Texas Instruments CY74FCT16244TPVCT, CY74FCT16244TPVC, CY74FCT16244TPACT, CY74FCT16244TPAC, CY74FCT16244ETPVCT Datasheet

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Texas Instruments CY74FCT16244TPVCT, CY74FCT16244TPVC, CY74FCT16244TPACT, CY74FCT16244TPAC, CY74FCT16244ETPVCT Datasheet

Data sheet acquired from Cypress Semiconductor Corporation.		CY74FCT16244T
Data sheet modiﬁed to remove devices not offered.
		CY74FCT162244T
		CY74FCT162H244T




	16-Bit Buffers/Line Drivers
SCCS028 - December 1987 - Revised March 2000

Features

•FCT-E speed at 3.2 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%

CY74FCT16244T Features:

• 64 mA sink current, 32 mA source current

• Typical V (ground bounce)

OLP

<1.0V at VCC = 5V, TA = 25˚C

CY74FCT162244T Features:

• Balanced output drivers: 24 mA

• Reduced system switching noise

• Typical V (ground bounce)

OLP

<0.6V at VCC = 5V, TA= 25˚C

CY74FCT162H244T Features:

•Bus hold on data inputs

•Eliminates the need for external pull-up or pull-down resistors

Functional Description

These 16-bit buffers/line drivers are designed for use in memory driver, clock driver, or other bus interface applications, where high-speed and low power are required. With ﬂow-through pinout and small shrink packaging board layout is simpliﬁed. The three-state controls are designed to allow 4-bit, 8-bit or combined 16-bit operation. The outputs are designed with a power-off disable feature to allow for live insertion of boards.

The CY74FCT16244T is ideally suited for driving high-capacitance loads and low-impedance backplanes.

The CY74FCT162244T 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 CY74FCT162244T is ideal for driving transmission lines.

The CY74FCT162H244T is a 24-mA balanced output part that has “bus hold” on the data inputs. The device retains the input’s last state whenever the input goes to high impedance. This eliminates the need for pull-up/down resistors and prevents ﬂoating inputs.

Logic Block Diagrams CY74FCT16244T, CY74FCT162244T,

Pin Configuration

CY74FCT162H244T

SSOP/TSSOP

Top View

1OE

3OE

1A1

1Y1

3A1

3Y1

1Y1

1A1

1Y2

1A2

3A2

GND

1Y2

3Y2

1Y3

16244T 44

1A3

1Y4

162244T

1A4

162H244T43

1A3

1Y3

3A3

3Y3

VCC

2Y1

2A1

1A4

3A4

2Y2

2A2

1Y4

3Y4

GND

FCT16244–1

FCT16244–2

2Y3

2A3

2Y4

2A4

3Y1

3A1

3Y2

3A2

2OE

4OE

GND

2A1

2Y1

4A1

4Y1

3Y3

3A3

3Y4

3A4

VCC

2A2

2Y2

4A2

4Y2

4Y1

4A1

4Y2

4A2

2A3

2Y3

4A3

4Y3

GND

4Y3

4A3

4Y4

4A4

2A4

2Y4

4A4

4Y4

FCT16244–3

FCT16244–4

FCT16244–5

CY74FCT16244T

CY74FCT162244T

CY74FCT162H244T

Pin Description

	Name	Description

		Three-State Output Enable Inputs (Active LOW)
	OE

A		Data Inputs[1]
Y		Three-State Outputs

Function Table[2]

	Inputs		Outputs

		A	Y
OE		A	Y

L		L	L

L		H	H

H		X	Z

Notes:

Maximum Ratings [3,4]

(Above which the useful life may be impaired. For user guidelines, not tested.)

Storage Temperature .................................	–55°C to +125°C
Ambient Temperature with	–55°C to +125°C
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)

Ordering Range

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

1.On CY74FCT162H244T these pins have “bus hold.”

2.H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Importance.

3.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.

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

Electrical Characteristics Over the Operating Range

Parameter

Description

Test Conditions

Min.

Typ.[5]

Max.

Unit

VIH

Input HIGH Voltage

2.0

VIL

Input LOW Voltage

0.8

Input Hysteresis[6]

100

VIK

Input Clamp Diode Voltage

VCC=Min., IIN=–18 mA

–0.7

–1.2

IIH

Input HIGH Current

Standard

VCC=Max., VI=VCC

±1

Bus Hold

±100

IIL

Input LOW Current

Standard

VCC=Max., VI=GND

±1

Bus Hold

±100

BBH

Bus Hold Sustain Current on Bus

Hold Input[7]

=Min.

=2.0V

–50

IBBL

VI=0.8V

+50

BHHO

Bus Hold Overdrive Current on Bus Hold Input[7]

=Max., V

=1.5V

TBD

IBHLO

IOZH

High Impedance Output Current

VCC=Max., VOUT=2.7V

±1

(Three-State Output pins)

IOZL

High Impedance Output Current

VCC=Max., VOUT=0.5V

±1

(Three-State Output pins)

Short Circuit Current[8]

=Max., V

=GND

–80

–140

–200

OUT

Output Drive Current[8]

VCC=Max., VOUT=2.5V

–50

–180

OFF

Power-Off Disable

=0V, V

≤4.5V[9]

±1

OUT

CY74FCT16244T

CY74FCT162244T

CY74FCT162H244T

Output Drive Characteristics for CY74FCT16244T

Parameter	Description	Test Conditions	Min.	Typ.[5]	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

Output Drive Characteristics for CY74FCT162244T, CY74FCT162H244T

Parameter

Description

Test Conditions

Min.

Typ.[5]

Max.

Unit

ODL

Output LOW Current[8]

=5V, V

or V

, V

=1.5V

115

150

OUT

ODH

Output HIGH Current[8]

=5V, V

or V

, V

=1.5V

–60

–115

–150

OUT

VOH

Output HIGH Voltage

VCC=Min., IOH=–24 mA

2.4

3.3

VOL

Output LOW Voltage

VCC=Min., IOL=24 mA

0.3

0.55

Notes:

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

6.This parameter is speciﬁed but not tested.

7.Pins with bus hold are described in Pin Description.

8.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.

9.Tested at +25˚C.

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