PI74LPT543 datasheet(4/5 Pages) PERICOM

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PS2062A 01/15/97

PI74LPT543

3.3V 8-BIT LATCHED TRANSCEIVER

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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

µA

∆ICC

Quiescent Power Supply Current

VCC = Max.

VIN = VCC – 0.6V(3)

2.0

µA

TTL Inputs HIGH

ICCD

Dynamic Power Supply

(4)

VCC = Max.,

VIN = VCC

µA/

Outputs Open

VIN = GND

MHz

CEAB and

OEAB = GND

CEBA = VCC

One Bit Toggling

50% Duty Cycle

Total Power Supply

VCC = Max.,

VIN = VCC – 0.6V

0.6

2.3

Current

(6)

Outputs Open

VIN = GND

fI = 10 MHZ

50% Duty Cycle

CEAB and

OEAB = GND

CEBA = VCC

One Bit Toggling

VCC = Max.,

VIN = VCC – 0.6V

2.1

4.7

(5)

Outputs Open

VIN = GND

fI = 2.5 MHZ

50% Duty Cycle

CEAB and

OEAB = GND

CEBA = VCC

8 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 = 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 +

∆ICC DHNT + ICCD (fCP/2 + fINI)

ICC = Quiescent Current (ICCL, ICCH and ICCZ)

∆ICC = 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.

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