-STATE Outputs

Inputs

Outputs

T/R

L L Bus B Data to Bus A

L H Bus A Data to Bus B

HXHIGH-Z State

Summary of content (6 pages)

PAGE 1
Revised April 2005 74LVX245 Low Voltage Octal Bidirectional Transceiver General Description Features The LVX245 contains eight non-inverting bidirectional buffers and is intended for bus-oriented applications. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports.
PAGE 2
74LVX245 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions (Note 2) 0.5V to 7.0V Supply Voltage (VCC) DC Input Diode Current (IIK) VI Supply Voltage (VCC) 0.5V 20 mA 0.5V to 7V DC Input Voltage T/R, OE (VI) 0V to VCC 40qC to 85qC Operating Temperature (TA) 0.5V VCC 0.5V VO 0V to 5.5V Bus I/O Voltage (VI/O) DC Diode Current (IOK) VO 2.0V to 3.6V Input Voltage T/R, OE (VI) 20 mA 20 mA 0.5V to VCC 0.
PAGE 3
Symbol tPLH VCC Parameter (V) 25qC TA Max Min Max 2.7 6.1 10.7 1.0 13.5 8.6 14.2 1.0 17.0 3.3 r 0.3 4.7 6.8 1.0 8.0 7.2 10.1 1.0 9.0 16.9 11.5 tPHL tPZL 3-STATE Output tPZH Enable Time TA 40qC to 85qC Typ Propagation Delay Time Min Units Conditions CL 15 pF CL 50 pF CL 15 pF 11.5 CL 50 pF 1.0 20.5 CL 15 pF, RL 1 k: 20.4 1.0 24.0 CL 50 pF, RL 1 k: 7.1 11.0 1.0 13.0 CL 15 pF, RL 1 k: 9.6 14.5 1.0 16.5 CL 50 pF, RL 1 k: 2.7 11.5 18.
PAGE 4
74LVX245 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B www.fairchildsemi.
PAGE 5
74LVX245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D 5 www.fairchildsemi.
PAGE 6
74LVX245 Low Voltage Octal Bidirectional Transceiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.