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74LCXZ245MTC

P1-P3P4-P6P7-P9P10-P10
© 2005 Fairchild Semiconductor Corporation DS500362 www.fairchildsemi.com
October 2000
Revised March 2005
74LCXZ245 Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
74LCXZ245
Low Voltage Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs
General Description
The 74LCXZ245 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 with capability of interfac-
ing to a 5V signal environment. The T/R
input determines
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 74LCXZ245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation. When V
CC
is between 0V
and 1.5V, the 74LCXZ245 is on the high impedance state
during power up or power down. This places the outputs in
the high impedance (Z) state preventing intermittent low
impedance loading or glitching in bus oriented applications.
Features
■ 5V tolerant inputs and outputs
■ 2.3V–3.6V V
CC
specifications provided
■ 7.0 ns t
PD
max (V
CC
3.3V), 10 A I
CC
max
■ Power down high impedance inputs and outputs
■ Supports live insertion/withdrawal (Note 1)
■ 24 mA output drive (V
CC
3.0V)
■ Implements patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 500 mA
■ ESD performance:
Human body model 2000V
Machine model
200V
Note 1: To ensure the high-impedance state during power up or down, OE
should be tied to V
CC
through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
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 Symbol
Pin Descriptions
Connection Diagram
Order Number Package Number Package Description
74LCXZ245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCXZ245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCXZ245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74LCXZ245MTC 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
B
0
–B
7
Side B Inputs or 3-STATE Outputs
www.fairchildsemi.com 2
74LCXZ245
Truth Table
H HIGH Voltage Level
L
LOW Voltage Level
X
Immaterial
Z
High Impedance
Note 2: Unused bus terminals during HIGH Z State must be held HIGH or LOW.
Logic Diagram
Inputs
Outputs
OE
T/R
L L Bus B
0
– B
7
Data to Bus A
0
– A
7
L H Bus A
0
– A
7
Data to Bus B
0
– B
7
H X HIGH Z State on A
0
– A
7
, B
0
– B
7
(Note 2)
3 www.fairchildsemi.com
74LCXZ245
Absolute Maximum Ratings(Note 3)
Recommended Operating Conditions (Note 5)
Note 3: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recom-
mended Operating Conditions” table will define the conditions for actual device operation.
Note 4: I
O
Absolute Maximum Rating must be observed.
Note 5: Unused inputs or I/O pins must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol Parameter Value Conditions Units
V
CC
Supply Voltage 0.5 to 7.0 V
V
I
DC Input Voltage 0.5 to 7.0 V
V
O
DC Output Voltage 0.5 to 7.0 Output in 3-STATE
V
0.5 to V
CC
0.5 Output in HIGH or LOW State (Note 4)
I
IK
DC Input Diode Current 50 V
I
GND mA
I
OK
DC Output Diode Current 50 V
O
GND
mA
50 V
O
V
CC
I
O
DC Output Source/Sink Current 50 mA
I
CC
DC Supply Current per Supply Pin 100 mA
I
GND
DC Ground Current per Ground Pin 100 mA
T
STG
Storage Temperature 65 to 150 C
Symbol Parameter Min Max Units
V
CC
Supply Voltage Operating 2.7 3.6 V
V
I
Input Voltage 05.5V
V
O
Output Voltage HIGH or LOW State 0 V
CC
V
3-STATE 0 5.5
I
OH
/I
OL
Output Current V
CC
3.0V 3.6V 24
mAV
CC
2.7V - 3.0V 12
V
CC
2.3V - 2.7V 8
T
A
Free-Air Operating Temperature 40 85 C
t/ V Input Edge Rate, V
IN
0.8V 2.0V, V
CC
3.0V 0 10 ns/V
Symbol Parameter Conditions
V
CC
T
A
40 C to 85 C
Units
(V) Min Max
V
IH
HIGH Level Input Voltage 2.3 2.7 1.7
V
2.7 3.6 2.0
V
IL
LOW Level Input Voltage 2.3 2.7 0.7
V
2.7 - 3.6 0.8
V
OH
HIGH Level Output Voltage I
OH
100 A 2.3 - 3.6 V
CC
0.2
V
I
OH
8 mA 2.3 1.8
I
OH
12 mA 2.7 2.2
I
OH
18 mA 3.0 2.4
I
OH
24 mA 3.0 2.2
V
OL
LOW Level Output Voltage I
OL
100 A2.3 3.6 0.2
V
I
OL
8mA 2.3 0.6
I
OL
12 mA 2.7 0.4
I
OL
16 mA 3.0 0.4
I
OL
24 mA 3.0 0.55
I
I
Input Leakage Current 0 V
I
5.5V 2.3 3.6 5.0 A
I
OZ
3-STATE I/O Leakage 0 V
O
5.5V
2.3 3.6 5.0 A
V
I
V
IH
or V
IL
I
OFF
Power-Off Leakage Current V
I
or V
O
5.5V 0 10 A
I
PU/PD
Power Up/ Power Down V
O
to V
CC
0 1.5 5.0 A
3-STATE Output Current V
I
V
CC
or GND
P1-P3P4-P6P7-P9P10-P10

74LCXZ245MTC

Mfr. #:
Buy 74LCXZ245MTC
Manufacturer:
ON Semiconductor / Fairchild
Description:
Bus Transceivers Transceiver Bidirectional
Lifecycle:
New from this manufacturer.
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