IDT74FCT139ATSOB datasheet(3/5 Pages) IDT

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IDT54/74FCT139T/AT/CT

FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE

MILITARY AND COMMERCIAL TEMPERATURE RANGES

6.4

POWER SUPPLY CHARACTERISTICS

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

∆ICC

Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.

VIN = 3.4V(3)

—

0.5

2.0

ICCD

Dynamic Power Supply

Current(4)

VCC = Max.

Outputs Open

One Bit Toggling

50% Duty Cycle

VIN = VCC

VIN = GND

—

0.15

0.3

mA/

MHz

Total Power Supply Current(6)

VCC = Max.

Outputs Open

fo = 10MHz

VIN = VCC

VIN = GND

—

1.5

4.0

50% Duty Cycle

One Input and

One Output Toggling

VIN = 3.4V

VIN = GND

—

1.8

5.0

VCC = Max.

Outputs Open

fo = 10MHz

VIN = VCC

VIN = GND

—

3.0

7.0(5)

50% Duty Cycle

One Input Toggling

on Each Decoder

Two Outputs Toggling

VIN = 3.4V

VIN = GND

—

3.5

9.0(5)

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

NOTES:

2566 tbl 07

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

2566 tbl 06

NOTES:

1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at VCC = 5.0V, +25

°C ambient.

3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.

4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.

5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.

6. IC = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC +

∆ICC DHNT + ICCD (fONO)

ICC = Quiescent Current

∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)

DH = Duty Cycle for TTL Inputs High

NT = Number of TTL Inputs at DH

ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)

fO = Output Frequency

NO = Number of Outputs at fO

All currents are in milliamps and all frequencies are in megahertz.

FCT139T

FCT139AT

FCT139CT

Com'l.

Mil.

Com'l.

Mil.

Com'l.

Mil.

Parameter

Description

Condition(1)

Min.

(2)

Max. Min.

(2)

Max.

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

tPLH

tPHL

Propagation Delay

A0 or A1 to

CL = 50pF

RL = 500

Ω

1.5

9.0

1.5

12.0

1.5

5.9

1.5

7.8

1.5

5.0

1.5

6.2

tPLH

tPHL

Propagation Delay

E to On

1.5

8.0

1.5

9.0

1.5

5.5

1.5

7.2

1.5

4.8

1.5

5.8

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