PI74FCT245T datasheet(3/4 Pages) PERICOM

Part #	PI74FCT245T

Description	Fast CMOS Octal Bidirectional Transceivers

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Manufacturer	PERICOM [Pericom Semiconductor Corporation]

Direct Link	http://www.pericom.com

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3 / 4 page

3

PS2012B

09/22/99

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PI74FCT245T/640T/645T

25OhmSeriesPI74FCT2245T/2640T/2645T

OctalBidirectionalTransceivers

PowerSupplyCharacteristics

Parameters Description

TestConditions(1)

Min.

Typ(2)

Max.

Units

ICC

Quiescent Power

VCC=Max.

VIN = GND or VCC

0.1

500

µA

Supply Current

∆ICC

Supply Current per

VCC=Max.,

VIN=3.4V(3)

0.5

2.0

mA

Input@TTLHIGH

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=GNDorVCC

One Input Toggling

50% Duty Cycle

IC

Total 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°Cambient.

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

∆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)

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.

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