74vcxh245 Fairchild Semiconductor, 74vcxh245 Datasheet

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74vcxh245

Manufacturer Part Number
74vcxh245
Description
74vcxh245 Low Voltage Bidirectional Transceiver With Bushold
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2005 Fairchild Semiconductor Corporation
74VCXH245WM
74VCXH245MTC
74VCXH245
Low Voltage Bidirectional Transceiver with Bushold
General Description
The VCXH245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus ori-
ented applications. The T/R input determines the direction
of data flow. The OE input disables both the A and B Ports
by placing them in a high impedance state. The VCXH245
data inputs include active bushold circuitry, eliminating the
need for external pull-up resistors to hold unused or float-
ing data inputs at a valid logic level.
The 74VCXH245 is designed for low voltage (1.2V to 3.6V)
V
The 74VCXH245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while main-
taining low CMOS power dissipation.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Quiet Series
Order Number
CC
applications.
¥
is a trademark of Fairchild Semiconductor Corporation.
Package Number
MTC20
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
DS500198
Features
Pin Descriptions
OE
T/R
A
B
0
0
1.2V to 3.6V V
Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
t
Static Drive (I
Uses patented Quiet Series
Latchup performance exceeds 300 mA
ESD performance:
Pin Names
PD
–A
–B
3.5 ns max for 3.0V to 3.6V V
r
circuitry
Human body model
Machine model
24 mA @ 3.0V V
7
7
Package Description
OH
CC
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Bushold Inputs or 3-STATE Outputs
Side B Bushold Inputs or 3-STATE Outputs
/I
OL
supply operation
!
)
200V
CC
!
2000V
¥
June 1999
Revised April 2005
Description
noise/EMI reduction
CC
www.fairchildsemi.com

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74vcxh245 Summary of contents

Page 1

... The VCXH245 data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or float- ing data inputs at a valid logic level. The 74VCXH245 is designed for low voltage (1.2V to 3.6V) V applications. CC The 74VCXH245 is fabricated with an advanced CMOS technology to achieve high-speed operation while main- taining low CMOS power dissipation ...

Page 2

Connection Diagram Logic Diagram www.fairchildsemi.com Truth Table Inputs Outputs OE T Bus B –B Data to Bus Bus A –A Data to Bus HIGH Z State on A ...

Page 3

Absolute Maximum Ratings Supply Voltage ( Input Voltage ( Output Voltage ( Outputs 3-STATE  Outputs Active (Note 2) 0. Input Diode Current ( ...

Page 4

DC Electrical Characteristics Symbol Parameter V LOW Level Output Voltage OL I Input Leakage Current I I Bushold Input Minimum I(HOLD) Drive Hold Current I Bushold Input Over-Drive I(OD) Current to Change State I 3-STATE Output Leakage OZ I Quiescent ...

Page 5

AC Electrical Characteristics Symbol Parameter t , Propagation Delay C PHL PLH Output Enable Time C PZL L t PZH ...

Page 6

AC Loading and Waveforms (V TEST PLH PHL PZL PLZ PZH PHZ FIGURE 2. Waveform for Inverting and Non-inverting Functions FIGURE 3. 3-STATE Output High Enable and Disable Times for Low ...

Page 7

AC Loading and Waveforms (V TEST PLH PHL PZL PLZ PZH PHZ FIGURE 6. Waveform for Inverting and Non-Inverting Functions FIGURE 7. 3-STATE Output High Enable and Disable Times for Low ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit, JEDEC MS-013, 0.300” Wide Body www.fairchildsemi.com Package Number M20B 8 ...

Page 9

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package, JEDEC MO-153, 4.4mm Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the ...

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