ST 74LCX139 User Manual

74LCX139

74LCX139

LOW VOLTAGE CMOS

DUAL 2 TO 4 DECODER/DEMULTIPLEXER

■5V TOLERANT INPUTS

■HIGH SPEED:

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

■POWER DOWN PROTECTION ON INPUTS AND OUTPUTS

■SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) at VCC = 3V

■PCI BUS LEVELS GUARANTEED AT 24 mA

■BALANCED PROPAGATION DELAYS: tPLH tPHL

■OPERATING VOLTAGE RANGE:

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

■PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 139

■LATCH-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 DUAL 2 TO 4 LINE DECODER/DEMULTIPLEXER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.

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

SOP TSSOP

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 discharge, giving them 2KV ESD immunity and transient excess voltage.

Figure 1: Pin Connection And IEC Logic Symbols

September 2004	Rev. 3
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74LCX139

Figure 2: Input And Output Equivalent Circuit

Table 2: Pin Description

PIN N°

SYMBOL

NAME AND FUNCTION

1, 15

1G,

2G

Enable Inputs

2, 3

1A, 1B

Address Inputs

4, 5, 6, 7

1Y0 to 1Y3

Outputs

12, 11, 10, 9

2Y0

to 2Y3

Outputs

14, 13

2A, 2B

Address Inputs

8

GND

Ground (0V)

16

VCC

Positive Supply Voltage

Table 3: Truth Table

INPUTS

OUTPUTS

ENABLE

SELECT

G

B

A

Y0

Y1

Y2

Y3

H

X

X

H

H

H

H

L

L

L

L

H

H

H

L

L

H

H

L

H

H

L

H

L

H

H

L

H

L

H

H

H

H

H

L

X : Don’t Care

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74LCX139

Figure 3: Logic Diagram

This logic diagram has not be used to estimate propagation delays

Table 4: Absolute Maximum Ratings

Symbol	Parameter	Value		Unit
VCC	Supply Voltage	-0.5 to +7.0		V
VI	DC Input Voltage	-0.5 to +7.0		V
VO	DC Output Voltage (VCC = 0V)	-0.5 to +7.0		V
VO	DC Output Voltage (High or Low State) (note 1)	-0.5 to VCC + 0.5		V
IIK	DC Input Diode Current	- 50		mA
IOK	DC Output Diode Current (note 2)	- 50		mA
IO	DC Output Current	±	50	mA
ICC	DC Supply Current per Supply Pin	±	100	mA
IGND	DC Ground Current per Supply Pin	±	100	mA
Tstg	Storage Temperature	-65 to +150		°C
TL	Lead Temperature (10 sec)	300		°C

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

1)IO absolute maximum rating must be observed

2)VO < GND

Table 5: Recommended Operating Conditions

Symbol	Parameter	Value		Unit
VCC	Supply Voltage (note 1)	2.0 to 3.6		V
VI	Input Voltage	0 to 5.5		V
VO	Output Voltage (VCC = 0V)	0 to 5.5		V
VO	Output Voltage (High or Low State)	0 to VCC		V
IOH, IOL	High or Low Level Output Current (VCC = 3.0 to 3.6V)	±	24	mA
IOH, IOL	High or Low Level Output Current (VCC = 2.7V)	±	12	mA
Top	Operating Temperature	-55 to 125		°C
dt/dv	Input Rise and Fall Time (note 2)	0 to 10		ns/V

1)Truth Table guaranteed: 1.5V to 3.6V

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

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74LCX139

Table 6: DC Specifications

		Test Condition			Value
Symbol	Parameter	VCC		-40 to 85 °C		-55 to 125 °C		Unit
		(V)		Min.	Max.	Min.	Max.
VIH	High Level Input			2.0		2.0		V
	Voltage	2.7 to 3.6
VIL	Low Level Input				0.8		0.8	V
	Voltage
VOH	High Level Output	2.7 to 3.6	IO=-100 µ A	VCC-0.2		VCC-0.2
	Voltage
		2.7	IO=-12 mA	2.2		2.2		V
		3.0	IO=-18 mA	2.4		2.4
			IO=-24 mA	2.2		2.2
VOL	Low Level Output	2.7 to 3.6	IO=100 µ A		0.2		0.2
	Voltage
		2.7	IO=12 mA		0.4		0.4	V
		3.0	IO=16 mA		0.4		0.4
			IO=24 mA		0.55		0.55
II	Input Leakage	2.7 to 3.6	VI = 0 to 5.5V		± 5		± 5	µ A
	Current
Ioff	Power Off Leakage	0	VI or VO = 5.5V		10		10	µ A
	Current
ICC	Quiescent Supply	2.7 to 3.6	VI = VCC or GND		10		10	µ A
	Current
			VI or VO= 3.6 to 5.5V		± 10		± 10
∆ ICC	ICC incr. per Input	2.7 to 3.6	VIH = VCC - 0.6V		500		500	µ A

Table 4: DYNAMIC SWITCHING CHARACTERISTICS

			Test Condition				Value
Symbol	Parameter	VCC				TA = 25		°C			Unit
		(V)			Min.		Typ.			Max.
VOLP	Dynamic Low Level Quiet	3.3		CL = 50pF			0.8				V
	Output (note 1)			VIL = 0V, VIH = 3.3V
VOLV							-0.8

1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state.

Table 7: AC Electrical Characteristics

				Test Condition					Value
Symbol	Parameter											Unit
				VCC	CL	RL	ts = tr	-40 to 85 °C		-55 to 125 °C
				(V)	(pF)	(Ω )	(ns)	Min.	Max.	Min.	Max.
tPLH tPHL	Propagation Delay			2.7	50	500	2.5		7.3		7.3	ns
	Time A, B to Y			3.0 to 3.6				1.0	6.2	1.0	6.2
tPLH tPHL	Propagation Delay			2.7	50	500	2.5		5.8		5.8	ns
	Time G to Y
				3.0 to 3.6				1.0	5.3	1.0	5.3
tOSLH	Output To Output			3.0 to 3.6	50	500	2.5		1.0		1.0	ns
tOSHL	Skew Time (note1,
	2)

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-

ing in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn|) 2) Parameter guaranteed by design

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