PI74FCT16373TA - PERICOM SEMICONDUCTOR

1PS2012E 08/08/06

Pin Configuration

Inputs

OE T/R Outputs

L L Bus B Data to Bus A

L H Bus A Data to Bus B

H X High Z State

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

Voltage Level, Z = High Impedance

Truth Table(1)

Pin Name Description

OE 3-State Output Enable Inputs (Active LOW)

T/R Transmit/Receive Input

A0-A7Side A Inputs or 3-State Outputs

B0-B7Side B Inputs or 3-State Outputs

GND Ground

VCC Power

Pin Description

Fast CMOS Octal Bidirectional Transceivers

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PI74FCT245T

PI74FCT2245T (25ΩΩ

ΩΩ

Ω Series)

Block Diagram

Description

Pericom Semiconductor’s PI74FCT245T and PI74FCT2245T are

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

through the bidirectional transceiver. Transmit (active HIGH) 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 Hi-Z condition.

PI74FCT2245T has 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.

Features

• Pin compatible with bipolar FAST™ Series at a higher speed

and lower power consumption

• 25-ohm series resistor on all outputs (FCT2245Tonly)

• 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

• Packaging (Pb-free & Green Available):

– 20-pin 173-mil wide plastic TSSOP (L)

– 20-pin 300-mil wide plastic SOIC (S)

– 20-pin 209-mil wide plastic SSOP (H)

– 20-pin 150-mil wide plastic QSOP (Q)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

T/R

A0

A1

A2

A3

A4

A5

A6

A7

GND

Vcc

OE

B0

B1

B2

B3

B4

B5

B6

B7

A0

B0

OE

A1

B1

A2

B2

A3

B3

A4

B4

A5

B5

A6

B6

A7

B7

T/R

06-0207

2PS2012E 08/08/06

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PI74FCT245T

PI74FCT2245T(25 Ohm Series )

Octal BidirectionalTransceivers

Storage Temperature .................................................................... –65°C to +150°C

Ambient Temperature with Power Applied .................................... –40°C to +85°C

Supply Voltage to Ground Potential (Inputs & VCC Only) ............. –0.5V to +7.0V

Supply Voltage to Ground Potential (Outputs & D/O Only) ........... –0.5V to +7.0V

DC Input Voltage ............................................................................ –0.5V to +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, VCC = 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 1μA

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 1μA

IIL Input LOW Current (I/O pins Only) VCC = Max. VIN = GND –1 μA

IOZH High Impedance VCC = MAX.V

OUT = 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

VHInput Hysteresis 200 mV

Capacitance (TA = 25°C, f = 1 MHz)

Parameters(1) Description Test Conditions Typ. Max. Units

CIN Input Capacitance VIN = 0V 6 10 pF

COUT Output Capacitance VOUT = 0V 8 12 pF

Notes:

1. These Parameters are determined by device characterization but are not production tested.

Maximum Ratings

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

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.

06-0207

3PS2012E 08/08/06

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PI74FCT245T

PI74FCT2245T(25 Ohm Series )

Octal BidirectionalTransceivers

Power Supply Characteristics

Parameters Description Test Conditions(1) Min. Typ(2) Max. Units

ICC Quiescent Power VCC = Max. VIN = GND or VCC 0.1 500 μA

Supply Current

ΔICC Supply Current per VCC = Max., VIN = 3.4V(3) 0.5 2.0 mA

Input @ TTL HIGH

ICCD Supply Current per VCC = Max., VIN = VCC 0.15 0.25 mA/

Input per MHz(4) Outputs Open VIN = GND MHz

OE = GND

T/R = GND or VCC

One Input Toggling

50% Duty Cycle

ICTotal Power Supply VCC = Max., VIN

= VCC 1.5 3.5(5) mA

Current(6) Outputs Open VIN = GND

fI = 10 MHZ

50% Duty Cycle VIN = 3.4V 1.8 4.5(5)

T/R = OE = GND VIN = GND

One Bit Toggling

VCC = Max., VIN = VCC 3.0 6.0(5)

Outputs Open VIN = GND

fI = 2.5 MHZ

50% Duty Cycle VIN = 3.4V 5.0 14.0(5)

T/R = OE = GND VIN = GND

Eight Bits Toggling

Notes:

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

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 + DICC DHNT + ICCD (fCP/2 + fINI)

ICC = Quiescent Current

ΔICC = 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)

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.

06-0207

4PS2012E 08/08/06

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PI74FCT245T

PI74FCT2245T(25 Ohm Series )

Octal BidirectionalTransceivers

Switching Characteristics over Operating Range

245T/2245T 245AT/2245AT 245CT/2245CT 245DT

Com. Com. Com. Com.

Parameters Description Conditions(1) Min. Max. Min. Max. Min. Max. Min Max. Unit

tPLH Propagation Delay CL = 50 pF 1.5(1) 7.0 1.5(1) 4.6 1.5(1) 4.1 1.5(1) 3.8 n s

tPHL A to B, B to A RL

= 500-ohm

tPZH Output Enable Time(2) 1.5 9.0 1.5 6.2 1.5 5.8 1.5 5.0 n s

tPZL OE to A or B

tPHZ Output Disable Time(2) 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 n s

tPLZ OE to A or B

tPZH Output Enable Time(2) 1.5 9.0 1.5 6.2 1.5 5.8 1.5 5.0 n s

tPZL T/R to A or B

tPHZ Output Disable Time(2) 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 n s

tPLZ T/R to A or B

Notes:

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

2. This parameter is guaranteed but not production tested.

Packaging Mechanical: 20-pin SOIC (S)

SEATING

PLANE

.050

BSC

1

20

0-8˚

.2914

.2992

X.XX

DENOTES CONTROLLING

DIMENSIONS IN MILLIMETERS

7.40

7.60

.496

.511

12.60

12.99

1.27

.0926

.1043

2.35

2.65 .394

.419

10.00

10.65

.0040

.0118

0.10

0.30

.013

.020

0.33

0.51

.010

.029

0.254

0.737

.0091

.0125

0.23

0.32

0.41

1.27

.016

.050

x 45˚

.020

.030

0.508

0.762 REF

06-0207

5PS2012E 08/08/06

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PI74FCT245T

PI74FCT2245T(25 Ohm Series )

Octal BidirectionalTransceivers

Packaging Mechanical: 20-pin QSOP (Q)

Packaging Mechanical: 20-Pin TSSOP (L)

.337

.344

.053

.069

.004

.010

SEATING

PLANE

.025

BSC

.007

.010

.228

.244

.150

.157

1

20

.016

.050

X.XX

DENOTES DIMENSIONS

IN MILLIMETERS

0.635

8.56

8.74

1.35

1.75

5.79

6.19

0.41

1.27

0.101

0.254

.008

.012

0.203

0.305

3.81

3.99

0.178

0.254

.058

1.47

.015 x 45˚

0.38

REF

Detail A

.008

0.20

MIN.

Guage Plane

.010

0.254

.041

1.04

REF

.016

.035

0.41

0.89

0˚-6˚

.008

.013

0.20

0.33

.252

.260

.047

1.20

.002

.006

SEATING

PLANE

.0256

BSC

.018

.030

.004

.008

.238

.269

1

20

.169

.177

0.05

0.15

6.1

6.7

0.45

0.75

0.09

0.20

4.3

4.5

6.4

6.6

0.65 0.19

0.30

.007

.012

Max

06-0207

6PS2012E 08/08/06

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PI74FCT245T

PI74FCT2245T(25 Ohm Series )

Octal BidirectionalTransceivers

Packaging Mechanical: 20-Pin SSOP (H)

.272

.295

.078

.002

SEATING

PLANE

.0098

Max.

.0256

BSC

.022

.037

.004

.009

.291

.322

1

20

.197

.220

0.25

0.050

7.40

8.20

0.55

0.95

0.09

0.25

5.00

5.60

2.00

6.90

7.50

0.65

Max

Min

PI74FCT245T Ordering Information

Ordering Code Package Code Speed Grade Package Type

PI74FCT245TQ Q Blank 20-pin QSOP

PI74FCT245TQE Q Blank Pb-free & Green, 20-pin QSOP

PI74FCT245TS S Blank 20-pin SOIC

PI74FCT245TSE S Blank Pb-free & Green, 20-pin SOIC

PI74FCT245ATLE L A Pb-free & Green, 20-pin TSSOP

PI74FCT245ATS S A 20-pin SOIC

PI74FCT245ATSE S A Pb-free & Green, 20-pin SOIC

PI74FCT245ATQ Q A 20-pin QSOP

PI74FCT245ATQE Q A Pb-free & Green, 20-pin QSOP

PI74FCT245CTH H C 20-pin SSOP

PI74FCT245CTHE H C Pb-free & Green, 20-pin SSOP

PI74FCT245CTS S C 20-pin SOIC

PI74FCT245CTSE S C Pb-free & Green, 20-pin SOIC

PI74FCT245CTQ Q C 20-pin QSOP

PI74FCT245CTQE Q C Pb-free & Green, 20-pin QSOP

PI74FCT245DTQ Q D 20-pin QSOP

PI74FCT245DTQE Q D Pb-free & Green, 20-pin QSOP

06-0207

7PS2012E 08/08/06

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PI74FCT245T

PI74FCT2245T(25 Ohm Series )

Octal BidirectionalTransceivers

Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com

PI74FCT2245T Ordering Information

Ordering Code Package Code Speed Grade Package Type

PI74FCT2245TQ Q Blank 20-pin QSOP

PI74FCT2245TQE Q Blank Pb-free & Green, 20-pin QSOP

PI74FCT2245TS S Blank 20-pin SOIC

PI74FCT2245TSE S Blank Pb-free & Green, 20-pin SOIC

PI74FCT2245ATS S A 20-pin SOIC

PI74FCT2245ATSE S A Pb-free & Green, 20-pin SOIC

PI74FCT2245ATQ Q A 20-pin QSOP

PI74FCT2245ATQE Q A Pb-free & Green, 20-pin QSOP

PI74FCT2245CTL L C 20-pin TSSOP

PI74FCT2245CTLE L C Pb-free & Green, 20-pin TSSOP

PI74FCT2245CTQ Q C 20-pin QSOP

PI74FCT2245CTQE Q C Pb-free & Green, 20-pin QSOP

PI74FCT2245DTSE S D Pb-free & Green, 20-pin SOIC

Notes:

•Thermal characteristics can be found on the company web site at www.pericom.com/packaging/

•E = Pb-free & Green

•Adding an X suffix = Tape/Reel

06-0207