Fairchild Semiconductor 74LCXZ16240MEA Datasheet

Preliminary

February 2000
Revised February 2000

74LCXZ16240
Low Voltage 16-Bit Inverting Buffer/Line Driver with

5V Tolerant Inputs/Outputs (Preliminary)

74LCXZ16240 Low Voltage 16-Bit Inverting Buffer/Line Driver with 5V Tolerant Inputs/Outputs (Preliminary)

General Description

The LCXZ16240 contains si xteen inverting buffers with 3­STATE outputs designed to be employed as a memory and
address driver, clock driver, or bus-oriented transmitter/
receiver. The device is nibble controlled. Each nibble has
separate 3-STATE control inputs which can be shorted
together for full 16-bit operation.

When V
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.

The LCXZ16240 is de si gn ed for low vo lt age (2 .7V or 3.3V)
V

environment.
The LCXZ16240 is fabricated with an advanced CMOS

technology to achieve high speed operation while maintain­ing CMOS low power dissipation.

is between 0 and 1.5V, the LCXZ16240 is in the

CC

applications with capacity o f inter facin g to a 5V sig nal

CC

Features

■ 5V tolerant inputs and outputs

■ Guaranteed power up/down high impedance

■ Supports live insertion/withdrawal

■ 2.7V–3.6V V

■ 4.5 ns t

■ ±24 mA output drive (V

■ Implements patented noise/EMI reduction circuitry

■ Latch-up performance exce eds 500 mA

■ ESD performance:

Human body model > 2000V
Machine model > 200V

specifications provided

CC

max (VCC = 3.3V), 20 µA ICC max

PD

= 3.0V)

CC

Ordering Code:

Order Number Package Number Package Description

74LCXZ16240MEA MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74LCXZ16240MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering cod e.

Connection Diagram Logic Symbol

Pin Descriptions

Pin Names Description

OE

n

I

0–I15

O

0–O15

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Output Enable Inputs (Active LOW)
Inputs
Outputs

Truth Tables

Preliminary

74LCXZ16240

Inputs Outputs

OE

1

I0–I

3

O0–O

LL H
LH L
HX Z

Inputs Outputs

OE

2

I4–I

7

O4–O

LL H
LH L
HX Z

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

Functional Description

The LCXZ16240 contains sixteen inverting buffers with 3­STATE standard outputs. The de vice is n ibble (4 bits) con­trolled with each nibble fun c tion ing i de ntica lly, but indepen­dent of the other. The control pins may be shorted together
to obtain full 16-bit operation. The 3-STATE outputs are

Inputs Outputs

3

OE

3

I8–I

11

O8–O

11

LL H
LH L
HX Z

Inputs Outputs

7

OE

4

I12–I

15

O12–O

15

LL H
LH L
HX Z

controlled by an Output Enable (OEn) input for each nibble.
When OE
OE

is LOW, the outputs are in 2- stat e m od e. When

n

is HIGH, the outputs are in the high impedance mode,

n

but this does not inte rfere with enter ing new data into the
inputs.

Logic Diagram

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Preliminary

Absolute Maximum Ratings(Note 1)

Symbol Parameter Value Conditions Units

V
V
V

I

IK

I

OK

I

O

I

CC

I

GND

T

CC
I
O

STG

Supply Voltage −0.5 to +7.0 V
DC Input Voltage −0.5 to +7.0 V
DC Output Voltage −0.5 to +7.0 Output in 3-STATE or VCC = 0–1.5V

−0.5 to V

+ 0.5 Output in HIGH or LOW State (Note 2)

CC

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

+50 V

O

> V

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 3)

Symbol Parameter Min Max Units

V

CC

V

I

V

O

I

OH/IOL

T

A

∆t/∆V Input Edge Rate, V

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 “Recom-

mended Operating C onditions” table will def ine the conditions for act ual device operation.

Note 2: I
Note 3: Unused inputs must be held HIGH or LOW. They may not float.

Supply Voltage Operating 2.7 3.6 V
Input Voltage 05.5V
Output Voltage HIGH or LOW State 0 V

3-STATE or V

= OFF 0 5.5

CC

Output Current VCC = 3.0V − 3.6V ±24

= 2.7V − 3.0V ±12

V

CC

CC

mA

Free-Air Operating Temperature −40 85 °C

= 0.8V–2.0V, VCC = 3.0V 0 10 ns/V

IN

Absolute Maximum Rating must be observed.

O

74LCXZ16240

V

V

DC Electrical Characteristics

Symbol Parameter Conditions

V

IH

V

IL

V

OH

V

OL

I

I

I

OZ

I

OFF

I

PU/PD

I

CC

∆I

Note 4: Outputs disab led or 3-STATE only.

HIGH Level Input Voltage 2.7 − 3.6 2.0 V
LOW Level Input Voltage 2.7 − 3.6 0.8 V
HIGH Level Output Voltage IOH = −100 µA2.7 − 3.6 VCC − 0.2

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 µA2.7 − 3.6 0.2

Input Leakage Current 0 ≤ VI ≤ 5.5V 2.7 − 3.6 ±5.0 µA
3-STATE Output Leakage 0 ≤ VO ≤ 5.5V

Power-Off Leakage Current VI or VO = 5.5V 0 10 µA
Power Up/Down VO = 0.5V to V
3-STATE Output Current VI = GND or V
Quiescent Supply Current VI = VCC or GND 2.7 − 3.6 225

Increase in ICC per Input VIH = VCC −0.6V 2.7 − 3.6 500 µA

CC

IOL = 12 mA 2.7 0.4
IOL = 16 mA 3.0 0.4
IOL = 24 mA 3.0 0.55

VI = VIH or V

3.6V ≤ VI, VO ≤ 5.5V (Note 4) 2.7 − 3.6 ±225

IL

CC

CC

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V

TA = −40°C to +85°C

CC

(V) Min Max

2.7 − 3.6 ±5.0 µA

0 − 1.5 ±5.0 µA

Units

V

V

µA