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74LCX139

LOW VOLTAGE CMOS

DUAL 2 TO 4 DECODER/DEMULTIPLEXER

■ 5V TOLERANT INPUTS

■ HIGH SPEED:

t

= 6.2ns (MAX.) at VCC = 3V

PD

■ POWER DOWN PROTECTION ON INPUTS

AND OUTPUTS

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

| = IOL = 24mA (MIN) at VCC = 3V

OH

■ PCI BUS LEVELS GUARANTEED AT 24 mA

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

PHL

■ OPERATING VOLTAGE RANGE:

V

(OPR) = 2.0V to 3.6V (1.5V Data

CC

Retention)

■ PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 139

■ LA TCH-UP PERFORMANCE EXCEEDS

500mA (JESD 17)

■ ESD PERFORMANCE:

HBM > 2000V (MIL STD 883 method 3015);
MM > 200V

DESCRIPTION

The 74LCX139 is a low voltage CMOS DU AL 2
TO 4 LINE DECODER/DEMULTIPLEXER
fabricated with sub-micron silicon gate and
double-layer metal wiring C

2

MOS technology.
It is ideal for low power and high speed 3.3V
applications; it can be interfaced to 5V signal
environment for inputs.

TSSOPSOP

Table 1: Order Codes

PACKAGE T & R

SOP 74LCX139MTR

TSSOP 74LCX139TTR

The active low enable input can be used for gating
or as a data input for demultiplexing applications.
While the enable input is held high, all four outputs
are high independently of the other inputs.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and outputs are equipped with
protection circuits against static disc harge, giving
them 2KV ESD immunity and transient excess
voltage.

Figure 1: Pin C onnection And I EC Logic Symbol s

Rev. 3

1/12September 2004

74LCX139

Figure 2: Input An d Output Equival e n t Ci rcui t

Table 2: Pin Description

PIN N° SYMBOL NAME AND FUNCTION

1, 15 1G

2, 3 1A, 1B Address Inputs

4, 5, 6, 7 1Y0

12, 11, 10, 9 2Y0

14, 13 2A, 2B Address Inputs

8 GND Ground (0V)

16 V

, 2G Enable Inputs

to 1Y3 Outputs
to 2Y3 Outputs

CC

Positive Supply Voltage

Table 3: Truth Table

INPUTS

ENABLE SELECT

G

HXXHHHH

LLLLHHH
LLHHLHH
LHLHHLH
LHHHHHL

X : Don’t Care

BAY0Y1 Y2 Y3

OUTPUTS

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74LCX139

Figure 3: Logic Diagram

This logi c di agram has not be used to estim ate propaga tion delays

Table 4: Absolute Maximum Ratings

Symbol Parameter Value Unit

V

V
V
V

I

I

OK

I

I

CC

I

GND

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied

1) I

absolute maximum rating must be observed

O

< GND

2) V

O

Table 5: Recommended Operating Conditions

Supply Voltage

CC

DC Input Voltage

I

DC Output Voltage (VCC = 0V)

O

DC Output Voltage (High or Low State) (note 1) -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current (note 2)
DC Output Current

O

DC Supply Current per Supply Pin
DC Ground Current per Supply Pin
Storage Temperature

stg

Lead Temperature (10 sec)

L

-0.5 to +7.0 V

-0.5 to +7.0 V

-0.5 to +7.0 V
V

- 50 mA

- 50 mA

± 50 mA
± 100 mA
± 100 mA

-65 to +150 °C
300 °C

Symbol Parameter Value Unit

I
I

V

V
V
V

OH
OH

T

Supply Voltage (note 1)

CC

Input Voltage

I

Output Voltage (VCC = 0V)

O

Output Voltage (High or Low State) 0 to V

O

, I

High or Low Level Output Current (VCC = 3.0 to 3.6V)

OL

, I

High or Low Level Output Current (VCC = 2.7V)

OL

Operating Temperature

op

2.0 to 3.6 V
0 to 5.5 V
0 to 5.5 V

CC

± 24 mA
± 12 mA

-55 to 125 °C

dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V

1) Truth T abl e guarante ed: 1.5V to 3.6V

2) VIN from 0.8V to 2V at VCC = 3.0V

V

3/12

74LCX139

Table 6: DC Specifications

Test Condition Value

Symbol Parameter

V

CC

(V)

V

V

V

V

I

I

CC

∆I

High Level Input

IH

Voltage
Low Level Input

IL

Voltage
High Level Output

OH

Voltage

Low Level Output

OL

Voltage

Input Leakage

I

I

Current
Power Off Leakage

off

Current
Quiescent Supply

Current
ICC incr. per Input

CC

2.7 to 3.6

2.7 to 3.6

2.7

3.0

2.7 to 3.6

2.7

3.0

2.7 to 3.6

0

2.7 to 3.6

2.7 to 3.6

IO=-100 µAVCC-0.2 VCC-0.2

I

=-12 mA

O

=-18 mA

I

O

=-24 mA

I

O

IO=100 µA

I

=12 mA

O

I

=16 mA

O

=24 mA

I

O

= 0 to 5.5V

V

I

or VO = 5.5V

V

I

VI = VCC or GND
or VO= 3.6 to 5.5V

V

I

VIH = VCC - 0.6V

Table 4: DYNAMIC SWITCHING CHARACTERISTICS

-40 to 85 °C -55 to 125 °C

Min. Max. Min. Max.

2.0 2.0 V

0.8 0.8 V

2.2 2.2

2.4 2.4

2.2 2.2

0.2 0.2

0.4 0.4

0.4 0.4

0.55 0.55
± 5 ± 5 µA

10 10 µA
10 10

± 10 ± 10

500 500 µA

Unit

V

V

µA

Test Condition Value

= 25 °C

Symbol Parameter

V

CC

(V)

V

OLP

V

OLV

1) Number of outputs defined as "n". Measured wi t h "n-1" output s switching from HIGH to LO W or LOW to HIGH. The remaining output is
measur ed i n the LOW state.

Dynamic Low Level Quiet
Output (note 1)

3.3

= 50pF

C

L

V

= 0V, VIH = 3.3V

IL

T

A

Min. Typ. Max.

0.8

-0.8

Unit

V

Table 7: AC Electrical Characteristics

Test Condition Value

Symbol Parameter

t

PLH tPHL

t

PLH tPHL

t

OSLH

t

OSHL

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch­ing in the sa me directio n, either HIGH or LOW (t

2) Param eter guaran teed by design

Propagation Delay
Time A, B to Y

Propagation Delay

to Y

Time G
Output To Output

Skew Time (note1,

2)

V

CC

(V)

2.7

3.0 to 3.6 1.0 6.2 1.0 6.2

2.7

3.0 to 3.6 1.0 5.3 1.0 5.3

C

R

L

(pF)

(Ω)

50 500 2.5

50 500 2.5

= t

t

L

s

(ns)

3.0 to 3.6 50 500 2.5 1.0 1.0 ns

OSLH

= | t

PLHm

- t

PLHn

|, t

OSHL

= | t

-40 to 85 °C -55 to 125 °C

r

Min. Max. Min. Max.

7.3 7.3

5.8 5.8

- t

PHLn

|)

PHLm

Unit

ns

ns

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