Datasheet 74LVX4245M, 74LVX4245TTR, 74LVX4245MTR Datasheet (SGS Thomson Microelectronics)

74LVX424 5

OCTAL DUAL SUPPLY BUS TRANSCEIVER

■ HIGH SPEED:

t

= 8.5 ns (MAX.) at

PD

V

=5.0V V

CCA

■ LOW POWER DISSIPATION:

I

= I

CCA

■ LOW NOISE: V

V

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

■ BALANCED PROPAGATION DELAYS:

t

PLH

■ OPERATING VOLTAGE R ANGE:

V
V

CCB

=5.5V V

CCA

| = IOL = 24mA (MIN)

OH

≅ t

PHL

(OPR) = 4.5V to 5.5V (1.2V Data Retention)

CCA

(OPR) = 2.7V to 3.6V (1.2V Data Retention)

CCB

= 3.3V

CCB

=5µA(MAX.) at TA=25°C

=0.3V (TYP.) at

OLP

=3.3V

CCB

PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 4245

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74LVX4245 is a dual supply low voltage
CMOS OCTAL BUS TRANSCEIVER fabricated
with sub-micron silicon gate and double-layer
metal wiring C

2

MOS technology. Designed for use
as an interface between a 5V bus and a 3.3V bus
in a mixed 5V/3.3V supply systems, it achieves
high speed operation while maintaining the CMOS
low power dissipation.

TSSOPSOP

ORDER CODES

PACKAGE TUBE T & R

SOP 74LVX4245M 74LVX4245MTR

TSSOP 74LVX4245TTR

This IC is intended for two-way asynchronous
communication between data buses and the
direction of data transmission is determined by
DIR input. The enable input G

can be used to
disable the device so that the buses are effectively
isolated.
The A-port interfaces with the 5V bus, the B-port
with the 3.3V bus.
All inputs are equipped with protection circuits
against static discharge, giving them 2KV ESD
immunity and transient excess voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/11July 2001

74LVX4245

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME QND FUNCTION

2 DIR Directional Control

3, 4, 5, 6, 7,

8, 9, 10

21, 20, 19,
18, 17, 16,

15, 14

22 G

11, 12, 13 GND Ground (0V)

23 NC Not Connected

1V

24 V

TRUTH TABLE

A1 to A8 Data Inputs/Outputs

B1 to B8 Data Inputs/Outputs

CCA
CCB

Output Enable Input

Positive Supply Voltage
Positive Supply Voltage

INPUTS FUNCTION

OUTPUT

G

DIR A BUS B BUS

L L OUTPUT INPUT A = B
L H INPUT OUTPUT B = A

HXZZZ

X : Don’t Care
Z : High Impedance

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CCA

V

CCB

V

V

I/OA

V

I/OB

I

I

OK

I

OA

I

OB

I

CCA

I

CCB

P

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied

Supply Voltage
Supply Voltage
DC Input Voltage -0.5 to V

I

DC I/O Voltage -0.5 to V
DC I/O Voltage -0.5 to V
DC Input Diode Current

IK

DC Output Diode Current
DC Output Current
DC Output Current
DC VCC or Ground Current
DC VCC or Ground Current
Power Dissipation

d

Storage Temperature

stg

Lead Temperature (10 sec)

L

-0.5 to +7.0 V

-0.5 to +7.0 V
+ 0.5

CCA

+ 0.5

CCA

+ 0.5

CCB

± 20 mA
± 50 mA
± 50 mA

± 50 mA
± 200 mA
± 100 mA

180 mW

-65 to +150 °C

300 °C

V
V
V

2/11

74LVX4245

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

CCA

V

CCB

V

V

I/OA

V

I/OB

T

dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V

1) VIN from 30 % to 70% of V

2) V

CCA

Supply Voltage (note 1)
Supply Voltage (note 1)
Input Voltage 0 to V

I

I/O Voltage 0 to V
I/O Voltage 0 to V
Operating Temperature

op

= 4.5 to 5.5V; V

CC

= 2.7 to 3.6V;

CCB

4.5 to 5.5 V

2.7 to 3.6 V

CCA
CCA
CCB

-55 to 125 °C

V
V
V

DC SPECIFICATIONS FOR V

Symbol Parameter

V

V

V

I

High Level Input

IHA

Voltage

V

Low Level Input

ILA

Voltage
High Level

OHA

Output Voltage
Low Level Output

OLA

Voltage

I

Input Leakage

IA

Current
High Impedance

OZA

Output Leakage
Current

I

∆I

Quiescent Supply

CCtA

Current

Maximum

CCtA

Quiescent Supply
Current / Input
(An, DIR, G

V

CCA

(V)

4.5 3.3 2.0 2.0 2.0

5.5 3.3 2.0 2.0 2.0

4.5 3.3 0.8 0.8 0.8

5.5 3.3 0.8 0.8 0.8

4.5 3.0

4.5 3.0

4.5 3.0

4.5 3.0

5.5 3.6

5.5 3.6 VIA = V

5.5 3.6 VIA = V

5.5 3.6 V

)

CCA

Test Condition Value

T

= 25 °C

V

CCB

(V)

IO=-100 µA

=-24 mA

I

O

IO=100 µA

I

=24 mA

O

= VCC or GND

V

I

or V

IHA

VIB = V

V

I/OA

IHB

= V

or V

CCA

ILA
ILB

or

A

Min. Typ. Max. Min. Max. Min. Max.

4.4 4.5 4.4 4.4

3.86 3.76 3.76
0 0.1 0.1 0.1

0.36 0.44 0.44

± 0.1 ± 1 ± 1 µA
± 0.5 ± 5 ± 5 µA

GND

CCA

or

55050µA

GND

V

IB

= V

CCB

or

GND

IA

V

= V

IB

= V

CCA

- 2.1V

CCB

or

1.35 1.5 1.5 mA

GND

-40 to 85 °C -55 to 125°C

Unit

V

V

V

V

3/11

74LVX4245

DC SPECIFICATIONS FOR V

Symbol Parameter

V

V

V

I

High Level Input

IHB

Voltage

V

Low Level Input

ILB

Voltage
High Level

OHB

Output Voltage

Low Level Output

OLB

Voltage

I

Input Leakage

IB

Current
High Impedance

OZB

Output Leakage
Current

I

∆I

Quiescent Supply

CCtB

Current

Maximum

CCtB

Quiescent Supply
Current / Input

V

CCA

(V)

5.0 3.6 2.0 2.0 2.0

5.0 2.7 2.0 2.0 2.0

5.0 3.6 0.8 0.8 0.8

5.0 2.7 0.8 0.8 0.8

4.5 3.0

4.5 2.7

4.5 3.0

4.5 2.7

5.5 3.6

5.5 3.6 VIA = V

5.5 3.6 VIA = V

5.5 3.6 VIA = V

CCB

Test Condition Value

T

= 25 °C

V

CCB

(V)

IO=-100 µA

I

=-12 mA

O

I

O

=100 µA

I

O

I

O

I

O

= V

V

I

V

I/Ob

=-8 mA

=12 mA

=8 mA

or GND

CCA

or V

IHA

= V

CCb

ILA

or

A

Min. Typ. Max. Min. Max. Min. Max.

2.9 3.0 2.9 2.9

2.48 2.4 2.4

2.26 2.2 2.2

0.0 0.1 0.1 0.1

0.31 0.40 0.40

0.31 0.40 0.40

± 0.1 ± 1 ± 1 µA
± 0.5 ± 5 ± 5 µA

GND

CCA

or

5505µA

GND

V

IB

= V

CCB

or

GND

CCA

or

0.35 0.5 0.35 mA

GND

V

IB

= V

CCB

- 0.6V

-40 to 85 °C -55 to 125°C

Unit

V

V

V4.5 3.0

V4.5 3.0

4/11

DINAMIC SWITCHING CHARACTERISTICS

Test Condition Value

T

Symbol Parameter

V

OLPA

Dynamic Low
Level Quiet
Output (note 1, 2)

V

OLPB

Dynamic Low
Level Quiet
Output (note 1, 2)

V

IHDA

Dynamic High
Voltage Input

V

V

CCA

CCB

(V)

(V)

5.0 3.3 1.0 1.5

5.0 3.3 -1.2 -0.6

5.0 3.3 0.8 1.2

5.0 3.3 -0.8 -0.5

5.0 3.3 2 V

= 25 °C

A

Min. Typ. Max. Min. Max. Min. Max.

(note 1, 3)

ILDA

Dynamic Low
Voltage Input

5.0 3.3 0.8 V

V

(note 1, 3)

V

IHDB

Dynamic High
Voltage Input

5.0 3.3 2 V

(note 1, 3)

ILDB

Dynamic Low
Voltage Input

5.0 3.3 0.8 V

V

(note 1, 3)

1) Worst c ase package

2) Max number of output defined as (n). Data inputs are driven 0V to 3. 3V, (n-1) outp uts switching and one output at GND

3) Max number of data in put s (n) switchi ng. (n-1) swi tc hi ng 0V to 3.3V . I nputs under tes t switching : 3V t o threshold (V
(V

) f = 1MHz

IHD

-40 to 85 °C -55 to 125°C

ILD

74LVX4245

Unit

V

V

). 0V to threshold

5/11

74LVX4245

AC ELECTRICAL CHARACTERISTICS (CL = 50pF, Input tr = tf = 3ns)

Test Condition

Symbol Parameter

V

CCB

(V)

t

t

t

t

t

t

t

t

t

t

t

t

t

OSLH

t

OSHL

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch­ing in the same direction, either HIG H or LOW (t

2) Param eter guaranteed by design

3) Typical values at V
(*) Vol tage range is 3. 0V ±

PLH

PHL

PZL

PZH

PLZ

PHZ

PLH

PHL

PZL

PZH

PLZ

PHZ

Propagation Delay
Time (An to Bn)

Propagation Delay
Time (An to Bn)

Output Enable
Time (G

to Bn)

Output Enable
Time (G

to Bn)

Output Disable
Time (G

to Bn)

Output Disable
Time (G

to Bn)

Propagation Delay
Time (Bn to An)

Propagation Delay
Time (Bn to An)

Output Enable
Time (G

to An)

Output Enable
Time (G

to An)

Output Disable
Time (G

to An)

Output Disable
Time (G

Output To Output

to An)

Skew Time (note1,

2)

CCA

= 5.0V, V

0.3V

2.7 1.0 10.0 1.0 11.0

(*)

3.0

2.7

(*)

3.0

2.7 1.0 11.5 1.0 12.5

(*)

3.0

2.7 1.0 11.5 1.0 11.5

(*)

3.0

2.7 1.0 10.0 1.0 11.0

(*)

3.0

2.7 1.0 7.5 1.0 8.5

(*)

3.0

2.7 1.0 10.0 1.0 11.0

(*)

3.0

2.7 1.0 10.0 1.0 11.0

(*)

3.0

2.7 1.0 10.0 1.0 11.0

(*)

3.0

2.7 1.0 10.0 1.0 11.0

(*)

3.0

2.7 1.0 7.5 1.0 8.5

(*)

3.0

2.7 1.0 7.5 1.0 8.5

(*)

3.0

2.7 0.5 1.0 1.5 1.5

(**)

3.3

CCB

= 3.3V

OSLH

= | t

PLHm

- t

PLHn

T

= 25°C

A

Min. Typ. Max. Min. Max. Min. Max.

1.0 5.1 8.5 1.0 9.0 1.0 10.0

1.0 5.3 8.5 1.0 9.0 1.0 10.0

1.0 6.5 10.0 1.0 10.5 1.0 11.5

1.0 6.7 10.0 1.0 10.5 1.0 11.5

1.0 6.0 9.5 1.0 10.0 1.0 11.0

1.0 3.3 6.5 1.0 7.0 1.0 8.0

1.0 5.4 8.5 1.0 9.0 1.0 10.0

1.0 5.5 8.5 1.0 9.0 1.0 10.0

1.0 5.2 9.0 1.0 9.5 1.0 10.5

1.0 5.8 9.0 1.0 9.5 1.0 10.5

1.0 3.9 7.0 1.0 7.5 1.0 8.5

1.0 2.9 6.5 1.0 7.0 1.0 8.0

0.5 1.0 1.5 1.5

|, t

OSHL

= | t

PHLm

- t

PHLn

|

(3)

Value

-40 to 85°C -55 to 125°C

1.0 10.0 1.0 11.0

Unit

ns

ns

ns

ns

ns

ns

ns

6/11

74LVX4245

CAPACITIVE CHARACTERISTICS

Test Condition Value

T

Symbol Parameter

C

INA

C

I/O

C

PD

Input
Capacitance

Input/Output
Capacitance

Dynamic Low
Level Quiet

V

V

CCA

CCB

(V)

(V)

open open 4.5 10 10 10 V

3.3 5.0 10 V

3.3 5.0 55 V

= 25 °C

A

Min. Typ. Max. Min. Max. Min. Max.

Output (note 1)
A to B

C

Dynamic Low

PD

Level Quiet

3.3 5.0 40 V

Output (note 1)
B to A

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (R efer to Test Circuit). Aver age current can be obtained by the follo wi ng equation. I

CC(opr)

TEST CIRCUIT

-40 to 85 °C -55 to 125°C

= CPD x VCC x fIN + ICC/8 (per circuit)

Unit

TEST SWITCH

t

, t

PLH

PHL

, t

t

PZLH

PLZ

t

, t

PZH

PHZ

CL = 50pF or equivalent (includes jig and probe capacitance)
R

= R1 = 500Ω or equivalent

L

= Z

R

of pulse generator (typically 50Ω)

T

OUT

Open

2V

CC

Open

7/11

74LVX4245

WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)

WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)

8/11

SO-24 MECHANICAL DATA

74LVX4245

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 2.65 0.104
a1 0.1 0.2 0.004 0.008
a2 2.45 0.096

b 0.35 0.49 0.014 0.019
b1 0.23 0.32 0.009 0.012

C 0.5 0.020

c1 45° (typ.)

D 15.20 15.60 0.598 0.614

E 10.00 10.65 0.393 0.419

e 1.27 0.050
e3 13.97 0.550

F 7.40 7.60 0.291 0.300

L 0.50 1.27 0.020 0.050

S8° (max.)

mm. inch

L

C

A

a2

b

e3

e

s

E

D

24 13

F

112

a1

c1

b1

PO13T

9/11

74LVX4245

TSSOP24 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 1.1 0.043

A1 0.05 0.15 0.002 0.006

A2 0.9 0.035

b 0.19 0.30 0.0075 0.0118

c 0.09 0.20 0.0035 0.0079

D 7.7 7.9 0.303 0.311

E 6.25 6.5 0.246 0.256

E1 4.3 4.5 0.169 0.177

e 0.65 BSC 0.0256 BSC

K0° 8°0° 8°

L 0.50 0.70 0.020 0.028

A2

A

A1

b

e

D

K

c

E1

L

E

PIN 1 IDENTIFICATION

10/11

1

7047476A

74LVX4245

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11/11