Datasheet SN64BCT125AD, SN64BCT125ADR, SN64BCT125AN Datasheet (Texas Instruments)

SN64BCT125A

QUADRUPLE BUS BUFFER GATE

WITH 3-STATE OUTPUTS

SCBS052B – JULY 1990 – REVISED MAY 1994

Copyright  1994, Texas Instruments Incorporated

3–3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• High-Impedance State During Power-Up

and Power-Down

• 3-State Outputs Drive Bus Lines or

Buffer-Memory Address Registers

• ESD Protection Exceeds 2000 V

Per MIL-STD-883C Method 3015

• Package Options Include Plastic

Small-Outline (D) Packages and Standard
Plastic 300-mil DIPs (N)

description

The SN64BCT125A bus buffer features independent line drivers with 3-state outputs. Each output is disabled
when the associated output-enable (OE

) input is high.

The SN64BCT125A is characterized for operation from –40°C to 85°C and 0°C to 70°C.

FUNCTION TABLE

(each buffer)

INPUTS

OUTPUT

OE A

Y

L H H
L LL
H X Z

logic symbol

†

logic diagram (positive logic)

1Y

3

EN

1

1OE

2

1A

4
5

2A

10
9

3A

13
12

4A

2Y

6

3Y

8

4Y

11

2OE

3OE

4OE

1

4

56

2A 2Y

2OE

1

23

1A 1Y

1OE

10

98

3A 3Y

3OE

13

12 11

4A 4Y

4OE

†

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

D OR N PACKAGE

(TOP VIEW)

1
2
3
4
5
6
7

14
13
12
11
10

9
8

1OE

1A
1Y

2OE

2A
2Y

GND

V

CC

4OE
4A
4Y
3OE
3A
3Y

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.

SN64BCT125A
QUADRUPLE BUS BUFFER GATE
WITH 3-STATE OUTPUTS

SCBS052B – JULY 1990 – REVISED MAY 1994

3–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

†

Supply voltage range, V

CC

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

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

O

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

Voltage range applied to any output in the high state, V

O

– 0.5 V to V

CC

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

Current into any output in the low state 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range – 40°C to 85°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 voltage ratings may be exceeded if the input and output current ratings are observed.

recommended operating conditions

MIN NOM MAX UNIT

V

CC

Supply voltage 4.5 5 5.5 V

V

IH

High-level input voltage 2 V

V

IL

Low-level input voltage 0.8 V

I

IK

Input clamp current –18 mA

I

OH

High-level output current –15 mA

I

OL

Low-level output current 64 mA

T

A

Operating free-air temperature –40 85 °C

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

PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT

V

IK

VCC = 4.5 V, II = –18 mA –1.2 V

IOH = –3 mA 2.4 3.3

V

OH

V

CC

= 4.5

V

IOH = –15 mA 2 3.1

V

V

OL

VCC = 4.5 V, IOH = 64 mA 0.42 0.55 V

I

OZH

VCC = 5.5 V, VO = 2.7 V 50 µA

I

OZL

VCC = 5.5 V, VO = 0.5 V –50 µA
VCC = 0 to 1.3 V (power up)

"

50

I

OZ

VCC = 1.3 V to 0 (power down)

V

O

= 2.7 V or 0.5 V,

OE at 0.8 V

"

50

µ

A

I

I

VCC = 0, VI = 7 V 0.1 mA

I

IH

VCC = 5.5 V, VI = 2.7 V 25 µA

I

IL

VCC = 5.5 V, VI = 0.5 V –20 µA

I

OS

§

VCC = 5.5 V, VO = 0 –100 –225 mA

I

CCL

VCC = 5.5 V 46 49 mA

I

CCH

VCC = 5.5 V 19 31 mA

I

CCZ

VCC = 5.5 V 6 14 mA

C

i

VCC = 5 V, VI = 2.5 V or 0.5 V 4 pF

C

o

VCC = 5 V, VO = 2.5 V or 0.5 V 9 pF

‡

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.

SN64BCT125A

QUADRUPLE BUS BUFFER GATE

WITH 3-STATE OUTPUTS

SCBS052B – JULY 1990 – REVISED MAY 1994

3–5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

switching characteristics (see Note 2)

FROM

TO

VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,

VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω

PARAMETER

(INPUT) (OUTPUT)

R2

=

500 Ω

,

TA = 25°C

TA = –40°C

to 85°C

TA = 0°C

to 70°C

UNIT

MIN TYP MAX MIN MAX MIN MAX

t

PLH

1.6 3.5 5.2 1.6 6 1.6 5.7

t

PHL

A

Y

2.7 5 6.9 2.7 8 2.7 7.7

ns

t

PZH

3.4 6.7 9 3.4 11.1 3.4 10.3

t

PZL

OE

Y

5 8.2 10.4 5 12.8 5 11.7

ns

t

PHZ

3 5.8 7.4 3 9.4 3 8.9

t

PLZ

OE

Y

2.8 5.5 7.3 2.8 9.9 2.8 8.6

ns

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

SN64BCT125A
QUADRUPLE BUS BUFFER GATE
WITH 3-STATE OUTPUTS

SCBS052B – JULY 1990 – REVISED MAY 1994

3–6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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Copyright  1998, Texas Instruments Incorporated