Fairchild Semiconductor 74LCXH16245 Datasheet

74LCXH16245
Low Voltage 16-Bit Bidirectional Transceiver

with Bushold

74LCXH16245 Low Voltage 16-Bit Bidirectional Transceiver with Bushold

May 2002
Revised May 2002

General Description

The LCXH16245 contains sixteen non-inverting bidirec­tional buffers with 3-STATE outputs and is intended for bus
oriented application s. The device is de signed for low vo lt­age (2.5V or 3.3V) V

facing to a 5V signal environment. The device is byte
controlled. Each byte has separate control inputs which
could be shorted toge ther fo r ful l 16-bit op eration . The T /R
inputs determine the direction of data flow through the
device. The OE
placing them in a high impedance state.

The LCXH16245 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.

The LCXH16245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain­ing CMOS low power dissipation.

applications with capability of inter-

CC

inputs disable both t he A and B Ports by

Features

■ 2.3V–3.6V VCC specifications provided

■ 4.5 ns t

■ Power-down high impedance outputs

■ Bushold on inputs eliminates the need for external

pull-up/pull-down resistors

■

±24 mA output drive (V

■ Implements patented noise/EMI reduction circuitry

■ Latch-up performan ce conforms to the requ irements of

JESD78

■ ESD performance:

■ Also packaged in plastic Fine-Pitch Ball Grid Array

(FBGA)

max (VCC = 3.3V), 20 µA ICC max

PD

Human body model
Machine model

> 200V

Ordering Code:

Order Number Package Number Package Description

74LCXH16245G
(Note 1) (Note 2)

74LCXH16245MTD
(Note 2)

Note 1: Ordering Code “G” indicates Trays.
Note 2: Devices also available in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.

BGA54A 54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide

MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Logic Symbol

= 3.0V)

CC

> 2000V

© 2002 Fairchild Semiconductor Corporation DS500581 www.fairchildsemi.com

Connection Diagrams

Pin Assignment for SSOP and TSSOP

74LCXH16245

Pin Assignment for FBGA

Pin Descriptions

Pin Names Description

OE
T/R
A

0–A15

B

0–B15

n

n

Output Enable Input
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs (Bushold)
Side B Inputs or 3-STATE Outputs (Bushold)

FBGA Pin Assignments

123456

A B
B B
C B
D B
E B
F B

G B

H B
J B

NC T/R1OE1NC A

0

B

2
4
6

8
10
12
14

15

NC NC A

1

B3V

CCVCC

B5GND GND A
B7GND GND A
B9GND GND A9A

B11V

CCVCCA11

B

NC NC A

13

NC T/R2OE2NC A

Truth Tables

Inputs

OE

T/R

1

1

LLBus B
LHBus A
H X HIGH Z State on A0–A7, B0–B

Inputs

OE

T/R

2

2

L L Bus B8–B15 Data to Bus A8–A
L H Bus A8–A15 Data to Bus B8–B

H X HIGH Z State on A8–A15, B8–B

H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance

Outputs

Data to Bus A0–A

0–B7

Data to Bus B0–B

0–A7

Outputs

1

A

3
5
7

13A14

7
7

15
15

15

0

A

2

A

4

A

6

A

8

10

A

12

15

7

(Top Thru View)

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Logic Diagram

Absolute Maximum Ratings(Note 3)

Symbol Parameter Value Conditions Units

V
V
V

I
I

I
I
I
T

CC
I
O

IK
OK

O
CC
GND

STG

Supply Voltage −0.5 to +7.0 V
DC Input Voltage −0.5 to VCC + 0.5 V
DC Output Voltage −0.5 to +7.0 Output in 3-STATE

−0.5 to V

+ 0.5 Output in HIGH or LOW State (Note 4)

CC

DC Input Diode Current −50 VI < GND mA
DC Output Diode Current −50 VO < GND

+50 V

> V

O

CC

mA

DC Output Source/Sink Current ±50 mA
DC Supply Current per Supply Pin ±100 mA
DC Ground Current per Ground Pin ±100 mA
Storage Temperature −65 to +150 °C

Recommended Operating Conditions (Note 5)

Symbol Parameter Min Max Units

V

CC

V

I

V

O

IOH/I

T

A

∆t/∆V Input Edge Rate, V

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 c onditions for actual devic e operation.

Note 4: I
Note 5: Floati ng or unused control inputs must be HIGH or LOW.

Supply Voltage Operating 2.0 3.6

Data Retention 1.5 3.6
Input Voltage 0VCCV
Output Voltage HIGH or LOW State 0 V

3-STATE 0 V

Output Current VCC = 3.0V − 3.6V ±24

OL

= 2.7V − 3.0V ±12

CC

V

= 2.3V − 2.7V ±8

CC

Free-Air Operating Temperat ure −40 85 °C

= 0.8V–2.0V, VCC = 3.0V 0 10 ns/V

IN

Absolute Maximum Rating must be observed.

O

CC
CC

mAV

74LCXH16245

V

V

V

DC Electrical Characteristics

Symbol Parameter Conditions

V

IH

V

IL

V

OH

V

OL

I

I

HIGH Level Input Voltage 2.3 − 2.7 1.7

LOW Level Input Voltage 2.3 − 2.7 0.7

HIGH Level Output Voltage IOH = −100 µA2.3 − 3.6 VCC − 0.2

IOH = −8 mA 2.3 1.8
IOH = −12 mA 2.7 2.2
IOH = −18 mA 3.0 2.4
IOH = −24 mA 3.0 2.2

LOW Level Output Voltage IOL = 100 µA2.3 − 3.6 0.2

IOL = 8mA 2.3 0.6
IOL = 12 mA 2.7 0.4
IOL = 16 mA 3.0 0.4
IOL = 24 mA 3.0 0.55

Input Leakage Current Data VI = VCC or GND 2.3 − 3.6 ±5.0

Control O ≤ VI ≤ 5.5 2.3 − 3.6 ±5.0

V

2.7 − 3.6 2.0

2.7 − 3.6 0.8

TA = −40°C to +85°C

CC

(V) Min Max

Units

V

V

V

V

µA

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