IDT74FCT621TLG [IDT]

Bus Transceiver, FCT Series, 1-Func, 8-Bit, True Output, CMOS, CQCC20, LCC-20;


型号：	IDT74FCT621TLG
厂家：	INTEGRATED DEVICE TECHNOLOGY
描述：	Bus Transceiver, FCT Series, 1-Func, 8-Bit, True Output, CMOS, CQCC20, LCC-20 输出元件逻辑集成电路
文件：	总6页 (文件大小：121K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

IDT54/74FCT621T/AT

FASTCMOSOCTALBUSTRANSCEIVER(OPENDRAIN)

MILITARYANDCOMMERCIALTEMPERATURERANGES

FAST CMOS

OCTAL BUS TRANSCEIVER

(OPEN DRAIN)

IDT54/74FCT621T/AT

DESCRIPTION:

FEATURES:

−

Std. and A speed grades

The IDT54/74FCT621T/AT is an octal transceiver with non-inverting

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

Extended commercial range of –40°C to +85°C

CMOS power levels

Open-Drainbus compatible outputs inbothsendandreceive directions.

The B bus outputs are capable of sinking 64mA providing very good

capacitivedrivecharacteristics. Theseoctalbustransceiversaredesigned

for asynchronous two-way communication between data buses. The

controlfunctionimplementationallowsformaximumflexibilityintiming.

True TTL input and output compatibility

•

VOH = 3.3V (typ.)

VOL = 0.3V (typ.)

−

Power off disable outputs permit “live insertion”

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, CERPACK and LCC packages

FUNCTIONALBLOCKDIAGRAM

GBA

GAB

A2-A8

B2-B8

SEVEN OTHER TRANSCEIVERS

MILITARY AND COMMERCIAL TEMPERATURE RANGES

AUGUST 1999

1999 Integrated Device Technology, Inc.

DSC-2538/6

IDT54/74FCT621T/AT

FASTCMOSOCTALBUSTRANSCEIVER(OPENDRAIN)

MILITARYANDCOMMERCIALTEMPERATURERANGES

PINCONFIGURATION

V^CC

GAB

A¹

INDEX

GBA

A²

20 19

A³

B¹

B²

B³

B⁴

B⁵

B²

A⁴

P20-1

D20-1

B³

A⁴

A⁵

A⁶

A⁷

A⁸

L20-2

A⁵

A⁶

A⁷

^SO20-215

B⁴

E20-1

B⁶

B⁷

11 12 13

B⁸

GND

LCC

TOP VIEW

DIP/ SOIC/ CERPACK

TOP VIEW

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

PINDESCRIPTION

Pin Names

Description

Symbol

Rating

Max.

Unit

(2)

VTERM

Terminal Voltage with Respect to GND

–0.5 to +7

GBA, GAB

A1 – A8

EnableInputs

(3)

VTERM

Terminal Voltage with Respect to GND –0.5 to VCC+0.5

AInputsorOpen-drainOutputs

BInputsorOpen-drainOutputs

TSTG

IOUT

Storage Temperature

DC Output Current

–65 to +150

–65 to +120

°C

B1 – B8

8T-link

NOTES:

FUNCTIONTABLE⁽¹⁾

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

EnableInputs

GBA

GAB

Function

B data to A bus

A data to B bus

OFF

rating conditions for extended periods may affect reliability.

terminal voltage may exceed Vcc by +0.5V unless otherwise noted.

2. Inputs and Vcc terminals only.

3. Outputs and I/O terminals only.

B data to A bus

A data to B bus

NOTE:

1. H = HIGH Voltage Level.

L = LOW Voltage Level.

OFF = HIGH if pull-up resistor is connected to Open-Drain output.

CAPACITANCE

(TA = +25 C, f = 1.0MHz)

Symbol

Parameter⁽¹⁾

Conditions

Typ.

Max. Unit

CIN

Input Capacitance

VIN = 0V

COUT

Output Capacitance

VOUT = 0V

8T-link

NOTE:

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

IDT54/74FCT621T/AT

FASTCMOSOCTALBUSTRANSCEIVER(OPENDRAIN)

MILITARYANDCOMMERCIALTEMPERATURERANGES

DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE

Following conditions Apply Unless Otherwise Specified:

Commercial: TA = –40°C to +85°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%

Symbol

VIH

VIL

IIH

Parameter

Input HIGH Level

Test Conditions⁽¹⁾

Min.

Typ.⁽²⁾

—

Max.

—

Unit

GuaranteedLogic HIGHLevel

InputLOWLevel

GuaranteedLogicLOWLevel

VCC = Max., VI = 2.7V

VCC = Max., VI = 0.5V

VCC = Max., VI = VCC (Max.)

VCC = Min., IN= –18mA

VCC = Max.

—

0.8

±1

InputHIGHCurrent⁽⁴⁾

InputLOWCurrent⁽⁴⁾

InputHIGHCurrent⁽⁴⁾

ClampDiodeVoltage

Output HIGH Current

—

µ A

IIL

—

±1

—

±1

VIK

IOH

–0.7

—

–1.2

VOH = Vcc (Max.)

µ A

VIN = VIH or VIL

VOL

IOFF

OutputLOWVoltage

(B Bus)

VCC = Min.

IOL = 48mA MIL.⁽³⁾

IOL = 64mA COM’L.

IOL = 32mA MIL.⁽³⁾

IOL = 48mA COM’L.

—

0.3

—

0.55

0.5

VIN = VIH or VIL

OutputLOWVoltage

(A Bus)

VCC = Min.

VIN = VIH or VIL

Input/OutputPowerOff

Leakage⁽⁴⁾

VCC = 0V, VIN or VO - 4.5V

±1

µ A

ICC

InputHysteresis

Quiescent Power Supply

Current

—

200

—

VCC = max., VIN = GND or Vcc

—

0.01

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. These are maximum IOL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and 384mA

for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously.

4. The test limit for this parameter is ±5µA at TA = –55°C.

IDT54/74FCT621T/AT

FASTCMOSOCTALBUSTRANSCEIVER(OPENDRAIN)

MILITARYANDCOMMERCIALTEMPERATURERANGES

POWERSUPPLYCHARACTERISTICS

Symbol

Parameter

Test Conditions⁽¹⁾

Min.

Typ.⁽²⁾

Max.

Unit

∆ICC

QuiescentPowerSupplyCurrent

TTL Inputs HIGH

VCC = Max.

VIN = 3.4V

—

0.5

(3)

ICCD

Dynamic Power Supply Current⁽⁴⁾

Vcc = Max.

VIN = VCC

—

0.15

0.25

mA/MHz

OutputsOpen

VIN = GND

GBA = GAB = GND or VCC

OneInputToggling

50% Duty Cycle

TotalPowerSupplyCurrent^(6,7)

Vcc = Max.

OutputsOpen

GBA = GAB = GND or VCC

OneBitToggling

at fi =10MHz

VIN = VCC

VIN = GND

—

1.5

1.8

3.5

4.5

VIN = 3.4V

VIN = GND

50% Duty Cycle

(5)

Vcc = Max.

OutputsOpen

GBA = GAB = GND or VCC

EightBitsToggling

at fi = 2.5MHz

VIN = VCC

VIN = GND

—

VIN = 3.4V

VIN = GND

14.0⁽⁵⁾

50% Duty Cycle

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 (fCP/2 + fiNi)

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)

fi = Input Frequency

Ni = Number of Inputs at fi

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

7. This test is performed with outputs tied to GND through a pull-down resistor.

SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE

IDT54/74FCT621T

IDT54/74FCT621AT

Com’l. Mil.

Max. Min.⁽²⁾Max. Unit

Com’l.

Min.⁽²⁾Max.

Mil.

Min.⁽²⁾Max.

Symbol

tPLH

Parameter

Condition⁽¹⁾

CL = 50pF

RL = 500Ω

Min.⁽²⁾

5.5

Propagation Delay A to B

5.5

1.5

5.5

1.5

5.5

1.5

5.5

1.5

8.5

12.5

5.5

1.5

5.5

1.5

5.5

1.5

5.5

1.5

13.5

9.5

6.8

5.5

1.5

5.5

1.5

5.5

1.5

5.5

1.5

12.5

7.6

tPHL

1.5

tPLH

Propagation Delay B to A

Propagation Delay GBA to A

Propagation Delay GAB to B

5.5

12.5

7.2

tPHL

1.5

6.4

tPLH

14.5

9.5

14.5

5.5

13.5

7.6

tPHL

8.5

1.5

6.8

tPLH

5.5

13.5

7.2

tPHL

1.5

6.4

NOTES:

1. See test circuit and waveforms.

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

IDT54/74FCT621T/AT

FASTCMOSOCTALBUSTRANSCEIVER(OPENDRAIN)

MILITARYANDCOMMERCIALTEMPERATURERANGES

TESTCIRCUITSANDWAVEFORMS

SWITCH POSITION

TEST CIRCUITS FOR ALL OUTPUTS

Test

Switch

Closed

Open

V CC

7.0V

Open Drain

Disable Low

Enable Low

All Other Tests

500Ω

V OUT

VIN

Pulse

D.U.T.

Generator

8-link

50pF

DEFINITIONS:

C^L= Load capacitance: includes jig and probe capacitance.

R^T= Termination resistance: should be equal to Z^OUTof the Pulse

Generator.

Octal link

PULSEWIDTH

SET-UP, HOLD, AND RELEASE TIMES

1.5V

DATA

INPUT

LOW-HIGH-LOW

tSU

1.5V

PULSE

1.5V

TIMING

INPUT

ASYNCHRONOUS CONTROL

tREM

PRESET

CLEAR

ETC.

1.5V

HIGH-LOW-HIGH

PULSE

1.5V

SYNCHRONOUS CONTROL

PRESET

1.5V

Octal link

CLEAR

CLOCK ENABLE

ETC.

tSU

Octal link

PROPAGATIONDELAY

ENABLEANDDISABLETIMES

ENABLE

DISABLE

SAME PHASE

INPUT TRANSITION

1.5V

CONTROL

INPUT

1.5V

tPLH

tPHL

tPZL

tPLZ

VOH

OUTPUT

3.5V

1.5V

3.5V

VOL

1.5V

VOL

OUTPUT

NORMALLY

LOW

SWITCH

CLOSED

tPLH

0.3V

tPZH

tPHZ

OPPOSITE PHASE

INPUT TRANSITION

1.5V

VOH

OUTPUT

NORMALLY

HIGH

SWITCH

OPEN

1.5V

Octal link

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control Disable-

HIGH

2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns

IDT54/74FCT621T/AT

FASTCMOSOCTALBUSTRANSCEIVER(OPENDRAIN)

MILITARYANDCOMMERCIALTEMPERATURERANGES

ORDERINGINFORMATION

IDT

FCT

Temperature Range

Family

DeviceType Package

Process

Blank

Commercial

MIL-STD-883, Class B

Plastic DIP (P20-1)

CERDIP (D20-1)

Small Outline IC (SO20-2)

Leadless Chip Carrier (L20-2)

CERPACK (E20-1)

621T

Octal Bus Transceiver (Open Drain)

621AT

Blank High Drive

–

55°C to +125°C

40°C to +85°C

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for SALES:

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www.idt.com*

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