CY74FCT163827APVC/PVCT - Texas Instruments

20-Bit Buffe

CY74FCT163827

SCCS049 - March 1997 - Revised March 2000

Data sheet acquired from Cypress Semiconductor Corporation.

Data sheet modiﬁed to remove devices not offered.

Features

• Low power, pin-compatible replacement for LCX and

LPT families

• 5V tolerant inputs and outputs

• 24 mA & 6 mA balanced drive outputs

• Power-off disable outputs permits live insertion

• Edge-rate control circuitry for reduced noise

• FCT-C speed at 4.1 ns

• Latch-up performance exceeds JEDEC standard no. 17

• Typical output skew < 250 ps

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

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

• TypicalVolp(groundbounce)performanceexceedsMil

Std 883D

•V

CC = 2.7V to 3.6V

• ESD (HBM) > 2000V

Functional Description

The CY74FCT163827 is a 20-bit buffer/line driver that provides

high-performance bus interface buffering for wide data/address

paths or buses carrying parity. It can be used as a single 20-bit

bufferortwo10-bit buffers.Each10-bitbufferhasa pairofNANDed

OE f or increased fle xibility.

The CY74FCT163827 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 inputs

and outputs were designed to be capable of being driven by

5.0V buses, allowing its use in mixed voltage systems as a

translator. The outputs are also designed with a power-off

disable feature enabling its use in applications requiring live

insertion.

GND

Logic Block Diagrams CY74FCT163827 Pin Configuration

1OE1

SSOP/TSSOP

Top View

1Y1

1A1

1OE1

1Y1

1Y2

1Y3

1Y4

1A1

1A2

1A3

1A4

1OE2

GND

VCC

2Y3

2Y4

2Y1

2Y2

1A6

VCC

GND

2OE1

FCT163827-1

1OE2

TO 9 OTHER CHANNELS

2A1

2OE1

TO 9 OTHER CHANNELS

2OE2

2Y1

1Y5

1Y6

1Y7

1Y8

1Y9

1Y10

2Y5

2Y9

2Y7

2Y8

VCC

2Y6

2Y10

GND 25

1A5

1A7

1A9

1A8

1A10

2A3

2A4

2A2

GND

2A5

2A9

2A7

2A8

VCC

2A6

2A10

2A1

GND

2OE2

FCT163827-2

CY74FCT163827

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

Supply Voltage Range..................................... 0.5V to +4.6V

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

Pin Description

Name Description

OE Output Enable Inputs (Active LOW)

A Data Inputs

Y Three-State Outputs

Function Table[1]

Inputs Outputs

OE1OE2A Y

L L L L

L L H H

H X X Z

X H X Z Operating Range

Range Ambient

Temperature VCC

Commercial –40°C to +85°C 2.7V to 3.6V

Electrical Characteristics Over the Operating Range VCC=2.7V to 3.6V

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

VIH Input HIGH Voltage All Inputs 2.0 5.5 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=5.5 ±1µA

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

IOZH High Impedance Output Current

(Three-State Output pins) VCC=Max., VOUT=5.5V ±1µA

IOZL High Impedance Output Current

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

IOS Short Circuit Current[6] VCC=Max., VOUT=GND –60 –135 –240 mA

IOFF Power-Off Disable VCC=0V, VOUT≤4.5V ±100 µA

ICC Quiescent Power Supply Current VIN≤0.2V,

VIN>VCC–0.2V VCC=Max. 0.1 10 µA

∆ICC Quiescent Power Supply Current

(TTL inputs HIGH) VIN=VCC–0.6V[7] VCC=Max. 2.0 30 µA

Note:

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

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=3.3V, 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. Per TTL driven input; all other inputs at VCC or GND.

CY74FCT163827

Electrical Characteristics For Balanced Drive Devices Over the Operating Range VCC=2.7V to 3.6V

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

IODL Output LOW Dynamic Current[6] VCC=3.3V, VIN=VIH

or VIL, VOUT=1.5V 45 180 mA

IODH Output HIGH Dynamic Current[6] VCC=3.3V, VIN=VIH

or VIL, VOUT=1.5V –45 –180 mA

VOH Output HIGH Voltage VCC=Min., IOH= –0.1 mA VCC–0.2 V

VCC=Min., IOH= –8 mA 2.4[8] 3.0 V

VCC=3.0V, IOH= –24 mA 2.0 3.0 V

VOL Output LOW Voltage VCC=Min., IOL= 0.1mA 0.2 V

VCC=Min., IOL= 24 mA 0.3 0.55

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

Note:

8. VOH=VCC–0.6V at rated current.

Power Supply Characteristics

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

ICCD Dynamic Power Supply

Current[9] VCC=Max.,OneInputToggling,

50% Duty Cycle,

Outputs Open, OE=GND

VIN=VCC or

VIN=GND 50 75 µA/MHz

ICTotal Power Supply

Current[10] VCC=Max., f1=10 MHz, 50%

DutyCycle,OutputsOpen,One

Bit Toggling, OE=GND

VIN=VCC or

VIN=GND 0.5 0.8 mA

VIN=VCC–0.6V or

VIN=GND 0.5 0.8 mA

VCC=Max., f1=2.5 MHz, 50%

Duty Cycle, Outputs Open, Six-

teen Bits Toggling, OE=GND

VIN=VCC or

VIN=GND 2.0 3.0[11] mA

VIN=VCC–0.6V or

VIN=GND 2.0 3.3[11] mA

CY74FCT163827

Switching Characteristics Over the Operating Range VCC=3.0V to 3.6V[12,13]

Parameter Description

CY74FCT163827A CY74FCT163827C

Min. Max. Min. Max. Unit Fig. No.[14]

tPLH

tPHL Propagation Delay Data to

Output 1.5 4.8 1.5 4.1 ns 1, 3

tPZH

tPZL Output Enable Time 1.5 6.2 1.5 5.8 ns 1, 7, 8

tPHZ

tPLZ Output Disable Time 1.5 5.6 1.5 5.2 ns 1, 7, 8

tSK(O) Output Skew[15] 0.5 0.5 ns —

Notes:

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.

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

13. For VCC =2.7, propagation delay, output enable and output disable times should be degraded by 20%.

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

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

Ordering Information CY74FCT163827

Speed

(ns) Ordering Code Package

Name Package Type Operating

Range

4.1 CY74FCT163827CPACT Z56 56-Lead (240-Mil) TSSOP Commercial

CY74FCT163827CPVC/PVCT O56 56-Lead (300-Mil) SSOP

4.8 CY74FCT163827APVC/PVCT O56 56-Lead (300-Mil) SSOP Commercial

CY74FCT163827

Package Diagrams 56-Lead Shrunk Small Outline Package O56

56-Lead Thin Shrunk Small Outline Package Z56

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