CY74FCT16646CTPVC datasheet(5/9 Pages) TI

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CY74FCT16646T

CY74FCT162646T

Capacitance (TA = +25˚C, f = 1.0 MHz)

Symbol

Description[8]

Conditions

Typ.

Max.

Unit

CIN

Input Capacitance

VIN = 0V

4.5

6.0

COUT

Output Capacitance

VOUT =0V

5.5

8.0

Power Supply Characteristics

Parameter

Description

Test Conditions[10]

Min.

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

[11]

—

0.5

1.5

ICCD

Dynamic Power Supply

Current[12]

VCC=Max.

Outputs Open

DIR=OE=GND

One-Bit Toggling

50% Duty Cycle

VIN=VCC or

VIN=GND

—

120

µA/MHz

Total Power Supply Current[13]

VCC=Max.

Outputs Open

fo=10 MHz (CLKBA)

50% Duty Cycle

DIR=OE=GND

One-Bit Toggling

f1=5 MHz

50% Duty Cycle

VIN=VCC or

VIN=GND

—

0.8

1.7

VIN=3.4V or

VIN=GND

—

1.3

3.2

VCC=Max.

Outputs Open

fo=10 MHz (CLKBA)

50% Duty Cycle

DIR=OE=GND

Sixteen-Bits Toggling

f1=2.5 MHz

50% Duty Cycle

VIN=VCC or

VIN=GND

—

3.8

6.5[14]

VIN=3.4V or

VIN=GND

—

8.3

20.0[14]

Notes:

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

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

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

13. IC

=IQUIESCENT + IINPUTS + IDYNAMIC

=ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)

ICC

= Quiescent Current with CMOS input levels

∆I

= 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.

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

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