74LCXH2245
器件描述：Low Voltage Bidirectional Transceiver with Bushold and 26з Series Resistors in B Outputs
器件厂商：FAIRCHILD [Fairchild Semiconductor]
文件大小：200.04KB，共11页
Sponsor by e络盟器件资料摘要：
© 2001 Fairchild Semiconductor Corporation DS500409 www.fairchildsemi.com
October 2000
Revised September 2001
7
4
LCXH
2
245 Low
V
o
lt
age Bi
dir
ect
ional
T
r
anscei
ver
wit
h
Bush
old
and 2
6
Ω
Seri
es R
e
sist
ors in
B O
u
t
puts
74LCXH2245
Low Voltage Bidirectional Transceiver with Bushold
and 26Ω Series Resistors in B Outputs
General Description
The LCXH2245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus ori-
ented applications. The device is designed for low voltage
(2.5V and 3.3V) V
CC
applications. The T/R input deter-
mines the direction of data flow through the device. The OE
input disables both the A and B ports by placing them in a
high impedance state. The 26Ω series resistor in the B Port
output helps reduce output overshoot and undershoot.
The LCXH2245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
The LCXH2245 data inputs include active bushold circuitry,
eliminating the need for external pull-up resistors to hold
unused or floating data inputs at a valid logic level.
Features
a73 5V tolerant control inputs
a73 2.3V–3.6V V
CC
specifications provided
a73 Bushold on inputs eliminates the need for external
pull-up/pull-down resistors
a73 7.0 ns t
PD
max (V
CC
= 3.3V), 10 µA I
CC
max
a73 Power down high impedance outputs
a73 ±12 mA output drive B Port (V
CC
= 3.0V)
a73 Implements patented noise/EMI reduction circuitry
a73 Latch-up performance exceeds 500 mA
a73 Equivalent 26Ω series resistor on B Port outputs
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
Connection Diagram
GTO is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74LCXH2245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCXH2245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCXH2245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74LCXH2245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE Output Enable Input
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs (Bushold)
B
0
–B
7
Side B Inputs or 3-STATE Outputs (Bushold)
October 2000
Revised September 2001
7
4
LCXH
2
245 Low
V
o
lt
age Bi
dir
ect
ional
T
r
anscei
ver
wit
h
Bush
old
and 2
6
Ω
Seri
es R
e
sist
ors in
B O
u
t
puts
74LCXH2245
Low Voltage Bidirectional Transceiver with Bushold
and 26Ω Series Resistors in B Outputs
General Description
The LCXH2245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus ori-
ented applications. The device is designed for low voltage
(2.5V and 3.3V) V
CC
applications. The T/R input deter-
mines the direction of data flow through the device. The OE
input disables both the A and B ports by placing them in a
high impedance state. The 26Ω series resistor in the B Port
output helps reduce output overshoot and undershoot.
The LCXH2245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
The LCXH2245 data inputs include active bushold circuitry,
eliminating the need for external pull-up resistors to hold
unused or floating data inputs at a valid logic level.
Features
a73 5V tolerant control inputs
a73 2.3V–3.6V V
CC
specifications provided
a73 Bushold on inputs eliminates the need for external
pull-up/pull-down resistors
a73 7.0 ns t
PD
max (V
CC
= 3.3V), 10 µA I
CC
max
a73 Power down high impedance outputs
a73 ±12 mA output drive B Port (V
CC
= 3.0V)
a73 Implements patented noise/EMI reduction circuitry
a73 Latch-up performance exceeds 500 mA
a73 Equivalent 26Ω series resistor on B Port outputs
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
Connection Diagram
GTO is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74LCXH2245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCXH2245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCXH2245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74LCXH2245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE Output Enable Input
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs (Bushold)
B
0
–B
7
Side B Inputs or 3-STATE Outputs (Bushold)