CY74FCT16245ATPVC datasheet(4/17 Pages) TI

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CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

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

500

µA

∆I

Quiescent Power Supply Current

(TTL inputs HIGH)

VCC=Max.

VIN=3.4V

[10]

0.5

1.5

ICCD

Dynamic Power Supply

Current[11]

VCC=Max., One Input Toggling,

50% Duty Cycle, Outputs Open,

OE=DIR=GND

VIN=VCC or

VIN=GND

100

µA/MHz

Total Power Supply Current[12]

VCC=Max., f1=10 MHz,

50% Duty Cycle, Outputs Open,

One Bit Toggling,

OE=DIR=GND

VIN=VCC or

VIN=GND

0.6

1.5

VIN=3.4V or

VIN=GND

0.9

2.3

VCC=Max., f1=2.5 MHz, 50%

Duty Cycle, Outputs Open,

Sixteen Bits Toggling,

OE=DIR=GND

VIN=VCC or

VIN=GND

2.4

4.5[13]

VIN=3.4V or

VIN=GND

6.4

16.5[13]

Notes:

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

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

12. IC

=IQUIESCENT + IINPUTS + IDYNAMIC

=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)

= Duty Cycle for TTL inputs HIGH

= Number of TTL inputs at DH

ICCD = Dynamic Current caused by an input transition pair (HLH or LHL)

= Clock frequency for registered devices, otherwise zero

= Input signal frequency

= Number of inputs changing at f1

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

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

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