74FCT543ATSOG datasheet(4/7 Pages) IDT

4 / 7 page

INDUSTRIALTEMPERATURERANGE

IDT74FCT543AT/CT

FASTCMOSOCTALLATCHEDTRANSCEIVER

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

ICC

Quiescent Power Supply Current

VCC = Max.

—

0.5

TTL Inputs HIGH

VIN = 3.4V(3)

ICCD

Dynamic Power Supply

VCC = Max., Outputs Open

VIN = VCC

—

0.15

0.25

mA/

Current(4)

CEAB and OEAB = GND

VIN = GND

MHz

CEBA = VCC

One Input Toggling

50% Duty Cycle

Total Power Supply Current(6)

VCC = Max., Outputs Open

VIN = VCC

—

1.5

3.5

fCP = 10MHz (LEAB )VIN = GND

50% Duty Cycle

CEAB and OEAB = GND

CEBA = VCC

VIN = 3.4V

—

5.5

One Bit Toggling

VIN = GND

at fi = 5MHz

50% duty cycle

VCC = Max., Outputs Open

VIN = VCC

—

3.8

7.3(5)

fCP = 10MHz (LEAB )VIN = GND

50% Duty Cycle

CEAB and OEAB = GND

CEBA = VCC

VIN = 3.4V

—

16.3(5)

Eight Bits Toggling

VIN = GND

at fi = 2.5MHz

50% duty cycle

NOTES:

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

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 ΔICC formula. These limits are guaranteed but not tested.

6. IC = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC + ΔICC 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 = Output Frequency

Ni = Number of Outputs at fi

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

POWER SU PPLY CH ARACT ERI ST I CS

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