Integrated Device Technology Inc IDT54FCT138ATD, IDT54FCT138ATDB, IDT54FCT138ATE, IDT54FCT138ATEB, IDT54FCT138ATL Datasheet

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FAST CMOS	IDT54/74FCT138T/AT/CT
1-OF-8 DECODER
WITH ENABLE

Integrated Device Technology, Inc.

FEATURES:

•Std., A and C speed grades

•Low input and output leakage ≤1μA (max.)

•CMOS power levels

•True TTL input and output compatibility

–VOH = 3.3V (typ.)

–VOL = 0.3V (typ.)

•High drive outputs (-15mA IOH, 48mA IOL)

•Meets or exceeds JEDEC standard 18 specifications

•Product available in Radiation Tolerant and Radiation Enhanced versions

•Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked)

•Available in DIP, SOIC, QSOP, CERPACK and LCC packages

DESCRIPTION:

The IDT54/74FCT138T/AT/CT are 1-of-8 decoders built using an advanced dual metal CMOS technology. The IDT54/ 74FCT138T/AT/CT accepts three binary weighted inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active LOW outputs (O0-O7). The IDT54/74FCT138T/AT/CT features three enable inputs, two active LOW (E1, E2) and one active HIGH (E3). All outputs will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four IDT54/74FCT138T/AT/CT devices and one inverter.

FUNCTIONAL BLOCK DIAGRAM

A2 A1

E1 E2 E3

2570 drw 01

PIN CONFIGURATIONS

A0		1			16	VCC
A1		2	P16-1		15	O0
A1		2			15	O0
A2		3			14	O1
A2		3	D16-1		14
			D16-1
E1		4	SO16-1 13			O2
E1		4	SO16-1 13			O2
E2		5	SO16-7 12			O3
E2		5	SO16-7 12			O3
E3		6		&	11	O4


			E16-1
			E16-1
O7		7			10	O5
GND		8			9	O6
GND		8			9	O6
DIP/SOIC/QSOP/CERPACK
			TOP VIEW
INDEX		A1	A0	NC VCC	0
		A1	A0	NC VCC	0
					O
	3		2	20 19
A2	4			1	18	O1
E1	5				17	O2
NC	6		L20-2		16	NC
E2	7				15	O3
E3	8				14	O4
	9		10 11 12 13
		O7	GND	NC O6	O5
				LCC
			TOP VIEW

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The IDT logo is a registered trademark of Integrated Device Technology, Inc.

MILITARY AND COMMERCIAL TEMPERATURE RANGES		APRIL 1995
©1995 Integrated Device Technology, Inc.	6.3	DSC-4213/5
		1

IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE	MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN DESCRIPTION

Pin Names	Description
A0–A2	Address Inputs
E1, E2	Enable Inputs (Active LOW)
E3	Enable Input (Active HIGH)
O0–O7	Outputs (Active LOW)

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FUNCTION TABLE

Inputs

Outputs

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ABSOLUTE MAXIMUM RATINGS(1)

Symbol	Rating	Commercial	Military	Unit
VTERM(2)	Terminal Voltage	–0.5 to +7.0	–0.5 to +7.0	V
	with Respect to
	GND
VTERM(3)	Terminal Voltage	–0.5 to	–0.5 to	V
	with Respect to	VCC +0.5	VCC +0.5
	GND
TA	Operating	0 to +70	–55 to +125	°C
	Temperature

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol	Parameter(1)	Conditions	Typ.	Max.	Unit
CIN	Input	VIN = 0V	6	10	pF
	Capacitance
COUT	Output	VOUT = 0V	8	12	pF
	Capacitance
NOTE:				2570 lnk 04

1. This parameter is measured at characterization but not tested.

TBIAS	Temperature	–55 to +125	–65 to +135	°C
	Under Bias
TSTG	Storage	–55 to +125	–65 to +150	°C
	Temperature
PT	Power Dissipation	0.5	0.5	W
IOUT	DC Output	–60 to +120	–60 to +120	mA
	Current
NOTES:			2570 lnk 03

1.Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. No terminal voltage may exceed VCC by +0.5V unless otherwise noted.

2.Input and VCC terminals only.

3.Outputs and I/O terminals only.

6.3

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