Texas Instruments CY74FCT16373ETPACT, CY74FCT16373ETPAC, CY74FCT16373CTPVCT, CY74FCT16373CTPVC, CY74FCT16373CTPACT Datasheet

Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered.

CY74FCT16373T

CY74FCT162373T

SCCS054 - August 1994 - Revised March 2000

16-Bit Latches

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

•VCC = 5V ± 10%

CY74FCT16373T Features:
• 64 mA sink current, 32 mA source current
• Typical V	(ground bounce) <1.0V at V	CC	= 5V,
OLP

TA = 25˚C

CY74FCT162373T Features:

•Balanced 24 mA output drivers

•Reduced system switching noise

• Typical V	(ground bounce) <0.6V at V	CC	= 5V,
OLP
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
																			SSOP/TSSOP
1	OE																		Top View
															1			1		48		1LE
1LE																OE
															1O1			2		47		1D1
1D1									D						1O2			3		46		1D2
														1O1	GND			4		45		GND
									C						1O3			5		44		1D3
															1O4			6		43		1D4
															VCC			7		42		VCC
															1O5			8		41		1D5
						TO 7 OTHER CHANNELS									1O6			9		40		1D6
															GND			10		39		GND
														FCT162373-1	1O7			11		38		1D7
															1O8			12		37		1D8
	2
		OE													2O1				13	36		2D1
																				35
															2O2				14			2D2
	2LE														GND				15	34		GND
															2O3				16	33		2D3
	2D1									D
																			17	32
														2O1	2O4							2D4
																			18	31
										C					VCC							VCC
															2O5				19	30		2D5
															2O6				20	29		2D6
															GND				21	28		GND
						TO 7 OTHER CHANNELS									2O7				22	27		2D7
															2O8				23	26		2D8
															2							2LE
														FCT162373-2		OE			24	25
																						FCT162373-3

Copyright © 2000, Texas Instruments Incorporated

CY74FCT16373T

CY74FCT162373T

Pin Description

	Name		Description
	D		Data Inputs
	LE		Latch Enable Inputs (Active HIGH)
			Output Enable Inputs (Active LOW)
	OE
	O		Three-State Outputs

Function Table[1]

	Inputs				Outputs
D	LE				O
			OE
H	H		L		H
L	H		L		L
X	L		L		Q0
X	X		H		Z

Electrical Characteristics Over the Operating Range

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		−55°C to +125°C
Power Applied.................................	Com’l
DC Input Voltage .................................................		−0.5V to +7.0V
DC Output Voltage ..............................................		−0.5V to +7.0V
DC Output Current		−60 to +120 mA
(Maximum Sink Current/Pin) ...........................
Power Dissipation ..........................................................		1.0W
Static Discharge Voltage............................................		>2001V

(per MIL-STD-883, Method 3015)

Operating Range

	Ambient
Range	Temperature	VCC
Industrial	−40°C to +85°C	5V ± 10%

Parameter		Description			Test Conditions			Min.	Typ.[4]	Max.	Unit
VIH		Input HIGH Voltage						2.0			V
VIL		Input LOW Voltage								0.8	V
VH		Input 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							±1	µA
IIL		Input LOW Current	VCC=Max., VI=GND							±1	µA
IOZH		High Impedance Output Current	VCC=Max., VOUT=2.7V							±1	µA
		(Three-State Output pins)
IOZL		High Impedance Output Current	VCC=Max., VOUT=0.5V							±1	µA
		(Three-State Output pins)
I	OS	Short Circuit Current[6]	V	CC	=Max., V		=GND	−80	−140	−200	mA
					OUT
I	O	Output Drive Current[6]	V	CC	=Max., V		=2.5V	−50		−180	mA
					OUT
I	OFF	Power-Off Disable	V	CC	=0V, V	≤4.5V[7]				±1	µA
					OUT

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.

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CY74FCT16373T

CY74FCT162373T

Output Drive Characteristics for CY74FCT162373T

Parameter

Description

Test Conditions

Min.

Typ.[4]

Max.

Unit

I

ODL

Output LOW Current[6]

V

CC

=5V, V

IN

=V

IH

or V

IL

, V

=1.5V

60

115

150

mA

OUT

I

ODH

Output HIGH Current[6]

V

CC

=5V, V

IN

=V

IH

or V

IL

, V

=1.5V

−60

−115

−150

mA

OUT

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] (T = +25˚C, f = 1.0 MHz)

A

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

Quiescent Power Supply Current

VCC=Max.

VIN≤0.2V,

5

500

µA

VIN≥VCC−0.2V

ICC

Quiescent Power Supply Current

VCC=Max.

VIN=3.4V[8]

0.5

1.5

mA

(TTL inputs HIGH)

ICCD

Dynamic Power Supply

VCC=Max., One Input

VIN=VCC or

60

100

µA/MHz

Current[9]

Toggling, 50% Duty Cycle,

VIN=GND

Outputs Open, OE=GND

IC

Total Power Supply Current[10]

VCC=Max., f1=10 MHz,

VIN=VCC or

0.6

1.5

mA

50% Duty Cycle, Outputs

VIN=GND

Open, One Bit Toggling,

VIN=3.4V or

0.9

2.3

mA

OE=GND, LE=VCC

VIN=GND

VCC=Max., f1=2.5 MHz,

VIN=VCC or

2.4

4.5[11]

mA

50% Duty Cycle, Outputs

VIN=GND

Open, Sixteen Bits Toggling,

VIN=3.4V or

6.4

16.5[11]

mA

OE=GND, LE=VCC

VIN=GND

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=	IQUIESCENT + IINPUTS + IDYNAMIC
IC	=	ICC+ 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

= 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.

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