Datasheet 74LVT646PW, 74LVT646DB, 74LVT646D Datasheet (Philips)

INTEGRATED CIRCUITS

74LVT646

3.3V Octal bus transceiver/register
(3-State)

Product specification
Supersedes data of 1994 May 20
IC23 Data Handbook

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1998 Feb 19

Philips Semiconductors Product specification

74L VT6463.3V Octal bus transceiver/register (3-State)

FEA TURES

•Combines 74L VT245 and 74LVT574 type functions in one device

•Independent registers for A and B buses

•Multiplexed real–time and stored data

•Output capability: +64mA/–32mA

•TTL input and output switching levels

•Input and output interface capability to systems at 5V supply

•Bus-hold data inputs eliminate the need for external pull-up

resistors to hold unused inputs

•Live insertion/extraction permitted

•No bus current loading when output is tied to 5V bus

•Latch-up protection exceeds 500mA per JEDEC Std 17

•Power-up 3-State

•Power-up reset

•ESD protection exceeds 2000V per MIL STD 883 Method 3015

and 200V per Machine Model

QUICK REFERENCE DATA

SYMBOL PARAMETER

t

PLH

t

PHL

C

C
I

CCZ

IN

I/O

Propagation delay
An to Bn or Bn to An

Input capacitance
CP, S, OE, DIR

I/O capacitance Outputs disabled; V
Total supply current Outputs disabled; VCC = 3.6V 0.13 mA

DESCRIPTION

The LVT646 is a high-performance BiCMOS product designed for
V

operation at 3.3V .

CC

This device consists of bus transceiver circuits with 3-State outputs,
D-type flip-flops, and control circuitry arranged for multiplexed
transmission of data directly from the input bus or the internal
registers.

Data on the A or B bus will be clocked into the registers as the
appropriate clock pin goes High.

Output Enable (OE
transceiver function. In the transceiver mode, data present at the
high impedance port may be stored in either the A or B register or
both.

The Select (SAB, SBA) pins determine whether data is stored or
transferred through the device in real–time. The DIR determines
which bus will receive data when the OE

In the isolation mode (OE
the B register and/or data from Bus B may be stored in the A
register.

When an output function is disabled, the input function is still
enabled and may be used to store and transmit data. Only one of
the two buses, A or B may be driven at a time. The examples on the
next page demonstrate the four fundamental bus management
functions that can be performed with the 74LVT646.

CONDITIONS

T

= 25°C; GND = 0V

amb

CL = 50pF; VCC = 3.3V

V

= 0V or 3.0V 4 pF

I/O

) and DIR pins are provided to control the

is active (Low).

= High), data from Bus A may be stored in

TYPICAL UNIT

2.8

2.7

= 0V or 3.0V 10 pF

I/O

ns

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

24-Pin Plastic SOL –40°C to +85°C 74LVT646 D 74LVT646 D SOT163-1
24-Pin Plastic SSOP Type II –40°C to +85°C 74LVT646 DB 74LVT646 DB SOT399-1
24-Pin Plastic TSSOP Type I –40°C to +85°C 74LVT646 PW 74LVT646PW DH SOT360-1

PIN CONFIGURATION

1

CPAB

2

SAB

3

DIR

4

A0

5

A1

6

A2

7

A3

8

A4

9

A5

10

A6

11

A7

12

GND

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

SV00045

V

CC

CPBA
SBA
OE
B0
B1
B2
B3
B4
B5
B6
B7

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

1, 23

CPAB /

CPBA

2, 22 SAB / SBA

3 DIR Direction control input

4, 5, 6, 7, 8, 9, 10,

11

20, 19, 18, 17, 16,

15, 14, 13

A0 – A7

B0 – B7

21 OE
12 GND Ground (0V)

24 V

CC

A to B clock input / B to A
clock input

A to B select input / B to
A select input

Data inputs/outputs (A
side)

Data inputs/outputs (B
side)

Output enable input
(active-low)

Positive supply voltage

1998 Feb 19 853-1747 18987

2

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

LOGIC SYMBOL

3
23
22 SBA
21 OE

LOGIC DIAGRAM

4567891011

A0 A1 A2 A3 A4 A5 A6 A7

CPAB1
SAB2

DIR
CPBA

B0 B1 B2 B3 B4 B5 B6 B7

20 19 18 17 16 15 14 13

SV00046

LOGIC SYMBOL (IEEE/IEC)

21

3
23
22

1

2

4

5
6
7

8
9

10

11

G3
3EN1 [BA]
3EN2 [AB]
C4

G5
C6
G7

≥1

∇1

6D 7
17

54D
5

1

≥1

2∇

20

19

18

17

16

15

14

13

SV00047

OE

DIR

CPBA

SBA

CPAB

SAB

21

3
23
22

1

2

1of 8 Channels

4

A0

1D

C1

Q

5

A1

6

A2

7

A3

8

A4

9

A5

10

A6

11

A7

DETAIL A X 7

1D

C1

Q

20

B0

19

B1

18

B2

17

B3

16

B4

15

B5

14

B6

13

B7

1998 Feb 19

SV00048

3

Philips Semiconductors Product specification

OPERATING MODE

74LVT6463.3V Octal bus transceiver/register (3-State)

REAL TIME BUS TRANSFER

BUS B TO BUS A

A

B

}

OE DIR CPAB CPBA SAB SBA

LLXXXL

REAL TIME BUS TRANSFER

BUS A TO BUS B

A A A

B B B

STORAGE FROM

A, B, OR A AND B

}

OE DIR CPAB CPBA SAB SBA

LHXXLX

OE DIR CPAB CPBA SAB SBA

LH↑ XXX
LLX↑ XX
HX↑↑XX

FUNCTION TABLE

INPUTS DATA I/O

OE DIR CPAB CPBA SAB SBA An Bn

X X ↑ X X X Input

X
X

L
H

X
X

Unspecified

output*

Input Input

Output Input

Input Output

X X X ↑ X X
H

H
L

L
L

L

H = High voltage level
L = Low voltage level
X = Don’t care
↑ = Low-to-High clock transition
* The data output function may be enabled or disabled by various signals at the OE

data at the bus pins will be stored on every Low-to-High transition of the clock.

X
X

L
L

H
H

↑

H or L

X
X

X

H or L

↑

H or L

X

H or L

X
X

X
X

X
X

L
H

Unspecified

output*

Input Store B, A unspecified

TRANSFER STORED DA TA

}

Store A, B unspecified

Store A and B data
Isolation, hold storage

Real time B data to A bus
Stored B data to A bus

Real time A data to B bus
Stored A data to B bus

input. Data input functions are always enabled, i.e.,

TO A OR B

}

OE DIR CPAB CPBA SAB SBA

L L X H or L X H
L H H or L X H X

SV00049

1998 Feb 19

4

Philips Semiconductors Product specification

I

DC output current

mA

SYMBOL

PARAMETER

UNIT

I

mA

74LVT6463.3V Octal bus transceiver/register (3-State)

ABSOLUTE MAXIMUM RATINGS

SYMBOL

V

CC

I

IK

V

I

I

OK

V

OUT

DC supply voltage –0.5 to +4.6 V
DC input diode current VI < 0 –50 mA
DC input voltage
DC output diode current VO < 0 –50 mA
DC output voltage

PARAMETER CONDITIONS RATING UNIT

3

3

1, 2

–0.5 to +7.0 V

Output in Off or High state –0.5 to +7.0 V

Output in Low state 128

OUT

T

stg

p

Output in High state –64

Storage temperature range –65 to 150 °C

NOTES:

1. Stresses beyond those listed 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 .

2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.

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

RECOMMENDED OPERATING CONDITIONS

LIMITS

MIN MAX

V

CC

V

V

V

I

OH

OL

∆t/∆v Input transition rise or fall rate; Outputs enabled 10 ns/V

T

amb

DC supply voltage 2.7 3.6 V
Input voltage 0 5.5 V

I

High-level input voltage 2.0 V

IH

Input voltage 0.8 V

IL

High-level output current –32 mA
Low-level output current 32
Low-level output current; current duty cycle ≤ 50%, f ≥ 1kHz 64

Operating free-air temperature range –40 +85 °C

1998 Feb 19

5

Philips Semiconductors Product specification

Control pi

6

74LVT6463.3V Octal bus transceiver/register (3-State)

DC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL PARAMETER TEST CONDITIONS Temp = -40°C to +85°C UNIT

MIN

TYP

NO TAG

MAX

V

Input clamp voltage VCC = 2.7V; IIK = –18mA –0.9 –1.2 V

IK

VCC = 2.7 to 3.6V; IOH = –100µA VCC-0.2 VCC-0.1

V

High-level output voltage VCC = 2.7V; IOH = –8mA 2.4 2.5 V

OH

VCC = 3.0V; IOH = –32mA 2.0 2.2
VCC = 2.7V; IOL = 100µA 0.1 0.2
VCC = 2.7V; IOL = 24mA 0.3 0.5

V

Low–level output voltage VCC = 3.0V; IOL = 16mA 0.25 0.4 V

OL

VCC = 3.0V; IOL = 32mA 0.3 0.5
VCC = 3.0V; IOL = 64mA 0.4 0.55

V

RST

Power-up output low voltage5VCC = 3.6V; IO = 1mA; VI = GND or V

CC

VCC = 3.6V; VI = VCC or GND
VCC = 0 or 3.6V; VI = 5.5V

I

Input leakage current VCC = 3.6V; VI = 5.5V 1 20 µA

I

VCC = 3.6V; VI = V

CC

I/O Data pins

VCC = 3.6V; VI = 0 –1 -5

I

OFF

Output off current VCC = 0V; VI or VO = 0 to 4.5V 1 ±100 µA

VCC = 3V; VI = 0.8V 75 150

I

HOLD

Bus Hold current A inputs

VCC = 3V; VI = 2.0V –75 –150
VCC = 0V to 3.6V; VCC = 3.6V ±500

I

EX

I

PU/PD

I

CCH

I

CCL

I

CCZ

∆I

Current into an output in the
High state when VO > V

Power up/down 3-State output

3

current

CC

VO = 5.5V; VCC = 3.0V 60 125 µA

VCC ≤ 1.2V; VO = 0.5V to VCC; VI = GND or VCC;
OE/OE =Don’t care

VCC = 3.6V; Outputs High, VI = GND or V

Quiescent supply current VCC = 3.6V; Outputs Low, VI = GND or V

VCC = 3.6V; Outputs Disabled; VI = GND or V

Additional supply current per

CC

input pin

2

VCC = 3V to 3.6V; One input at VCC-0.6V,
Other inputs at VCC or GND

I

0 0.13 0.19

CC,

O =

I

0 3 12 mA

CC,

O =

I

CC,

O =

NOTES:

1. All typical values are at and T

2. This is the increase in supply current for each input at the specified voltage level other than V

3. This parameter is valid for any V
transition time of 100µsec is permitted. This parameter is valid for T

4. Unused pins at V

5. For valid test results, data must not be loaded into the flip-flops (or latches) after applying power.

or GND.

CC

= 25°C.

amb

between 0V and 1.2V with a transition time of up to 10msec. From V

CC

= 25°C only.

amb

CC

6. This is the bus hold overdrive current required to force the input to the opposite logic state.

0.13 0.55 V

ns

4

±0.1 ±1

1 10

0.1 1

15 ±100 µA

0 0.13 0.19

0.1 0.2 mA

or GND

= 1.2V to VCC = 3.3V ± 0.3V a

CC

µA

1998 Feb 19

6

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

AC CHARACTERISTICS

GND = 0V, tR = tF = 2.5ns, CL = 50pF, RL = 500Ω; T

SYMBOL PARAMETER WAVEFORM VCC = 3.3V ± 0.3V VCC = 2.7V UNIT

f

MAX

t

PLH

t

PHL

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

t

PZH

t

PZL

t

PHZ

t

PLZ

Maximum clock frequency 1 150 180 MHz
Propagation delay

CPAB to Bn or CPBA to An
Propagation delay

An to Bn or Bn to An
Propagation delay

SAB to Bn or SBA to An
Output enable time

OE to An or Bn
Output disable time

OE to An or Bn
Output enable time

DIR to An or Bn
Output disable time

DIR to An or Bn

NOTE:

1. All typical values are at V

= 3.3V and T

CC

amb

= –40°C to +85°C.

amb

= 25°C.

LIMITS

3.8

3.8

2.8

2.7

3.7

3.8

4.0

4.1

4.3

3.8

3.4

3.4

4.1

3.5

1

MAX MAX

5.7

5.7

4.7

4.6

6.2

6.2

5.8

6.0

6.5

5.8

6.5

6.3

7.2

5.8

6.7

6.4

5.4

5.3

7.2

6.8

7.2

7.3

6.9

5.9

7.5

7.1

8.1

6.3

ns

ns

ns

ns

ns

ns

ns

MIN TYP

1

2
2

3
5

6
5

6
5

6
5

6

1.8

2.1

1.3

1.0

1.4

1.4

1.0

1.0

2.3

2.2

1.0

1.2

1.7

1.5

AC SETUP REQUIREMENTS

GND = 0V, tR =2.5ns, tF = 2.5ns, CL = 50pF, RL = 500Ω; T

SYMBOL PARAMETER WAVEFORM VCC = 3.3V± 0.3V VCC = 2.7V UNIT

ts(H)
ts(L)

th(H)
th(L)

tw(H)
tw(L)

Setup time
An to CPAB, Bn to CPBA

Hold time
An to CPAB, Bn to CPBA

Pulse width, High or Low
CPAB or CPBA

1

1

NOTE:

1. This data sheet limit may vary among suppliers.

= –40°C to +85°C

amb

4

4

1

LIMITS

Min Typ Min

1.5

2.0

0.0

0.0

3.3

3.3

1.0

1.0

–1.0
–1.0

1.0

2.0

1.6

2.4

0.0

0.0

3.3

3.3

ns

ns

ns

1998 Feb 19

7

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

AC WAVEFORMS

VM = 1.5V, VIN = GND to 2.7V

1/f

CPBA or

CPAB

An or Bn

MAX

1.5V

tw(H) tw(L)

t

PHL

1.5V 1.5V

1.5V 1.5V

t

PLH

2.7V

V

V

SV00050

0V

OH

OL

Waveform 1. Propagation Delay, Clock Input to Output, Clock

Pulse Width, and Maximum Clock Frequency

2.7V

SBA or SAB

An or Bn

V

M

t

PLH

V

M

t

PHL

V

M

V

M

0V

V

V

SV00121

OH

OL

Waveform 2. Propagation Delay, SAB to Bn or SBA to An, An

to Bn or Bn to An

An

or

Bn

CPBA

or

CPAB

1.5V1.5V

(H)

t

s

t

(H)

h

1.5V 1.5V

(L)

t

s

1.5V1.5V

2.7V

0V

t

(L)

h

2.7V

0V

NOTE: The shaded areas indicate when the input is permitted

to change for predictable output performance.

SV00123

Waveform 4. Data Setup and Hold Times

VOH –0.3V

SV00124

2.7V

0V

V

0V

OH

OE, DIR

DIR

An or Bn

1.5V 1.5V

t

PZH

1.5V

t

PHZ

Waveform 5. 3-State Output Enable Time to High Level and

Output Disable Time from High Level

SBA or SAB

An or Bn

1.5V 1.5V

t

PHL

1.5V 1.5V

t

PLH

SV00122

Waveform 3. Propagation Delay, SBA to An or SAB to Bn

1998 Feb 19

2.7V

0V

V

V

3V

VOL +0.3V

V

SV00125

2.7V

0V

OL

, DIR

OE

DIR

OH

An or Bn

OL

1.5V 1.5V

t

PZL

1.5V

t

PLZ

Waveform 6. 3-State Output Enable Time to Low Level and

Output Disable Time from Low Level

8

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

TEST CIRCUIT AND WAVEFORM

V

CC

PULSE

GENERATOR

V

IN

D.U.T.

R

T

V

OUT

R

L

C

L

R

L

Test Circuit for 3-State Outputs

SWITCH POSITION

TEST SWITCH

t

PLH/tPHL

t

PLZ/tPZL

t

PHZ/tPZH

DEFINITIONS

RL = Load resistor; see AC CHARACTERISTICS for value.

= Load capacitance includes jig and probe capacitance;

C

L

see AC CHARACTERISTICS for value.

= T ermination resistance should be equal to Z

R

T

pulse generators.

Open

6V

GND

OUT

of

6.0V

GND

Open

NEGATIVE
PULSE

POSITIVE
PULSE

FAMILY

74LVT

t

90%

10%

V

M

10% 10%

t

THL

t

TLH

90% 90%

V

M

W

(tF)

(tR)t

t

W

90%

V

M

V

M

10%

VM = 1.5V

Input Pulse Definition

INPUT PULSE REQUIREMENTS

Amplitude Rep. Rate t

t

W

2.7V 10MHz 500ns 2.5ns 2.5ns

AMP (V)

0V

(tR)

t

TLH

(tF)

THL

AMP (V)

0V

t

R

F

SV00092

1998 Feb 19

9

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

SO24: plastic small outline package; 24 leads; body width 7.5 mm SOT137-1

1998 Feb 19

10

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

SSOP24: plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1

1998 Feb 19

11

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm SOT355-1

1998 Feb 19

12

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

NOTES

1998 Feb 19

13

Philips Semiconductors Product specification

74LVT6463.3V Octal bus transceiver/register (3-State)

Data sheet status

Data sheet
status

Objective
specification

Preliminary
specification

Product
specification

Product
status

Development

Qualification

Production

Definition

This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.

This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.

[1]

[1] Please consult the most recently issued datasheet before initiating or completing a design.

Definitions

Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one

or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.

Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.

Disclaimers

Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can

reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

 Copyright Philips Electronics North America Corporation 1998

All rights reserved. Printed in U.S.A.

print code Date of release: 05-96
Document order number: 9397-750-03544

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