CY74FCT16245ETPACT_技术文档

1CY74FCT16445T/2

H245T

Data sheet acquired from Cypress Semiconductor Corporation.

Data sheet modiﬁed to remove devices not offered.

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

SCCS026 - July 1994 - Revised March 2000

16-Bit Transceivers

Features

Functional Description

• 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

These 16-bit transceivers are designed for use in bidirectional

synchronous communication between two buses, where high

speed and low power are required. With the exception of the

CY74FCT16245T, these devices can be operated either as

two independent octals or a single 16-bit transceiver. Direction

of data ﬂow is controlled by (DIR), the Output Enable (OE)

transfers data when LOW and isolates the buses when HIGH.

The output buffers are designed with power off disable capa-

bility to allow for live insertion of boards.

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

• V_CC= 5V ± 10%

The CY74FCT16245T is ideally suited for driving

high-capacitance loads and low-impedance backplanes.

The CY74FCT162245T has 24-mA balanced output drivers

with current limiting resistors in the outputs. This reduces the

need for external terminating resistors and provides for mini-

mal undershoot and reduced ground bounce. The

CY74FCT162245T is ideal for driving transmission lines.

CY74FCT16245T Features:

• 64 mA sink current, 32 mA source current

• Typical V_OLP(ground bounce)<1.0V at V_CC= 5V,

T_A= 25˚C

CY74FCT162245T Features:

The CY74FCT162H245T 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.

• Balanced output drivers: 24 mA

• Reduced system switching noise

• Typical V_OLP(ground bounce) <0.6V at V_CC= 5V,

T_A= 25˚C

CY74FCT162H245T Features:

• Bus hold on data inputs

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

resistors

Logic Block Diagrams CY74FCT16245T,CY74FCT162245T,

CY74FCT162H245T

Pin Configuration

SSOP/TSSOP

Top View

DIR

2

1

OE

1

2

3

4

48

47

46

DIR

B

OE

1

2

1

A

1

2

A

1

2

B

A

2

GND

B

GND

A

45

44

43

42

41

B

1

2

1

5

6

7

8

9

1

3

4

1

3

A

2

1

2

B

A

4

1

V

CC

V

CC

1

2

16245T

162245T

B

A

5

1

5

6

1

A

3

A

3

162H245T

B

A

6

40

39

38

B

3

1

3

2

GND

10

11

B

A

7

1

7

8

1

A

4

1

4

2

B

A

8

12

13

37

36

35

34

B

4

B

5

1

4

5

2

B

A

1

2

1

2

14

15

16

17

18

A

2

A

5

2

1

5

GND

33

32

31

30

29

28

27

26

25

B

3

B

4

A

3

2

A

6

A

4

1

6

2

V

CC

B

6

B

7

B

8

1

6

7

8

2

A

5

19

20

21

22

23

24

2

5

6

2

A

7

B

A

6

1

7

2

GND

B

GND

A

2

7

8

2

7

A

8

B

A

1

8

2

8

DIR

OE

2

FCT16245–3

FCT16245–1

FCT16245–2

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

Maximum Ratings^{[3, 4]}

Pin Description

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

guidelines, not tested.)

Name

Description

OE

DIR

A

Three-State Output Enable Inputs (Active LOW)

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

Direction Control

Ambient Temperature with

Power Applied....................................Com’l -55°C to +125°C

Inputs or Three-State Outputs^[1]

DC Input Voltage ........................................... –0.5V to +7.0V

DC Output Voltage......................................... –0.5V to +7.0V

B

Function Table^[2]

DC Output Current

(Maximum Sink Current/Pin) ........................–60 to +120 mA

Inputs

Power Dissipation..........................................................1.0W

OE

L

DIR

L

Outputs

Static Discharge Voltage............................................>2001V

(per MIL-STD-883, Method 3015)

Bus B Data to Bus A

Bus A Data to Bus B

High Z State

L

H

Operating Range

H

X

Ambient

Range

Industrial

Temperature

V_CC

–40°C to +85°C

5V ± 10%

Notes:

1. On CY74FCT162H245T these pins have bus hold.

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

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 V_CCor ground.

Electrical Characteristics Over the Operating Range

Parameter

Description

Input HIGH Voltage

Test Conditions

Min.

Typ.^[5]

Max.

Unit

V

V_IH

V_IL

V_H

V_IK

I_IH

2.0

Input LOW Voltage

Input Hysteresis^[6]

0.8

V

100

mV

V

Input Clamp Diode Voltage

Input HIGH Current

V_CC=Min., I_IN=–18 mA

V_CC=Max., V_I=V_CC

–0.7

–1.2

±1

Standard

Bus Hold

Standard

Bus Hold

µA

±100

±1

I_IL

Input LOW Current

V_CC=Max., V_I=GND

µA

±100

I_BBH

I_BBL

Bus Hold Sustain Current on Bus Hold Input^[7]V_CC=Min.

V_I=2.0V

V_I=0.8V

–50

+50

I_BHHO

I_BHLO

Bus Hold Overdrive Current on Bus Hold Input^[7]V_CC=Max., V_I=1.5V

TBD

±1

mA

µA

I_OZH

High Impedance Output Current

(Three-State Output pins)

V_CC=Max., V_OUT=2.7V

V_CC=Max., V_OUT=0.5V

I_OZL

High Impedance Output Current

(Three-State Output pins)

±1

I_OS

I_O

Short Circuit Current^[8]

Output Drive Current^[8]

Power-Off Disable

V_CC=Max., V_OUT=GND

V_CC=Max., V_OUT=2.5V

V_CC=0V, V_OUT≤4.5V^[9]

–80

–50

–140

–200

–180

±1

mA

µA

I_OFF

2

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

Output Drive Characteristics for CY74FCT16245T

Parameter

Description

Test Conditions

V_CC=Min., I_OH=–3 mA

Min.

2.5

Typ.^[5]

3.5

Max.

Unit

V

V_OH

Output HIGH Voltage

V_CC=Min., I_OH=–15 mA

V_CC=Min., I_OH=–32 mA

V_CC=Min., I_OL=64 mA

2.4

3.5

V

2.0

3.0

V

V_OL

Output LOW Voltage

0.2

0.55

V

Output Drive Characteristics for CY74FCT162245T, CY74FCT162H245T

Parameter

I_ODL

Description

Output LOW Current^[8]

Output HIGH Current^[8]

Output HIGH Voltage

Output LOW Voltage

Test Conditions

V_CC=5V, V_IN=V_IHor V_IL, V_OUT=1.5V

V_CC=Min., I_OH=–24 mA

Min.

60

Typ.^[5]

115

Max.

150

Unit

mA

V

I_ODH

–60

2.4

–115

3.3

–150

V_OH

V_OL

V_CC=Min., I_OL=24 mA

0.3

0.55

V

Notes:

5. Typical values are at V_CC=5.0V, T_A=+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, I_OStests should be performed last.

9. Tested at +25˚C.

Capacitance^[6](T_A= +25˚C, f = 1.0 MHz)

Parameter

C_IN

Description

Input Capacitance

Output Capacitance

Test Conditions

Typ.^[5]Max.

Unit

pF

V_IN= 0V

4.5

5.5

6.0

8.0

C_OUT

V_OUT= 0V

pF

3

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

Power Supply Characteristics

Parameter

Description

Test Conditions

V_IN<0.2V,

Typ.^[5]

Max.

Unit

I_CC

Quiescent Power Supply Current V_CC=Max.

5

500

µA

V_IN>V_CC-0.2V

∆I_CC

Quiescent Power Supply Current V_CC=Max.

(TTL inputs HIGH)

V_IN=3.4V^[10]

0.5

60

1.5

mA

I_CCD

Dynamic Power Supply

Current^[11]

V_CC=Max., One Input Toggling, V_IN=V_CCor

50% Duty Cycle, Outputs Open, V_IN=GND

OE=DIR=GND

100

µA/MHz

I_C

Total Power Supply Current^[12]

V_CC=Max., f₁=10 MHz,

50% Duty Cycle, Outputs Open, V_IN=GND

One Bit Toggling,

OE=DIR=GND

V_IN=GND

V_IN=V_CCor

0.6

0.9

2.4

6.4

1.5

2.3

mA

V_IN=3.4V or

V_CC=Max., f₁=2.5 MHz, 50%

Duty Cycle, Outputs Open,

Sixteen Bits Toggling,

OE=DIR=GND

V_IN=V_CCor

V_IN=GND

4.5^[13]

16.5^[13]

V_IN=3.4V or

V_IN=GND

Notes:

10. Per TTL driven input (V_IN=3.4V); all other inputs at V_CCor GND.

11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.

12. I_C

I_C

= I_QUIESCENT+ I_INPUTS+ I_DYNAMIC

= I_CC+∆I_CCD_HN_T+I_CCD(f₀/2 + f₁N₁)

I_CC= Quiescent Current with CMOS input levels

∆I_CC= Power Supply Current for a TTL HIGH input (V_IN=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)

f₀

f₁

= Clock frequency for registered devices, otherwise zero

= Input signal frequency

N₁= Number of inputs changing at f₁

All currents are in milliamps and all frequencies are in megahertz.

13. Values for these conditions are examples of the I_CCformula. These limits are speciﬁed but not tested.

4

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

]

Switching Characteristics Over the Operating Range^[14]

74FCT16245T

74FCT162245T

74FCT16245AT

74FCT162245AT

74FCT162H245AT

Fig.

Parameter

t_PLH

t_PHL

Description

Min.

Max.

Min.

Max.

Unit

No.^[15]

Propagation Delay Data to Output

A to B, B to A

1.5

7.0

1.5

4.5

ns

1, 3

1, 7, 8

—

t_PZH

t_PZL

Output Enable Time

OE to A or B

1.5

9.5

7.5

9.5

7.5

0.5

1.5

6.2

5.0

6.2

5.0

0.5

ns

t_PHZ

t_PLZ

Output Disable Time

OE to A or B

t_PZH

t_PZL

Output Enable Time

DIR to A or B

t_PHZ

t_PLZ

Output Disable Time

DIR to A or B

Output Skew^[16]

t_SK(O)

74FCT16245CT

74FCT162245CT

74FCT162H245CT

74FCT16245ET

74FCT162245ET

74FCT162H245ET

Fig.

Parameter

t_PLH

t_PHL

t_PZH

t_PZL

t_PHZ

t_PLZ

t_PZH

t_PZL

t_PHZ

t_PLZ

Description

Min.

Max.

Min.

Max.

Unit

No.^[15]

Propagation Delay Data to Output

A to B, B to A

1.5

4.1

1.5

3.2

ns

1, 3

1, 7, 8

—

Output Enable Time

OE to A or B

1.5

5.8

4.8

5.8

4.8

0.5

1.5

4.4

4.0

4.8

4.0

0.5

ns

Output Disable Time

OE to A or B

Output Enable Time

DIR to A or B

Output Disable Time

DIR to A or B

Output Skew^[16]

t_SK(O)

Note:

14. Minimum limits are speciﬁed but not tested on Propagation Delays.

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

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

Ordering Information CY74FCT16245

Speed

(ns)

Package

Name

Operating

Range

Ordering Code

CY74FCT16245ETPACT

CY74FCT16245ETPVC/PVCT

CY74FCT16245CTPACT

CY74FCT16245CTPVC/PVCT

CY74FCT16245ATPACT

CY74FCT16245ATPVC/PVCT

CY74FCT16245TPACT

Package Type

48-Lead (240-Mil) TSSOP

3.2

4.1

4.5

7.0

Z48

O48

Z48

O48

Z48

O48

Z48

O48

Industrial

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

CY74FCT16245TPVC/PVCT

5

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

Ordering Information CY74FCT162245

Speed

Package

Name

Operating

Range

(ns)

Ordering Code

74FCT162245ETPACT

CY74FCT162245ETPVC

74FCT162245ETPVCT

CY74FCT162245CTPACT

CY74FCT162245CTPVC

74FCT162245CTPVCT

74FCT162245ATPACT

CY74FCT162245ATPVC

74FCT162245ATPVCT

CY74FCT162245TPACT

CY74FCT162245TPVC/PVCT

Package Type

48-Lead (240-Mil) TSSOP

3.2

Z48

O48

Z48

O48

Z48

O48

Z48

O48

Industrial

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

4.1

4.5

7.0

Ordering Information CY74FCT162H245

Speed

(ns)

Package

Operating

Range

Ordering Code

74FCT162H245ETPACT

CY74FCT162H245ETPVC

74FCT162H245ETPVCT

74FCT162H245CTPACT

CY74FCT162H245CTPVC

74FCT162H245CTPVCT

74FCT162H245ATPACT

CY74FCT162H245ATPVC

74FCT162H245ATPVCT

Name

Package Type

3.2

4.1

4.5

Z48

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

48-Lead (240-Mil) TSSOP

48-Lead (300-Mil) SSOP

Industrial

O48

Z48

O48

Z48

O48

6

CY74FCT16245T/2245T

CY74FCT16445T/2H245T

Package Diagrams

48-Lead Shrunk Small Outline Package O48

7

CY74FCT16245T

CY74FCT162245T

CY74FCT162H245T

Package Diagrams

48-Lead Thin Shrunk Small Outline Package Z48

8

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR

WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER

CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO

BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other

intellectual property right of TI covering or relating to any combination, machine, or process in which such

semiconductor products or services might be or are used. TI’s publication of information regarding any third

party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.


型号：	CY74FCT16245ETPACT
厂家：	TEXAS INSTRUMENTS
描述：	16-bIT TRANSCEI 16位TRANSCEI 总线驱动器总线收发器逻辑集成电路光电二极管
文件：	总9页 (文件大小：73K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CY74FCT16245ETPACT [TI]

相关型号：

CY74FCT16245ETPVC

CY74FCT16245ETPVC

CY74FCT16245ETPVC

CY74FCT16245ETPVCT

CY74FCT16245T

CY74FCT16245TPAC

CY74FCT16245TPAC

CY74FCT16245TPACR

CY74FCT16245TPACT

CY74FCT16245TPVC

CY74FCT16245TPVC/PVCT

CY74FCT16245TPVCR