PERICOM PI74FCT2245TH, PI74FCT2245TL, PI74FCT2245TP, PI74FCT2640TH, PI74FCT2640TL Datasheet

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PERICOM PI74FCT2245TH, PI74FCT2245TL, PI74FCT2245TP, PI74FCT2640TH, PI74FCT2640TL Datasheet

PI74FCT245T/640T/645T

PI74FCT2245T/2640T/2645T (25Ω Series)

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Fast CMOS Octal

Bidirectional Transceivers

ProductFeatures

PI74FCT245/640/645TandPI74FCT2245/2640T/2645Tarepin compatible with bipolar FAST™ Series at a higher speed and lower power consumption

25 Ohm series resistor on all outputs (FCT2XXX only)

TTL input and output levels

Low ground bounce outputs

Extremely low static power

Hysteresis on all inputs

Industrial operating temperature range: –40°C to +85°C

Packages available:

20-pin 173 mil wide plastic TSSOP (L)

20-pin 300 mil wide plastic DIP (P)

20-pin 150 mil wide plastic QSOP (Q)

20-pin 150 mil wide plastic TQSOP (R)

20-pin 300 mil wide plastic SOIC (S)

20-pin 209 mil wide plastic SSOP (H)

Device models available on request

Logic Block Diagram

T/R

OE

A0

B0

A1

B1

A2

B2

A3

B3

A4

B4

A5

B5

A6

B6

A7

B7

FCT245, 2245, 645, 2645 are non-inverting options.

FCT640 & FCT2640 are inverting options.

ProductDescription

Pericom Semiconductor’s PI74FCT series of logic circuits are produced using the Company’s advanced 0.6/0.8 micron CMOS technology, achieving industry leading speed grades. All PI74FCT2XXX devices have a built-in 25 Ohm series resistor on all outputs to reduce noise because of reflections, thus eliminating the need for an external terminating resistor.

ThePI74FCT245T/640T/645TandPI74FCT2245T/2640T/2645Tare 8-bit wide octal buffer bidirectional transceivers designed for asynchronous two-way communication between data buses. The transmit/receive (T/R) input determines the direction of data flow throughthebidirectionaltransceiver.Transmit(activeHIGH)enables data from A ports to B ports, and receive (active LOW) from B ports to A ports. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition.

ProductPinConfiguration

 

 

 

 

 

 

 

 

 

 

 

T/R

 

 

 

 

 

Vcc

1

 

20

 

A0

 

 

 

 

 

 

 

 

 

2

 

19

 

OE

A1

 

3

20-Pin

18

 

B0

 

 

A2

 

17

 

B1

 

4

 

A3

 

L,P,Q

16

 

B2

 

5

 

A4

 

R,S,H

15

 

B3

 

6

 

A5

 

 

14

 

B4

 

7

 

 

A6

 

8

 

13

 

B5

 

 

 

 

 

 

A7

 

 

12

 

B6

 

9

 

 

 

 

 

GND

 

 

11

 

B7

 

10

 

 

 

 

 

ProductPinDescription

PinName

Description

 

 

 

 

 

 

 

 

 

 

 

3-State Output Enable Inputs (Active LOW)

OE

 

 

 

 

 

 

 

 

 

 

T/R

Transmit/Receive Input

 

 

 

 

 

 

A0-A7

Side A Inputs or 3-State Outputs

 

 

 

 

 

 

B0-B7

Side B Inputs or 3-State Outputs

 

 

 

 

 

 

GND

Ground

 

 

 

 

 

 

VCC

Power

TruthTable(1)

 

Inputs

 

 

 

 

 

 

 

 

 

OE

 

T/R

Outputs

 

L

L

Bus B Data to Bus A(2)

 

L

H

Bus A Data to Bus B(2)

 

H

X

High Z State

1.H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance

2.640 is inverting from input to output.

1

PS2012B

09/22/99

PI74FCT245T/640T/645T 25 Ohm Series PI74FCT2245T/2640T/2645T OctalBidirectionalTransceivers

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MaximumRatings

(Above which the useful life may be impaired. For user guidelines, not tested.)

....................................................................Storage Temperature

–65°Cto+150°C

Ambient Temperature with Power Applied ....................................

–40°Cto+85°C

Supply Voltage to Ground Potential (Inputs & VCC Only) .............

–0.5Vto+7.0V

Supply Voltage to Ground Potential (Outputs & D/O Only) ...........

–0.5Vto+7.0V

DC Input Voltage ............................................................................

–0.5Vto+7.0V

DC Output Current ......................................................................................

120mA

Power Dissipation ..........................................................................................

0.5W

 

 

Note:

Stresses greater than those listed under 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.

DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, V CC = 5.0V ±5%)

Parameters

Description

Test Conditions(1)

 

Min.

Typ(2)

Max.

Units

VOH

Output HIGH Voltage

VCC = Min., VIN = VIH or VIL

IOH = –15.0mA

2.4

3.0

 

 

V

VOL

Output LOW Current

VCC = Min., VIN = VIH or VIL

IOL = 64mA

 

0.3

0.55

 

V

VOL

Output LOW Current

VCC = Min., VIN = VIH or VIL

IOL = 12mA (25Ω Series)

 

0.3

0.50

 

V

VIH

Input HIGH Voltage

Guaranteed Logic HIGH Level

 

2.0

 

 

 

V

 

 

 

 

 

 

 

 

 

VIL

Input LOW Voltage

Guaranteed Logic LOW Level

 

 

 

0.8

 

V

 

 

 

 

 

 

 

 

 

IIH

Input HIGH Current

(Except I/O pins) VCC = Max.

VIN = VCC

 

 

1

 

µA

IIL

Input LOW Current

(Except I/O pins) VCC = Max.

VIN = GND

 

 

–1

 

µA

IIH

Input HIGH Current

(I/O pins Only) VCC = Max.

VIN = VCC

 

 

1

 

µA

IIL

Input LOW Current

(I/O pins Only) VCC = Max.

VIN = GND

 

 

–1

 

µA

IOZH

High Impedance

VCC = MAX.

VOUT = 2.7V

 

 

1

 

µA

 

 

 

 

 

 

 

 

 

IOZL

Output Current

 

VOUT = 0.5V

 

 

–1

 

µA

VIK

Clamp Diode Voltage

VCC = Min., IIN = –18 mA

 

 

–0.7

–1.2

 

V

IOFF

Power Down Disable

VCC = GND, VOUT = 4.5V

 

— 100

µA

IOS

Short Circuit Current

VCC = Max.(3), VOUT = GND

 

–60

–120

 

 

mA

VH

Input Hysteresis

 

 

 

200

 

 

mV

Capacitance(TA = 25°C, f = 1 MHz)

Parameters(4)

Description

TestConditions

Typ.

Max.

Units

CIN

Input Capacitance

VIN =0V

6

10

pF

 

 

 

 

 

 

COUT

Output Capacitance

VOUT = 0V

8

12

pF

 

 

 

 

 

 

Notes:

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

2.Typical values are at VCC = 5.0V, +25°C ambient and maximum loading.

3.Not more than one output should be shorted at one time. Duration of the test should not exceed one second.

4.This parameter is determined by device characterization but is not production tested.

2

PS2012B

09/22/99

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