CY74FCT273TSOCT datasheet(3/7 Pages) TI

Part #	CY74FCT273TSOCT

Description	8-Bit Register

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CY54/74FCT273T

3

Power Supply Characteristics

Parameter

Description

Test Conditions

Typ.[5]

Max.

Unit

ICC

Quiescent Power Supply Current

VCC=Max., VIN ≤ 0.2V, VIN ≥ VCC-0.2V

0.1

0.2

mA

∆I

CC

Quiescent Power Supply Current

(TTL inputs HIGH)

VCC=Max., VIN=3.4V, f1=0, Outputs Open

[8]

0.5

2.0

mA

ICCD

Dynamic Power Supply Current[9] VCC=Max., One Bit Toggling, 50% Duty Cycle,

Outputs Open, MR=VCC,

VIN ≤ 0.2V or VIN ≥ VCC-0.2V

0.06

0.12

mA/MHz

IC

Total Power Supply Current[10]

VCC=Max., f0=10 MHz, 50% Duty Cycle,

Outputs Open, One Bit Toggling at f1=5 MHz,

MR=VCC, VIN ≤ 0.2V or VIN ≥ VCC-0.2V

0.7

1.4

mA

VCC=Max., f0=10 MHz, 50% Duty Cycle,

Outputs Open, One Bit Toggling at f1=5 MHz,

MR=VCC, VIN=3.4V or VIN=GND

1.2

3.4

mA

VCC=Max., f0=10 MHz, 50% Duty Cycle,

Outputs Open, Eight Bits Toggling

at f1=2.5MHz, MR=VCC,

VIN ≤ 0.2V or VIN ≥ VCC-0.2V

1.6

3.2[11]

mA

VCC=Max., f0=10 MHz, 50% Duty Cycle,

Outputs Open, Eight Bits Toggling

at f1=2.5 MHz, MR=VCC,

VIN=3.4V or VIN=GND

3.9

12.2[11]

mA

Notes:

8.

Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.

9.

This parameter is not directly testable, but is derived for use in Total Power Supply calculations.

10. IC

=IQUIESCENT + IINPUTS + IDYNAMIC

IC

=ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)

ICC = Quiescent Current with CMOS input levels

∆I

CC = 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)

f0

= Clock frequency for registered devices, otherwise zero

f1

= Input signal frequency

N1 = Number of inputs changing at f1

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

11. Values for these conditions are examples of the ICC formula. These limits are speciﬁed but not tested.

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