Texas Instruments SN74BCT574DBR, SN74BCT574DW, SN74BCT574DWR, SN74BCT574N, SNJ54BCT574FK Datasheet

SN54BCT574, SN74BCT574

OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS

WITH 3-STATE OUTPUTS

SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• ESD Protection Exceeds 2000 V Per

MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)

• Full Parallel Access for Loading

• Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)

description

These 8-bit flip-flops feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. They are
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.

The eight flip-flops of the ′BCT574 are
edge-triggered D-type flip-flops. On the positive
transition of the clock (CLK) input, the Q outputs
will be set to the logic levels that were set up at the
data (D) inputs.

SN54BCT574 ...J OR W PACKAGE

SN74BCT574 . . . DW OR N PACKAGE

SN54BCT574 . . . FK PACKAGE

3D
4D
5D
6D
7D

(TOP VIEW)

1

OE

2

1D

3

2D

4

3D

5

4D

6

5D

7

6D

8

7D

9

8D

GND

10

(TOP VIEW)

2D1DOE

3 2 1 20 19

4
5
6
7
8

910111213

20
19
18
17
16
15
14
13
12
11

V

CC

V
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK

1Q

18
17
16
15
14

CC

2Q
3Q
4Q
5Q
6Q

A buffered output-enable (OE
to place the eight outputs in either a normal logic

) input can be used

8D

GND

CLK

8Q

7Q

state (high or low logic levels) or a high­impedance state. In the high-impedance state, the
outputs neither load nor drive the bus lines significantly . The high-impedance state and increased drive provide
the capability to drive bus lines without need for interface or pullup components.

The output enable (OE

) does not affect the internal operations of the flip-flops. Old data can be retained or new

data can be entered while the outputs are in the high-impedance state.
The SN54BCT574 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74BCT574 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

(each flip-flop)

INPUTS

OE CLK D

L ↑ H H
L ↑ LL
L H or L X Q

H X X Z

OUTPUT

Q

0

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1993, Texas Instruments Incorporated

2–1

SN54BCT574, SN74BCT574

UNIT

OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS

SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993

logic symbol

OE

CLK

1D
2D
3D
4D
5D
6D
7D
8D

†

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

†

1
11

2
3
4
5
6
7
8
9

EN

1D

C1

19
18
17
16
15
14
13
12

logic diagram (positive logic)

1

OE

11

CLK

1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q

1D

2

To Seven Other Channels

1D

C1

19

1Q

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

Supply voltage range, V

CC

Input voltage range, VI (see Note 1) – 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the disabled or power-off state, V
Voltage range applied to any output in the high state, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

O

Input clamp current, IIK (VI < 0) –30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Current into any output in the low state, I

: SN54BCT574 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

SN74BCT574 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54BCT574 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT574 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 and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

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

– 0.5 V to 5.5 V. . . . . . . . . . . . . . .

– 0.5 V to V

‡

CC

recommended operating conditions

V
V
V
I

IK

I

OH

I

OL

T

2–2

CC
IH
IL

A

Supply voltage 4.5 5 5.5 4.5 5 5.5 V
High-level input voltage 2 2 V
Low-level input voltage 0.8 0.8 V
Input clamp current –18 –18 mA
High-level output current –12 –15 mA
Low-level output current 48 64 mA
Operating free-air temperature –55 125 0 70 °C

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54BCT574 SN74BCT574

MIN NOM MAX MIN NOM MAX

SN54BCT574, SN74BCT574

PARAMETER

TEST CONDITIONS

UNIT

V

V

V

V

t

Set

CLK↑

ns

(INPUT)

(OUTPUT)

CLK

Q

ns

OE

Q

ns

OE

Q

ns

OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS

WITH 3-STATE OUTPUTS

SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993

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

SN54BCT574 SN74BCT574

MIN TYP†MAX MIN TYP†MAX

V

IK

V

OH

OL

I

I

I

IH

I

IL

‡

I

OS

I

OZH

I

OZL

I

CCL

I

CCH

I

CCZ

C

i

C

†

All typical values are at VCC = 5 V, TA = 25°C.

‡

Not more than one output should be tested at a time, and the duration of the test should not exceed one second.

o

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

IOH = –3 mA 2.4 3.3 2.4 3.3

VCC = 4.5 V

= 4.5

CC

VCC = 5.5 V, VI = 5.5 V 0.4 0.4 mA
VCC = 5.5 V, VI = 2.7 V 20 20 µA
VCC = 5.5 V, VI = 0.5 V –0.6 –0.6 mA
VCC = 5.5 V, VO = 0 –100 –225 –100 –225 mA
VCC = 5.5 V, VO = 2.7 V 50 50 µA
VCC = 5.5 V, VO = 0.5 V –50 –50 µA
VCC = 5.5 V, Outputs open 38.1 62 38.1 62 mA
VCC = 5.5 V, Outputs open 4.9 8 4.9 8 mA
VCC = 5.5 V, Outputs open 4.5 8 4.9 8 mA
VCC = 5 V, VI = 2.5 V or 0.5 V 5.5 pF
VCC = 5 V, VO = 2.5 V or 0.5 V 8 pF

IOH = –12 mA 2 3.2
IOH = –15 mA 2 3.1
IOL = 48 mA 0.38 0.55
IOL = 64 mA 0.42 0.55

V

timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)

f

clock

t

w

su

t

h

VCC = 5 V,

TA = 25°C
MIN MAX MIN MAX MIN MAX

Clock frequency 0 77 0 77 0 77 MHz
Pulse duration, CLK high or low 6.5 6.5 6.5 ns

up time, data before

Hold time, data after CLK↑ High or low 0 1 0 ns

High 4.5 4.5 4.5
Low 6 6 6

SN54BCT574 SN74BCT574

UNIT

switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C

PARAMETER

f

max

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

NOTE 2: Load circuits and voltage waveforms are shown in Section 1.

= 50 pF (unless otherwise noted) (see Note 2)

L

FROM

TO

VCC = 5 V,

TA = 25°C

MIN TYP MAX MIN MAX MIN MAX

77 77 77 MHz

2.2 6.5 8.6 2.2 11.2 2.2 10

2.8 6.1 8 2.8 9.7 2.8 8.9

2.5 6.4 8.1 2.5 10.9 2.5 10.4

3.7 7.3 9.2 3.7 11.3 3.7 10.9
1 4.4 7.4 1 8 1 7.5

1.3 4.2 5.8 1.3 7.1 1.3 6.4

SN54BCT574 SN74BCT574

UNIT

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–3

SN54BCT574, SN74BCT574
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS

SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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