SN74F174A [TI]

HEX D-TYPE FLIP-FLOP WITH CLEAR; 六路D型触发器与Clear


型号：	SN74F174A
厂家：	TEXAS INSTRUMENTS
描述：	HEX D-TYPE FLIP-FLOP WITH CLEAR 六路D型触发器与Clear 触发器
文件：	总5页 (文件大小：71K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SN74F174A

HEX D-TYPE FLIP-FLOP

WITH CLEAR

SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993

D OR N PACKAGE

(TOP VIEW)

• Contains Six Flip-Flops With Single-Rail

Outputs

• Buffered Clock and Direct Clear Inputs

• Applications Include:

Buffer/Storage Registers

Shift Registers

CLR

GND

CLK

Pattern Generators

• Fully Buffered Outputs for Maximum

Isolation From External Disturbances

• Package Options Include Plastic

Small-Outline Packages and Standard

Plastic 300-mil DIPs

description

This monolithic, positive-edge-triggered flip-flop utilizes TTL circuitry to implement D-type flip-flop logic with a

direct clear (CLR) input. Information at the data (D) inputs meeting the setup time requirements is transferred

to the outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level

and is not directly related to the transition time of the positive-going pulse. When the clock (CLK) input is at either

the high or low level, the D-input signal has no effect at the output.

The SN74F174A is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

(each flip-flop)

INPUTS

OUTPUT

CLR

CLK

↑

†

logic symbol

CLR

CLK

†

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

2–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN74F174A

HEX D-TYPE FLIP-FLOP

WITH CLEAR

SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993

logic diagram (positive logic)

CLK

CLR

Four Identical Channels

Not Shown

†

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V

Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.2 V to 7 V

Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA to 5 mA

Voltage applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V

Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA

Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C

Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: The input-voltage ratings may be exceeded provided the input-current ratings are observed.

recommended operating conditions

MIN NOM

MAX

UNIT

Supply voltage

4.5

5.5

High-level input voltage

Low-level input voltage

Input clamp current

0.8

–18

–1

°C

High-level output current

Low-level output current

Operating free-air temperature

2–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN74F174A

HEX D-TYPE FLIP-FLOP

WITH CLEAR

SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

†

PARAMETER

TEST CONDITIONS

MIN TYP

MAX

UNIT

= 4.5 V,

I = – 18 mA

– 1.2

= 4.5 V,

= 4.75 V,

= 4.5 V,

= 5.5 V,

= – 1 mA

= 20 mA

2.5

2.7

3.4

0.3

0.5

0.1

V = 7 V

µA

V = 2.7 V

V = 0.5 V

– 0.6

– 150

‡

= 0

– 60

See Note 2

See Note 3

CCH

CCL

†

‡

All typical values are at V

= 5 V, T = 25°C.

Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.

NOTES: 2. I

is measured with all outputs open, all data inputs and enable input at 4.5 V, and the clock input at 4.5 V after being momentarily

CCH

grounded.

is measured with all outputs open, all data inputs and enable input at 0 V, and the clock input at 4.5 V after being momentarily

CCL

grounded.

timing requirements

= 5 V,

= 25°C

= 4.5 V to 5.5 V,

T = MIN to MAX

UNIT

MIN

MAX

MIN

MAX

Clock frequency

Pulse duration

100

MHz

clock

CLK high

CLK low

CLR low

Data high or low

CLR high¶

Data high or low

4.5

Setup time before CLK↑

Hold time after CLK↑

0.5

For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

Inactive-state setup time is also referred to as recovery time.

switching characteristics (see Note 4)

= 5 V,

= 50 pF,

= 500 Ω,

= 25°C

= 4.5 V to 5.5 V,

= 50 pF,

FROM

PARAMETER

(OUTPUT)

= 500Ω,

= MIN to MAX

UNIT

(INPUT)

MIN

100

2.7

TYP

140

4.5

MAX

MIN

MAX

MHz

max

PLH

PHL

2.7

3.3

4.2

CLK

CLR

Any Q

3.4

4.2

6.3

NOTE 4: Load circuits and waveforms are shown in Section 1.

2–3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN74F174A

HEX D-TYPE FLIP-FLOP

WITH CLEAR

SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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.

SN74F174A [TI]

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