PI74LPT244AH datasheet(4/8 Pages) PERICOM

Part #	PI74LPT244AH

Description	Fast CMOS 3.3V 8-Bit Buffer/Line Driver

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Manufacturer	PERICOM [Pericom Semiconductor Corporation]

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4 / 8 page

PI74LPT244

3.3V 8-Bit Buffer /Line Driver

4

PS2058F

06/05/06

Power Supply Characteristics

Parameters

Description

Test Conditions(1)

Min. Typ(2)

Max.

Units

ICC

Quiescent Power Supply

Current

VCC = Max.

VIN = GND

or VCC

0.1

10

µA

ΔICC

Quiescent Power Supply

Current

TTL Inputs HIGH

VCC = Max.

VIN = VCC

– 0.6V(3)

500

µA

ICCD

Dynamic Power Supply(4) VCC = Max.,

Outputs Open OEX = GND

One Bit Toggling

50% Duty Cycle

VIN = VCC

VIN = GND

50

75

µA/

MHz

IC

Total Power Supply

Current(6)

VCC = Max., Outputs

Open fI = 10 MHZ

50% Duty Cycle

OEX = GND

One Bit Toggling

VIN = VCC

– 0.6V

VIN = GND

0.6

2.3

mA

VCC = Max., Outputs

Open fI = 2.5 MHZ

50% Duty Cycle

OEX = GND

8 Bits Toggling

VIN = VCC

– 0.6V

VIN = GND

2.1

4.7(5)

mA

Notes:

1.

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

2.

Typical values are at Vcc = 3.3V, +25°C ambient.

3.

Per TTL driven input; 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 + ΔICC DHNT + ICCD (fCP/2 + fINI)

ICC = Quiescent Current (ICCL, ICCH and ICCZ)

ΔICC = Power Supply Current for a TTL High Input

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)

NCP = Number of Clock Inputs at fCP

fI = Input Frequency

NI = Number of Inputs at fI

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

Capacitance (TA = 25°C, f = 1 MHz)

Parameters(1)

Description

Test Conditions

Typ

Max.

Units

CIN

Input Capacitance

VIN = 0V

4.5

6

pF

COUT

Output Capacitance

VOUT = 0V

5.5

8

Notes:

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

06-0181

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