CY74FCT162373ATPAC - Texas Instruments

16-Bit Latches

CY74FCT16373T

CY74FCT162373T

SCCS054 - August 1994 - Revised March 2000

Data sheet acquired from Cypress Semiconductor Corporation.

Data sheet modiﬁed to remove devices not offered.

Features

• FCT-E speed at 3.4 ns

• Power-off disable outputs permits live insertion

• 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%

CY74FCT16373T Features:

• 64 mA sink current, 32 mA source current

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

TA = 25˚C

CY74FCT162373T Features:

• Balanced 24 mA output drivers

• Reduced system switching noise

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

TA= 25˚C

Functional Description

CY74FCT16373T and CY74FCT162373T are 16-bit D-type

latches designed for use in bus applications requiring high

speed and low power. These devices can be used as two

independent 8-bit latches or as a single 16-bit latch by

connecting the Output Enable (OE) and Latch (LE) inputs.

Flow-through pinout and small shrink packaging aid in

simplifying board layout. The output buffers are designed with

power-off disable feature that allows live insertion of boards.

The CY74FCT16373T is ideally suited for driving

high-capacitance loads and low-impedance backplanes.

The CY74FCT162373T 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

CY74FCT162373T is ideal for driving transmission lines.

Logic Block Diagrams Pin Configuration

1OE

FCT162373-1

1LE

1D11O1

TO 7 OTHERCHANNELS

2OE

FCT162373-2

2LE

2D12O1

GND

1OE

SSOP/TSSOP

Top View

1O1

1O2

1O3

1O4

1D1

1D2

1D3

1D4

1LE

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 2LE

FCT162373-3

TO 7 OTHERCHANNELS

CY74FCT16373T

CY74FCT162373T

Maximum Ratings[2, 3]

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

guidelines, not tested.)

Storage Temperature...................... Com’l −55°C to +125°C

Ambient Temperature with

Power Applied.................................Com’l −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)

Pin Description

Name Description

D Data Inputs

LE Latch Enable Inputs (Active HIGH)

OE Output Enable Inputs (Active LOW)

O Three-State Outputs

Function Table[1]

Inputs Outputs

D LE OE O

H H L H

L H L L

X L L Q0

X X H Z

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 CY74FCT16373T

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. Q0=Previous state of ﬂip-ﬂop.

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.

CY74FCT16373T

CY74FCT162373T

Output Drive Characteristics for CY74FCT162373T

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 QuiescentPowerSupply Current 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., f1=10 MHz,

50% Duty Cycle, Outputs

Open, One Bit Toggling,

OE=GND, LE=VCC

VIN=VCC or

VIN=GND 0.6 1.5 mA

VIN=3.4V or

VIN=GND 0.9 2.3 mA

VCC=Max., f1=2.5 MHz,

50% Duty Cycle, Outputs

Open,SixteenBitsToggling,

OE=GND, LE=VCC

VIN=VCC or

VIN=GND 2.4 4.5[11] mA

VIN=3.4V or

VIN=GND 6.4 16.5[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=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.

CY74FCT16373T

CY74FCT162373T

Switching Characteristics Over the Operating Range[12]

CY74FCT16373AT

CY74FCT162373AT

Parameter Description Min. Max. Unit Fig. No.[13]

tPLH

tPHL Propagation Delay D to O 1.5 5.2 ns 1, 3

tPLH

tPHL Propagation Delay

LE to O 2.0 6.7 ns 1, 5

tPZH

tPZL Output Enable Time 1.5 6.1 ns 1, 7, 8

tPHZ

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

tSU Set-Up Time HIGH or LOW, D to LE 2.0 ns 9

tHHold Time HIGH or LOW, D to LE 1.5 ns 9

tWLE Pulse Width HIGH 3.3 ns 5

tSK(O) Output Skew[14] 0.5 ns —

CY74FCT16373CT

CY74FCT162373CT CY74FCT16373ET

CY74FCT162373ET

Parameter Description Min. Max. Min. Max. Unit Fig. No.[13]

tPLH

tPHL Propagation Delay

D to O 1.5 4.2 1.5 3.4 ns 1, 3

tPLH

tPHL Propagation Delay

LE to O 2.0 5.5 2.0 3.7 ns 1, 5

tPZH

tPZL Output Enable Time 1.5 5.5 1.5 4.4 ns 1, 7, 8

tPHZ

tPLZ Output Disable Time 1.5 5.0 1.5 3.6 ns 1, 7, 8

tSU Set-Up Time HIGH or LOW, D to LE 2.0 1.0 ns 9

tHHold Time HIGH or LOW,

D to LE 1.5 1.0 ns 9

tWLE Pulse Width HIGH 3.3 3.0 ns 5

tSK(O) Output Skew[14] 0.5 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.

CY74FCT16373T

CY74FCT162373T

Ordering Information CY74FCT16373

Speed

(ns) Ordering Code Package

Name Package Type Operating

Range

3.4 CY74FCT16373ETPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16373ETPVC/PVCT O48 48-Lead (300-Mil) SSOP

4.2 CY74FCT16373CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16373CTPVC/PVCT O48 48-Lead (300-Mil) SSOP

5.2 CY74FCT16373ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16373ATPVC/PVCT O48 48-Lead (300-Mil) SSOP

Ordering Information CY74FCT162373

Speed

(ns) Ordering Code Package

Name Package Type Operating

Range

3.4 74FCT162373ETPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162373ETPVC O48 48-Lead (300-Mil) SSOP

74FCT162373ETPVCT O48 48-Lead (300-Mil) SSOP

4.2 74FCT162373CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162373CTPVC O48 48-Lead (300-Mil) SSOP

74FCT162373CTPVCT O48 48-Lead (300-Mil) SSOP

5.2 74FCT162373ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162373ATPVC O48 48-Lead (300-Mil) SSOP

74FCT162373ATPVCT O48 48-Lead (300-Mil) SSOP

CY74FCT16373T

CY74FCT162373T

Package Diagrams

48-Lead Shrunk Small Outline Package O48

48-Lead Thin Shrunk Small Outline Package Z48

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