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CY74FCT16374T Datasheet Preview

CY74FCT16374T Datasheet

16-Bit Registers

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1CY74FCT162374T

Data sheet acquired from Cypress Semiconductor Corporation.

Data sheet modiﬁed to remove devices not offered.

CY74FCT16374T

CY74FCT162374T

SCCS055C - August 1994 - Revised September 2001

16-Bit Registers

Features

• Ioff supports partial-power-down mode operation

• Edge-rate control circuitry for signiﬁcantly improved

noise characteristics

• Typical output skew < 250 ps

• ESD > 2000V

• TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)

packages

• Industrial temperature range of −40˚C to +85˚C

• VCC = 5V ± 10%

CY74FCT16374T Features:

• 64 mA sink current, 32 mA source current

• Typical VOLP (ground bounce) <1.0V at VCC = 5V,

TA = 25˚C

CY74FCT162374T Features:

• Balanced 24 mA output drivers

• Reduced system switching noise

• Typical VOLP (ground bounce) <0.6V at VCC = 5V,

TA= 25˚C

Functional Description

CY74FCT16374T and CY74FCT162374T are 16-bit D-type

registers designed for use as buffered registers in high-speed,

low power bus applications. These devices can be used as two

independent 8-bit registers or as a single 16-bit register by

connecting the output Enable (OE) and Clock (CLK) inputs.

Flow-through pinout and small shrink packaging aid in

simplifying board layout.

This device is fully speciﬁed for partial-power-down

applications using Ioff. The Ioff circuitry disables the outputs,

preventing damaging current backﬂow through the device

when it is powered down.

The CY74FCT16374T is ideally suited for driving

high-capacitance loads and low-impedance backplanes.

The CY74FCT162374T has 24-mA balanced output drivers

with current limiting resistors in the outputs. This reduces the

need for external terminating resistors and provides for

minimal undershoot and reduced ground bounce. The

CY74FCT162374T is ideal for driving transmission lines.

Logic Block Diagrams

1OE

1CLK

1D1

2OE

2CLK

1O1 2D1

2O1

TO 7 OTHER CHANNELS

FCT162374-1

TO 7 OTHER CHANNELS

FCT162374-2

Pin Configuration

SSOP/TSSOP

Top View

1OE

1O1

1O2

GND

1O3

1O4

VCC

1O5

1O6

GND

1O7

1O8

2O1

2O2

GND

2O3

2O4

VCC

2O5

2O6

GND

2O7

2O8

2OE

48 1CLK

47 1D1

46 1D2

45 GND

44 1D3

43 1D4

42 VCC

41 1D5

40 1D6

39 GND

38 1D7

37 1D8

36 2D1

35 2D2

34 GND

33 2D3

32 2D4

31 VCC

30 2D5

29 2D6

28 GND

27 2D7

26 2D8

25 2CLK

FCT162374-3

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CY74FCT16374T Datasheet Preview

CY74FCT16374T Datasheet

16-Bit Registers

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CY74FCT16374T

CY74FCT162374T

Function Table[1]

Inputs

D CLK

Outputs

OE O Function

H Z High-Z

L L Load

L H Register

Pin Description

Name

CLK

Description

Data Inputs

Clock Inputs

Three-State Output Enable Inputs (Active LOW)

Three-State Outputs

Maximum Ratings[2, 3]

(Above which the useful life may be impaired. For user

guidelines, not tested.)

Storage Temperature .............................. −55°C to +125°C

Ambient Temperature with

Power Applied .......................................... −55°C to +125°C

DC Input Voltage................................................. −0.5V to +7.0V

DC Output Voltage.............................................. −0.5V to +7.0V

DC Output Current

(Maximum Sink Current/Pin)............................−60 to +120 mA

Power Dissipation ..........................................................1.0W

Static Discharge Voltage............................................>2001V

(per MIL-STD-883, Method 3015)

Operating Range

Range

Industrial

Ambient

Temperature

−40°C to +85°C

VCC

5V ± 10%

Electrical Characteristics Over the Operating Range

Parameter

Description

VIH

VIL

VIK

IIH

IIL

IOZH

Input HIGH Voltage

Input LOW Voltage

Input Hysteresis[5]

Input Clamp Diode Voltage

Input HIGH Current

Input LOW Current

High Impedance Output Current

(Three-State Output pins)

IOZL High Impedance Output Current

(Three-State Output pins)

IOS Short Circuit Current[6]

IO Output Drive Current[6]

IOFF Power-Off Disable

Test Conditions

VCC=Min., IIN=−18 mA

VCC=Max., VI=VCC

VCC=Max., VI=GND

VCC=Max., VOUT=2.7V

VCC=Max., VOUT=0.5V

VCC=Max., VOUT=GND

VCC=Max., VOUT=2.5V

VCC=0V, VOUT≤4.5V[7]

Min.

2.0

Typ.[4]

100

−0.7

Max.

0.8

−1.2

±1

Unit

µA

±1 µA

−80 −140 −200 mA

−50 −180 mA

±1 µA

Output Drive Characteristics for CY74FCT16374T

Parameter

Description

Test Conditions

Min. Typ.[4] Max. Unit

VOH Output HIGH Voltage

VCC=Min., IOH=−3 mA

2.5 3.5

VCC=Min., IOH=−15 mA

2.4 3.5

VCC=Min., IOH=−32 mA

2.0 3.0

VOL Output LOW Voltage

VCC=Min., IOL=64 mA

0.2 0.55

Notes:

1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = HIGH Impedance. = LOW-to-HIGH Transition.

2. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature

range.

3. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.

4. Typical values are at VCC= 5.0V, TA= +25˚C ambient.

5. This parameter is speciﬁed but not tested.

6. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample

and hold techniques are preferable in order to minimize internal chip heating and more accurately reﬂect operational values. Otherwise prolonged shorting

of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter

tests, IOS tests should be performed last.

7. Tested at +25˚C.

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CY74FCT16374T Datasheet

16-Bit Registers

CY74FCT16374T Datasheet

16-Bit Registers

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