1/10
July 2001
s
HIGH SPEED :
t
PD
= 8ns (MAX.) at T
A
=25C
V
CCA
= 3.3V V
CCB
= 5.0V
s
LOW POWER DISSIPATION:
I
CCA
= I
CCB
= 5
A(MAX.) at T
A
=25C
s
LOW NOISE: V
OLP
=0.3V (TYP.) at V
CC
=3.3V
s
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN)
s
BALANCED PROPAGATION DELAYS:
t
PLH
t
PHL
s
OPERATING VOLTAGE RANGE:
V
CCA
(OPR) = 2.7V to 3.6V (1.2V Data Retention)
V
CCB
(OPR) = 4.5V to 5.5V (1.2V Data Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 3245
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74LVX3245 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.
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 3V bus, the B-port
with the 5V bus.
All inputs are equipped with protection circuits
against static discharge, giving them 2KV ESD
immunity and transient excess voltage.
74LVX3245
OCTAL DUAL SUPPLY BUS TRANSCEIVER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
TUBE
T & R
SOP
74LVX3245M
74LVX3245MTR
TSSOP
74LVX3245TTR
TSSOP
SOP
74LVX3245
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don't Care
Z : High Impedance
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
PIN No
SYMBOL
NAME QND FUNCTION
2
DIR
Directional Control
3, 4, 5, 6, 7,
8, 9, 10
A1 to A8
Data Inputs/Outputs
21, 20, 19,
18, 17, 16,
15, 14
B1 to B8
Data Inputs/Outputs
22
G
Output Enable Input
11, 12, 13
GND
Ground (0V)
23
NC
Not Connected
1
V
CCA
Positive Supply Voltage
24
V
CCB
Positive Supply Voltage
INPUTS
FUNCTION
OUTPUT
G
DIR
A BUS
B BUS
L
L
OUTPUT
INPUT
A = B
L
H
INPUT
OUTPUT
B = A
H
X
Z
Z
Z
Symbol
Parameter
Value
Unit
V
CCA
Supply Voltage
-0.5 to +7.0
V
V
CCB
Supply Voltage
-0.5 to +7.0
V
V
I
DC Input Voltage
-0.5 to V
CCA
+ 0.5
V
V
I/OA
DC I/O Voltage
-0.5 to V
CCA
+ 0.5
V
V
I/OB
DC I/O Voltage
-0.5 to V
CCB
+ 0.5
V
I
IK
DC Input Diode Current
20
mA
I
OK
DC Output Diode Current
50
mA
I
OA
DC Output Current
50
mA
I
OB
DC Output Current
50
mA
I
CCA
DC V
CC
or Ground Current
200
mA
I
CCB
DC V
CC
or Ground Current
100
mA
P
d
Power Dissipation
180
mW
T
stg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature (10 sec)
300
C
74LVX3245
3/10
RECOMMENDED OPERATING CONDITIONS
1) V
IN
from 30% to 70% of V
CC
2) V
CCA
= 2.7 to 3.6V; V
CCB
= 4.5 to 5.5V;
DC SPECIFICATIONS FOR V
CCA
Symbol
Parameter
Value
Unit
V
CCA
Supply Voltage (note 1)
2.7 to 3.6
V
V
CCB
Supply Voltage (note 1)
4.5 to 5.5
V
V
I
Input Voltage
0 to V
CCA
V
V
I/OA
I/O Voltage
0 to V
CCA
V
V
I/OB
I/O Voltage
0 to V
CCB
V
T
op
Operating Temperature
-55 to 125
C
dt/dv
Input Rise and Fall Time (note 2)
0 to 10
ns/V
Symbol
Parameter
Test Condition
Value
Unit
V
CCA
(V)
V
CCB
(V)
T
A
= 25 C
-40 to 85 C -55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
V
IHA
High Level Input
Voltage
3.6
5.0
2.0
2.0
2.0
V
2.7
5.0
2.0
2.0
2.0
V
ILA
Low Level Input
Voltage
3.6
5.0
0.8
0.8
0.8
V
2.7
5.0
0.8
0.8
0.8
V
OHA
High Level
Output Voltage
3.0
4.5
I
O
=-100
A
2.9
2.99
2.9
2.9
V
3.0
4.5
I
O
=-24 mA
2.35
2.65
2.25
2.25
2.7
4.5
I
O
=-12 mA
2.3
2.5
2.2
2.2
2.7
4.5
I
O
=-24 mA
2.1
2.3
2.0
2.0
V
OLA
Low Level Output
Voltage
3.0
4.5
I
O
=100
A
0.002
0.1
0.1
0.1
V
3.0
4.5
I
O
=24 mA
0.21
0.36
0.44
0.44
2.7
4.5
I
O
=12 mA
0.11
0.36
0.44
0.44
2.7
4.5
I
O
=24 mA
0.22
0.42
0.5
0.5
I
IA
Input Leakage
Current
3.6
5.5
V
I
= V
CC
or GND
0.1
1
1
A
I
OZA
High Impedance
Output Leakage
Current
3.6
5.5
V
IA
= V
IHA
or V
ILA
V
IB
= V
IHB
or V
ILB
V
I/OA
= V
CCA
or
GND
0.5
5
5
A
I
CCtA
Quiescent Supply
Current
3.6
5.5
V
IA
= V
CCA
or
GND
V
IB
= V
CCB
or
GND
5
50
50
A
I
CCtA
Maximum
Quiescent Supply
Current / Input
(An, DIR, G)
3.6
5.5
V
IA
= V
CCA
- 0.6V
V
IB
= V
CCB
or
GND
0.35
0.5
0.5
mA
74LVX3245
4/10
DC SPECIFICATIONS FOR V
CCB
DINAMIC SWITCHING CHARACTERISTICS
1) Worst case package
2) Max number of output defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3V to threshold (V
ILD
). 0V to threshold
(V
IHD
) f = 1MHz
Symbol
Parameter
Test Condition
Value
Unit
V
CCA
(V)
V
CCB
(V)
T
A
= 25 C
-40 to 85 C -55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
V
IHB
High Level Input
Voltage
3.3
4.5
2.0
2.0
2.0
V
3.3
5.5
2.0
2.0
2.0
V
ILB
Low Level Input
Voltage
3.3
4.5
0.8
0.8
0.8
V
3.3
5.5
0.8
0.8
0.8
V
OHB
High Level
Output Voltage
3.0
4.5
I
O
=-100
A
4.4
4.5
4.4
4.4
V
3.3
4.5
I
O
=-24 mA
3.86
4.25
3.75
3.75
V
OLB
Low Level Output
Voltage
3.0
4.5
I
O
=100
A
0.002
0.1
0.1
0.1
V
3.3
4.5
I
O
=24 mA
0.18
0.36
0.44
0.44
I
IB
Input Leakage
Current
3.6
5.5
V
I
= V
CCA
or GND
0.1
1
1
A
I
OZB
High Impedance
Output Leakage
Current
3.6
5.5
V
IA
= V
IHA
or V
ILA
V
I/Ob
= V
CCb
or
GND
0.5
5
5
A
I
CCtB
Quiescent Supply
Current
3.6
5.5
V
IA
= V
CCA
or
GND
V
IB
= V
CCB
or
GND
8
80
80
A
I
CCtB
Maximum
Quiescent Supply
Current / Input
3.6
5.5
V
IA
= V
CCA
or
GND
V
IB
= V
CCB
- 2.1V
1.35
1.5
1.5
mA
Symbol
Parameter
Test Condition
Value
Unit
V
CCA
(V)
V
CCB
(V)
T
A
= 25 C
-40 to 85 C -55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
V
OLPA
Dynamic Low
Level Quiet
Output (note 1, 2)
3.3
5.0
1.0
1.5
V
3.3
5.0
-1.2
-0.6
V
OLPB
Dynamic Low
Level Quiet
Output (note 1, 2)
3.3
5.0
0.8
1.2
V
3.3
5.0
-0.8
-0.5
V
IHDA
Dynamic High
Voltage Input
(note 1, 3)
3.3
5.0
2
V
V
ILDA
Dynamic Low
Voltage Input
(note 1, 3)
3.3
5.0
0.8
V
V
IHDB
Dynamic High
Voltage Input
(note 1, 3)
3.3
5.0
2
V
V
ILDB
Dynamic Low
Voltage Input
(note 1, 3)
3.3
5.0
0.8
V
74LVX3245
5/10
AC ELECTRICAL CHARACTERISTICS (C
L
= 50pF, Input t
r
= t
f
= 3ns)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW
2) Parameter guaranteed by design
3) Typical values at V
CCA
= 3.3V, V
CCB
= 5.0V
(*) Voltage range is 3.0V
0.3V
Symbol
Parameter
Test Condition
Value
(3)
Unit
V
CCA
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
t
PLH
Propagation Delay
Time (An to Bn)
2.7
1.0
9.0
1.0
10.0
ns
3.0
(*)
1.0
5.4
8.0
1.0
8.5
1.0
9.5
t
PHL
Propagation Delay
Time (An to Bn)
2.7
1.0
8.5
1.0
9.5
3.0
(*)
1.0
5.6
7.5
1.0
8.0
1.0
9.5
t
PZL
Output Enable
Time (G to Bn)
2.7
1.0
9.0
1.0
10.0
ns
3.0
(*)
1.0
4.8
8.0
1.0
8.5
1.0
9.5
t
PZH
Output Enable
Time (G to Bn)
2.7
1.0
9.5
1.0
10.5
3.0
(*)
1.0
6.3
8.5
1.0
9.0
1.0
10.0
t
PLZ
Output Disable
Time (G to Bn)
2.7
1.0
8.5
1.0
9.5
ns
3.0
(*)
1.0
5.3
7.5
1.0
8.5
1.0
9.5
t
PHZ
Output Disable
Time (G to Bn)
2.7
1.0
8.0
1.0
9.0
3.0
(*)
1.0
4.2
7.0
1.0
7.5
1.0
8.5
t
PLH
Propagation Delay
Time (Bn to An)
2.7
1.0
8.5
1.0
9.5
ns
3.0
(*)
1.0
5.1
7.5
1.0
8.0
1.0
8.5
t
PHL
Propagation Delay
Time (Bn to An)
2.7
1.0
8.5
1.0
9.0
3.0
(*)
1.0
5.7
7.5
1.0
8.0
1.0
8.5
t
PZL
Output Enable
Time (G to An)
2.7
1.0
9.5
1.0
10.0
ns
3.0
(*)
1.0
6.3
8.5
1.0
9.0
1.0
9.5
t
PZH
Output Enable
Time (G to An)
2.7
1.0
10.0
1.0
10.5
3.0
(*)
1.0
6.8
9.0
1.0
9.5
1.0
10.0
t
PLZ
Output Disable
Time (G to An)
2.7
1.0
9.0
1.0
9.5
ns
3.0
(*)
1.0
5.3
8.0
1.0
8.5
1.0
9.0
t
PHZ
Output Disable
Time (G to An)
2.7
1.0
7.5
1.0
8.0
3.0
(*)
1.0
3.7
6.5
1.0
7.0
1.0
8.0
t
OSLH
t
OSHL
Output To Output
Skew Time (note1,
2)
2.7
0.5
1.0
1.5
1.5
ns
3.0
(*)
0.5
1.0
1.5
1.5
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