CY74FCT162374ATPACT - Texas Instruments

16-Bit Registers

CY74FCT16374T

CY74FCT162374T

SCCS055C - August 1994 - Revised September 2001

Data sheet acquired from Cypress Semiconductor Corporation.

Data sheet modiﬁed to remove devices not offered.

1CY74FCT162374T

Features

•I

off 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

•V

CC = 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,

lowpowerbus applications.Thesedevicescanbe usedastwo

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 Pin Configuration

1OE

FCT162374-1

1CLK

1D11O1

TO 7 OTHER CHANNELS

2OE

FCT162374-2

2CLK

2D12O1

FCT162374-3

GND

1OE

SSOP/TSSOP

Top View

1O1

1O2

1O3

1O4

1D1

1D2

1D3

1D4

1CLK

GND

VCC

1O7

1O8

1O5

1O6

1D5

1D6

1D7

1D8

VCC

GND

2O3

2O4

2O1

2O2

2D1

2D2

2D3

2D4

GND

VCC

2O7

2O8

2O5

2O6

2D5

2D6

2D7

2D8

VCC

GND

2OE 2CLK

TO 7 OTHER CHANNELS

CY74FCT16374T

CY74FCT162374T

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)

Function Table[1]

Inputs Outputs FunctionD CLK OE O

X L H Z High-Z

X H H Z

L L L Load

H L H

L H Z

H H Z

Pin Description

Name Description

D Data Inputs

CLK Clock Inputs

OE Three-State Output Enable Inputs (Active LOW)

O Three-State Outputs

Operating Range

Range Ambient

Temperature VCC

Industrial −40°C to +85°C 5V ± 10%

Electrical Characteristics Over the Operating Range

Parameter Description Test Conditions Min. Typ.[4] Max. Unit

VIH Input HIGH Voltage 2.0 V

VIL Input LOW Voltage 0.8 V

VHInput Hysteresis[5] 100 mV

VIK Input Clamp Diode Voltage VCC=Min., IIN=−18 mA −0.7 −1.2 V

IIH Input HIGH Current VCC=Max., VI=VCC ±1µA

IIL Input LOW Current VCC=Max., VI=GND ±1µA

IOZH High Impedance Output Current

(Three-State Output pins) VCC=Max., VOUT=2.7V ±1µA

IOZL High Impedance Output Current

(Three-State Output pins) VCC=Max., VOUT=0.5V ±1µA

IOS Short Circuit Current[6] VCC=Max., VOUT=GND −80 −140 −200 mA

IOOutput Drive Current[6] VCC=Max., VOUT=2.5V −50 −180 mA

IOFF Power-Off Disable VCC=0V, VOUT≤4.5V[7] ±1µA

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 V

VCC=Min., IOH=−15 mA 2.4 3.5 V

VCC=Min., IOH=−32 mA 2.0 3.0 V

VOL Output LOW Voltage VCC=Min., IOL=64 mA 0.2 0.55 V

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.

CY74FCT16374T

CY74FCT162374T

Output Drive Characteristics for CY74FCT162374T

Parameter Description Test Conditions Min. Typ.[4] Max. Unit

IODL Output LOW Current[6] VCC=5V, VIN=VIH or VIL, VOUT=1.5V 60 115 150 mA

IODH Output HIGH Current[6] VCC=5V, VIN=VIH or VIL, VOUT=1.5V −60 −115 −150 mA

VOH Output HIGH Voltage VCC=Min., IOH=−24 mA 2.4 3.3 V

VOL Output LOW Voltage VCC=Min., IOL=24 mA 0.3 0.55 V

Capacitance[5] (TA = +25˚C, f = 1.0 MHz)

Parameter Description Test Conditions Typ.[4] Max. Unit

CIN Input Capacitance VIN = 0V 4.5 6.0 pF

COUT Output Capacitance VOUT = 0V 5.5 8.0 pF

Power Supply Characteristics

Parameter Description Test Conditions Typ.[4] Max. Unit

ICC QuiescentPowerSupplyCurrent VCC=Max. VIN≤0.2V,

VIN≥VCC−0.2V 5 500 µA

∆ICC QuiescentPowerSupplyCurrent

(TTL inputs HIGH) VCC=Max. VIN=3.4V[8] 0.5 1.5 mA

ICCD Dynamic Power Supply

Current[9] VCC=Max., One Input

Toggling, 50% Duty Cycle,

Outputs Open, OE=GND

VIN=VCC or

VIN=GND 60 100 µA/

MHz

ICTotal Power Supply Current[10] VCC=Max., f0=10 MHz,

f1=5 MHz, 50% Duty Cycle,

Outputs Open, One Bit

Toggling, OE=GND

VIN=VCC or

VIN=GND 0.6 1.5 mA

VIN=3.4V or

VIN=GND 1.1 3.0 mA

VCC=Max., f0=10 MHz,

f1=2.5 MHz, 50% Duty

Cycle,OutputsOpen,Sixteen

Bits Toggling, OE=GND

VIN=VCC or

VIN=GND 3.0 5.5[11] mA

VIN=3.4V or

VIN=GND 7.5 19.0[11] mA

Note:

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=I

QUIESCENT + IINPUTS + IDYNAMIC

IC=I

CC+∆ICCDHNT+ICCD(f0/2 + f1N1)

ICC = Quiescent Current with CMOS input levels

∆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)

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.

CY74FCT16374T

CY74FCT162374T

Switching Characteristics Over the Operating Range[12]

CY74FCT16374T

CY74FCT162374T CY74FCT16374AT

CY74FCT162374AT Fig.

No.[13]

Parameter Description Min. Max. Min. Max. Unit

tPLH

tPHL Propagation Delay

CLK to O 2.0 10.0 2.0 6.5 ns 1, 5

tPZH

tPZL Output Enable Time 1.5 12.5 1.5 6.5 ns 1, 7, 8

tPHZ

tPLZ Output Disable Time 1.5 8.0 1.5 5.5 ns 1, 7, 8

tSU Set-Up Time HIGH or LOW,

D to CLK 2.0 2.0 ns 4

tHHold Time HIGH or LOW,

D to CLK 1.5 1.5 ns 4

tWCLK Pulse Width

HIGH or LOW 5.0 5.0 ns 5

tSK(O) Output Skew[14] 0.5 0.5 ns

CY74FCT16374CT

CY74FCT162374CT Fig.

No.[13]

Parameter Description Min. Max. Unit

tPLH

tPHL Propagation Delay

CLK to O 2.0 5.2 ns 1, 5

tPZH

tPZL Output Enable Time 1.5 5.5 ns 1, 7, 8

tPHZ

tPLZ Output Disable Time 1.5 5.0 ns 1, 7, 8

tSU Set-Up Time HIGH or LOW,

D to CLK 2.0 ns 4

tHHold Time HIGH or LOW,

D to CLK 1.5 ns 4

tWCLK Pulse Width

HIGH or LOW 3.3 ns 5

tSK(O) Output Skew[14] 0.5 ns

Notes:

12. Minimum limits are speciﬁed but not tested on Propagation Delays.

13. See “Parameter Measurement Information” in the General Information section.

14. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.

CY74FCT16374T

CY74FCT162374T

Ordering Information CY74FCT16374T

Speed

(ns) Ordering Code Package

Name Package Type Operating

Range

5.2 CY74FCT16374CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16374CTPVC/PVCT O48 48-Lead (300-Mil) SSOP

6.5 CY74FCT16374ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16374ATPVC/PVCT O48 48-Lead (300-Mil) SSOP

10.0 CY74FCT16374TPVC/PVCT O48 48-Lead (300-Mil) SSOP Industrial

Ordering Information CY74FCT162374T

Speed

(ns) Ordering Code Package

Name Package Type Operating

Range

5.2 74FCT162374CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162374CTPVC O48 48-Lead (300-Mil) SSOP

74FCT162374CTPVCT O48 48-Lead (300-Mil) SSOP

6.5 74FCT162374ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162374ATPVC O48 48-Lead (300-Mil) SSOP

74FCT162374ATPVCT O48 48-Lead (300-Mil) SSOP

10.0 CY74FCT162374TPVC/PVCT O48 48-Lead (300-Mil) SSOP Industrial

CY74FCT16374T

CY74FCT162374T

Package Diagrams

48-Lead Shrunk Small Outline PackageO48

48-Lead Thin Shrunk Small Outline Package Z48

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

orders and should verify that such information is current and complete. All products are sold subject to TI’s terms

and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty . Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

and applications, customers should provide adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,

in which TI products or services are used. Information published by TI regarding third–party products or services

does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

Use of such information may require a license from a third party under the patents or other intellectual property

of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction

of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for

such altered documentation.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that

product or service voids all express and any implied warranties for the associated TI product or service and

is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265