74VCXH245
器件描述：Low Voltage Bidirectional Transceiver with Bushold
器件厂商：FAIRCHILD [Fairchild Semiconductor]
文件大小：81.3KB，共8页
Sponsor by e络盟器件资料摘要：
© 1999 Fairchild Semiconductor Corporation ds500198 www.fairchildsemi.com
June 1999
Revised June 1999
7
4
VC
XH245
Low
V
o
l
t
ag
e Bi
dir
ecti
onal
T
r
anscei
ver
wit
h
Bushol
d
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 (1.65V to
3.6V) V
CC
applications.
The 74VCXH245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while main-
taining low CMOS power dissipation.
Features
a73 1.65V-3.6V V
CC
supply operation
a73 Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
a73 t
PD
3.5 ns max for 3.0V to 3.6V V
CC
4.2 ns max for 2.3V to 2.7V V
CC
8.4 ns max for 1.65V to 1.95V V
CC
a73 Static Drive (I
OH
/I
OL
)
±24 mA @ 3.0V V
CC
±18 mA @ 2.3V V
CC
± 6mA @ 1.65V V
CC
a73 Uses patented Quiet Series noise/EMI reduction
circuitry
a73 Latchup performance exceeds 300 mA
a73 ESD performance:
Human body model > 2000V
Machine model > 200V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol Pin Descriptions
Quiet Series is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74VCXH245WM M20B 20-Lead Small Outline Integrated Circuit, JEDEC MS-013, 0.300” Wide Body
74VCXH245MTC MTC20 20-Lead Thin Shrink Small Outline Package, JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE Output Enable Input (Active LOW)
T/R Transmit/Receive Input
A
0
–A
7
Side A Bushold Inputs or 3-STATE Outputs
B
0
–B
7
Side B Bushold Inputs or 3-STATE Outputs
June 1999
Revised June 1999
7
4
VC
XH245
Low
V
o
l
t
ag
e Bi
dir
ecti
onal
T
r
anscei
ver
wit
h
Bushol
d
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 (1.65V to
3.6V) V
CC
applications.
The 74VCXH245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while main-
taining low CMOS power dissipation.
Features
a73 1.65V-3.6V V
CC
supply operation
a73 Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
a73 t
PD
3.5 ns max for 3.0V to 3.6V V
CC
4.2 ns max for 2.3V to 2.7V V
CC
8.4 ns max for 1.65V to 1.95V V
CC
a73 Static Drive (I
OH
/I
OL
)
±24 mA @ 3.0V V
CC
±18 mA @ 2.3V V
CC
± 6mA @ 1.65V V
CC
a73 Uses patented Quiet Series noise/EMI reduction
circuitry
a73 Latchup performance exceeds 300 mA
a73 ESD performance:
Human body model > 2000V
Machine model > 200V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol Pin Descriptions
Quiet Series is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74VCXH245WM M20B 20-Lead Small Outline Integrated Circuit, JEDEC MS-013, 0.300” Wide Body
74VCXH245MTC MTC20 20-Lead Thin Shrink Small Outline Package, JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE Output Enable Input (Active LOW)
T/R Transmit/Receive Input
A
0
–A
7
Side A Bushold Inputs or 3-STATE Outputs
B
0
–B
7
Side B Bushold Inputs or 3-STATE Outputs