NSC 5962-9861901QLA, 5962-9861901QKA, 54LVXC3245MD8 Datasheet

54LVXC3245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with TRI-STATE

®

Outputs

General Description

The LVXC3245 is a 24-pin dual-supply, 8-bit configurable
voltage interface transceiver suited for real time configurable
I/O applications. The V

CCA

pin accepts a 3V supply level.

The A port is a dedicated 3V port. The V

CCB

pin accepts a
3V-to-5V supply level. The B port is configured to track the
V

CCB

supply level respectively.A5V level on the VCCpin will

configure the I/O pins at a 5V level and a 3V V

CC

will config-

ure the I/O pins at a 3V level. This device will allow the V

CCB

voltage source pin and I/O pins on the B port to float when
OE is HIGH. This feature is necessary to buffer data to and
from sockets that require live insertion and removal during
normal operation.

Features

n Bidirectional interface between 3V and 3V-to-5V buses
n Control inputs compatible with TTL level
n Outputs source/sink up to 24 mA
n Available in Cerpack and CDIP package
n Implements patented EMI reduction circuitry
n Flexible V

CCB

operating range

n Allows B port and V

CCB

to float simultaneously when OE

is HIGH

n Functionally compatible with the 54 series 245
n Standard Microcircuit Drawing (SMD) 5962-9861901

Ordering Code

Order Number Package Number Package Description

54LVXC3245W-QML W24A 24-Lead (0.300" Wide) Ceramic Flatpack
54LVXC3245J-QML J24F 24-Lead Ceramic Dual-in-line

Logic Symbol

Pin Descriptions

Pin Names Description

OE

Output Enable Input

T/R

Transmit/Receive Input

A

0–A7

Side A Inputs or 3-STATE Outputs

B

0–B7

Side B Inputs or 3-STATE Outputs

Connection Diagram

TRI-STATE®is a registered trademark of National Semiconductor Corporation

DS101032-1

Pin Assignment for

CDIP and Cerpack

DS101032-2

February 1999

54LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE

®

Outputs

© 1999 National Semiconductor Corporation DS101032 www.national.com

Truth Table

Inputs Outputs

OE

T/R

L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X HIGH-Z State

H=High Voltage Level
L=Low Voltage Level
X=Immaterial

Logic Diagram

DS101032-4

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage (V

CCA,VCCB

) −0.5V to +7.0V

DC Input Voltage (V

I

)@OE, T/R −0.5V to V

CCA

+0.5V

DC Input/Output Voltage (V

I/O

)

@

A

n

−0.5V to V

CCA

+0.5V

@

B

n

−0.5V to V

CCB

+0.5V

DC Input Diode Curr. (I

IK

)@OE,

T/R

±

20 mA

DC Output Diode (I

OK

)Current

±

50 mA

DC Output Source or Sink Current

(I

O

)

±

50 mA

DC V

CC

or Ground Current

per Output Pin (I

CC

or I

GND

)

±

50 mA

and Max Current

±

200 mA

Storage Temperature Range (T

STG

) −65˚C to +150˚C

Recommended Operating
Conditions

(Note 2)

Supply Voltage

V

CCA

2.7V to 3.6V

V

CCB

3.0V to 5.5V

Input Voltage (V

I

)@OE, T/R 0V to V

CCA

Input Output Voltage (V

I/O

)

@

A

n

0V to V

CCA

@

B

n

0V to V

CCB

Free Air Operating Temperature (TA) −55˚C to +125˚C
Minimum Input Edge Rate (∆V/∆t) 8 ns/V

V

IN

from 30%to 70%of V

CC

V

CC

@

3.0V, 4.5V, 5.5V

Note 1: 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
“Recommended Operating Conditions” table will define the conditions for ac­tual device operation.

Note 2: The A port unused pins (inputs or I/Os) must be held HIGH or LOW.
They may not float.

DC Electrical Characteristics

Symbol Parameter

V

CCA

(V)

V

CCB

(V)

Units Conditions

T

A

=

−55˚C to

+125˚C

Guaranteed

Limits

V

IHA

Minimum High An, 2.7 3.0 2.0 V V

OUT

≤ 0.1V
or
≥V

CC

− 0.1V

Level Input OE

3.0 3.6 2.0

Voltage T/R

3.6 5.5 2.0

V

IHB

B

n

2.7 3.0 2.0

3.0 3.6 2.0

3.6 5.5 3.85

V

ILA

Maximum Low An, 2.7 3.0 0.8 V V

OUT

≤ 0.1V
or
≥V

CC

− 0.1V

Level Input OE

3.0 3.6 0.8

Voltage T/R

3.6 5.5 0.8

V

ILB

B

n

2.7 3.0 0.8

3.0 3.6 0.8

3.6 5.5 1.65

V

OHA

Minimum High Level 2.7 3.0 2.6 V I

OH

=

−100 µA

Output Voltage 3.6 5.5 3.5 I

OH

=

−100 µA

2.7 3.0 2.2 I

OH

=

−12 mA

3.0 3.0 2.4 I

OH

=

−12 mA

3.0 3.0 2.2 I

OH

=

−24 mA

V

OHB

2.7 3.0 2.9 V I

OH

=

−100 µA

3.6 5.5 5.4 I

OH

=

−100 µA

2.7 3.0 2.4 I

OH

=

−12 mA

3.0 3.0 2.2 I

OH

=

−24 mA

3.0 4.5 3.7 I

OH

=

−24 mA

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