Texas Instruments CY74FCT16240ETPVCT, CY74FCT16240ETPVC, CY74FCT16240ATPVCT, CY74FCT162240ETPVC, CY74FCT162240ETPAC Datasheet

16-Bit Buffers/Line Drivers

CY74FCT16240T

CY74FCT162240T

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

SCCS027 - August 1994 - Revised March 2000

Copyright © 2000, Texas Instruments Incorporated

1CY74FCT162240T

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

• V

CC

= 5V ± 10%

CY74FCT16240T Features:

• 64 mA sink current, 32 mA source current

• Typical V

OLP

(ground bounce)

<1.0V at VCC = 5V, TA = 25˚C

CY74FCT162240T Features:

• Balanced output drivers: 24 mA

• Reduced system switching noise

• Typical V

OLP

(ground bounce)

<0.6V at VCC = 5V, TA= 25˚C

Functional Description

These 16-bit buffer/line drivers are used 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-, 8-, or 16-bit
operation. The outputs are designed with a power-off disable
feature to allow for live insertion of boards.

The CY74FCT16240T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.

The CY74FCT162240T 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
CY74FCT162240T is ideal for driving transmission lines.

GND

Logic Block Diagrams Pin Configuration

1
2
3
4
5
6
7
8
9
10
11
12

33
32
31
30
29

25

26

27

28

36
35

1

OE

34

SSOP/TSSOP

Top View

FCT16240–1

1Y1

1Y2

1Y3

1Y4

13
14
15
16
17
18
19
20
21
22
23
24

45
44
43
42
41

37

38

39

40

48
47
46

1A1

1A2

1A3

1A4

1

OE

FCT16240–2

2Y1

2Y2

2Y3

2Y4

2A1

2A2

2A3

2A4

2

OE

1Y1
1Y2

1Y3
1Y4

1A1
1A2

1A3
1A4

2

OE

GND

GND

V

CC

2Y3
2Y4

2Y1
2Y2

2A1
2A2

2A3
2A4

V

CC

GND

GND

3Y3
3Y4

3Y1
3Y2

3A1
3A2

3A3
3A4

GND

GND

V

CC

4Y3
4Y4

4Y1
4Y2

4A1
4A2

4A3
4A4

V

CC

GND

3

OE

4

OE

FCT16240–3

3Y1

3Y2

3Y3

3Y4

3A1

3A2

3A3

3A4

3

OE

FCT16240–4

4Y1

4Y2

4Y3

4Y4

4A1

4A2

4A3

4A4

4

OE

FCT16240–5

CY74FCT16240T

CY74FCT162240T

2

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

(per MIL-STD-883, Method 3015) .............................>2001V

Pin Summary

Name Description

OE Three-State Output Enable Inputs (Active LOW)
A Data Inputs
Y Three-State Outputs

Function Table

[1]

Inputs Outputs

OE A Y

L L H
L H L

H X Z

Operating Range

Range Ambient Temperature V

CC

Industrial –40°C to +85°C 5V ± 10%

Electrical Characteristics Over the Operating Range

Parameter Description Test Conditions Min. Typ.

[4]

Max. Unit

V

IH

Input HIGH Voltage 2.0 V

V

IL

Input LOW Voltage 0.8 V

V

H

Input Hysteresis

[5]

100 mV

V

IK

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

I

IH

Input HIGH Current VCC= Max., VI= V

CC

±1 µA

I

IH

Input HIGH Current VCC= Max., VI= V

CC

±1 µA

I

IL

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

I

IL

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

I

OZH

High Impedance Output Current
(Three-State Output pins)

VCC= Max., V

OUT

= 2.7V ±1 µA

I

OZL

High Impedance Output Current
(Three-State Output pins)

VCC= Max., V

OUT

= 0.5V ±1 µA

I

OS

Short Circuit Current

[6]

VCC= Max., V

OUT

= GND –80 –140 –200 mA

I

O

Output Drive Current

[6]

VCC= Max., V

OUT

= 2.5V –50 –180 mA

I

OFF

Power-Off Disable VCC= 0V, V

OUT

≤ 4.5V

[7]

±1 µA

Output Drive Characteristics for CY74FCT16240T

Parameter Description Test Conditions Min. Typ.

[4]

Max. Unit

V

OH

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

V

OL

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.

2. Operation beyond the limits set forth may impair the useful life of the device. Unless 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 V

CC

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 temperaturewell abovenormal and therebycause invalidreadings in otherparametric tests. In any sequenceof parameter
tests, IOS tests should be performed last.

7. Tested at +25˚C.

CY74FCT16240T

CY74FCT162240T

3

Output Drive Characteristics for CY74FCT162240T

Parameter Description Test Conditions Min. Typ.

[4]

Max. Unit

I

ODL

Output LOW Current

[6]

VCC= 5V, VIN= VIH or VIL,V

OUT

= 1.5V 60 115 150 mA

I

ODH

Output HIGH Current

[6]

VCC= 5V, VIN= VIH or VIL, V

OUT

= 1.5V –60 –115 –150 mA

V

OH

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

V

OL

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

C

IN

Input Capacitance VIN = 0V 4.5 6.0 pF

C

OUT

Output Capacitance V

OUT

= 0V 5.5 8.0 pF

Power Supply Characteristics

Parameter Description Test Conditions Typ.

[4]

Max. Unit

I

CC

QuiescentPowerSupply Current VCC=Max. VIN≤0.2V,

V

IN≥VCC

–0.2V

5 500 µA

∆I

CC

QuiescentPowerSupplyCurrent
(TTL inputs HIGH)

VCC=Max. VIN=3.4V

[8]

0.5 1.5 mA

I

CCD

Dynamic Power Supply
Current

[9]

VCC=Max., One Input Tog­gling, 50% Duty Cycle, Out­puts Open,

OE=GND

VIN=VCC or
V

IN

=GND

60 100 µA/MHz

I

C

Total Power Supply Current

[10]

VCC=Max., f1=10 MHz, 50%
Duty Cycle, Outputs Open,
One Bit Toggling,

OE=GND

VIN=VCC or
V

IN

=GND

0.6 1.5 mA

VIN=3.4V or
V

IN

=GND

0.9 2.3 mA

VCC=Max., f1=2.5 MHz, 50%
Duty Cycle, Outputs Open,
Sixteen Bits Toggling,
OE=GND

VIN=VCC or
V

IN

=GND

2.4 4.5

[11]

mA

VIN=3.4V or
V

IN

=GND

6.4 16.5

[11]

mA

Notes:

8. Per TTL driven input (V

IN

=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. I

C

=I

QUIESCENT

+ I

INPUTS

+ I

DYNAMIC

IC=ICC+∆ICCDHNT+I

CCD(f0

/2 + f1N1)

I

CC

= Quiescent Current with CMOS input levels

∆I

CC

= Power Supply Current for a TTL HIGH input (VIN=3.4V)

D

H

= Duty Cycle for TTL inputs HIGH

N

T

= Number of TTL inputs at D

H

I

CCD

= Dynamic Current caused by an input transition pair (HLH or LHL)

f

0

= Clock frequency for registered devices, otherwise zero

f

1

= Input signal frequency

N

1

= Number of inputs changing at f

1

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.