IDT74FCT139APB datasheet(4/6 Pages) IDT

Part #	IDT74FCT139APB

Description	FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE

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Manufacturer	IDT [Integrated Device Technology]

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7.4

4

IDT54/74FCT139/A/C

FAST CMOS DUAL 1-0F-4 DECODER WITH ENABLE

MILITARY AND COMMERCIAL TEMPERATURE RANGES

POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V

NOTES:

2605 tbl 04

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 (fCP/2 + 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 Output Transition Pair (HLH or LHL)

fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

fo = Output Frequency

NO = Number of Outputs at fo

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

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

NOTES:

2605 tbl 07

1. See test circuit and waveforms.

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

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

ICC

Quiescent Power Supply Current

VCC = Max.

VIN

≥ VHC; VIN ≤ VLC

—

0.2

1.5

mA

∆ICC

Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.

VIN = 3.4V(3)

—

0.5

2.0

mA

ICCD

Dynamic Power Supply

Current(4)

VCC = Max.

Outputs Open

One Bit Toggling

50% Duty Cycle

VIN

≥ VHC

VIN

≤ VLC

—

0.15

0.3

mA/

MHz

IC

Total Power Supply Current(6)

VCC = Max.

Outputs Open

fo = 10MHz

VIN

≥ VHC

VIN

≤ VLC

(FCT)

—

1.7

4.5

mA

50% Duty Cycle

One Output Toggling

VIN = 3.4V

VIN = GND

—

2.0

5.5

VCC = Max.

Outputs Open

fo = 10MHz

VIN

≥ VHC

VIN

≤ VLC

(FCT)

—

3.2

7.5(5)

50% Duty Cycle

One Output Toggling

on Each Decoder

VIN = 3.4V

VIN = GND

—

3.7

9.5(5)

IDT54/74FCT139

IDT54/74FCT139A

IDT54/74FCT139C

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

On

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

ns

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

ns

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