STMICROELECTRONICS 74LVXC4245

74LVXC4245
OCTAL DUAL SUPPLY BUS TRANSCEIVER
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■
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HIGH SPEED:
tPD = 6.5ns (MAX.) at
VCCA = 5.0V, VCCB = 5.0V
LOW POWER DISSIPATION:
ICCA = ICCB = 5µA(MAX.) at TA=25°C
LOW NOISE: VOLP =0.3V (TYP.) at
VCCA=5.0V VCCB =3.3V
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCCA(OPR) = 4.5V to 5.5V (1.2V Data Retention)
VCCB(OPR) = 2.7V to 5.5V (1.2V Data Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES C4245
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74LVXC4245 is a dual supply 8 bit
configurable low voltage CMOS OCTAL BUS
TRANSCEIVER fabricated with sub-micron silicon
gate and double-layer metal wiring C2MOS
technology. Designed for use as an interface
between a 5V bus and a 3.3V to 5V bus in a mixed
5V/3.3V supply systems, it achieves high speed
operation while maintaining the CMOS low power
dissipation.
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
T&R
SOP
TSSOP
74LVXC4245M
74LVXC4245MTR
74LVXC4245TTR
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 to 5V 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
July 2001
1/11
74LVXC4245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
2
3, 4, 5, 6, 7,
8, 9, 10
21, 20, 19,
18, 17, 16,
15, 14
22
11, 12, 13
23
1
DIR
A1 to A8
Directional Control
Data Inputs/Outputs
B1 to B8
Data Inputs/Outputs
24
NAME AND FUNCTION
G
GND
NC
VCCA
Output Enable Input
Ground (0V)
Not Connected
Positive Supply Voltage
VCCB
Positive Supply Voltage
TRUTH TABLE
INPUTS
FUNCTION
OUTPUT
G
DIR
A BUS
B BUS
L
L
H
L
H
X
OUTPUT
INPUT
Z
INPUT
OUTPUT
Z
A=B
B=A
Z
X : Don’t Care
Z : High Impedance
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCCA
Supply Voltage
-0.5 to +7.0
V
VCCB
Supply Voltage
-0.5 to +7.0
V
VI
DC Input Voltage
-0.5 to VCCA + 0.5
V
VI/OA
DC I/O Voltage
V
VI/OB
DC I/O Voltage
-0.5 to VCCA + 0.5
-0.5 to VCCB + 0.5
V
IIK
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 50
mA
IOA
DC Output Current
± 50
mA
IOB
DC Output Current
± 50
mA
ICCA
DC VCC or Ground Current
± 200
mA
ICCB
DC VCC or Ground Current
± 100
mA
Pd
Power Dissipation
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
180
mW
-65 to +150
°C
300
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
2/11
74LVXC4245
RECOMMENDED OPERATING CONDITIONS
Symbol
Value
Unit
VCCA
Supply Voltage (note 1)
4.5 to 5.5
V
VCCB
Supply Voltage (note 1)
2.7 to 5.5
V
Input Voltage
0 to VCCA
0 to VCCA
V
VI
Parameter
VI/OA
I/O Voltage
VI/OB
I/O Voltage
Top
dt/dv
Operating Temperature
V
0 to VCCB
-40 to 85
°C
0 to 10
ns/V
Input Rise and Fall Time (note 2)
V
1) VIN from 30% to 70% of VCC
2) VCCA = 4.5 to 5.5V; VCCB = 2.7 to 3.6V;
DC SPECIFICATIONS FOR VCCA
Test Condition
Symbol
VIHA
VILA
VOHA
VOLA
IIA
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level
Output Voltage
Low Level Output
Voltage
Value
TA = 25 °C
VCCA VCCB
(V)
(V)
Min.
4.5
4.5
5.5
4.5
4.5
5.5
2.7
3.6
5.5
2.7
3.6
5.5
4.5
3.0
IO=-100 µA
4.4
4.5
3.0
IO=-24 mA
3.86
4.5
3.0
IO=100 µA
4.5
3.0
5.5
3.6
5.5
3.6
IOZA
Input Leakage
Current
High Impedance
Output Leakage
Current
ICCtA
Quiescent Supply
Current
5.5
ICCtAF
Quiescent VCCA
Supply Current
as B Port Floats
5.5
∆ICCtA
Maximum
Quiescent Supply
Current / Input
(An, DIR, G)
5.5
Typ.
-40 to 85 °C -55 to 125°C Unit
Max.
2.0
2.0
2.0
Min.
Max.
2.0
2.0
2.0
0.8
0.8
0.8
4.5
Max.
2.0
2.0
2.0
0.8
0.8
0.8
V
0.8
0.8
0.8
4.4
4.4
3.76
3.76
V
V
0.1
0.1
0.1
IO=24 mA
0.36
0.44
0.44
VI = VCC or GND
± 0.1
±1
±1
µA
VIA = VIHA or VILA
VIB = VIHB or VILB
VI/OA = VCCA or
GND
3.6
VIA = VCCA or
GND
VIB = VCCB or
GND
Open
VIA = VCCA or
GND G= DIR =
VCCA
VIB = Open
± 0.5
±5
±5
µA
5
50
50
µA
5
50
50
µA
1.35
1.5
1.5
mA
5.5
VIA = VCCA - 2.1V
VIB = VCCB or
GND
0
Min.
V
3/11
74LVXC4245
DC SPECIFICATIONS FOR VCCB
Test Condition
Symbol
VIHB
VILB
VOHB
VOLB
IIB
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level
Output Voltage
Low Level Output
Voltage
Min.
2.7
3.6
5.5
2.7
3.6
5.5
Typ.
-40 to 85 °C -55 to 125°C Unit
Max.
2.0
2.0
3.85
Min.
Max.
2.0
2.0
3.85
0.8
0.8
1.65
Min.
Max.
2.0
2.0
3.85
0.8
0.8
1.65
V
0.8
0.8
1.65
4.5
3.0
IO=-100 µA
2.9
3.0
2.9
2.9
4.5
3.0
IO=-12 mA
2.56
2.85
2.46
2.46
4.5
3.0
IO=-24 mA
2.35
2.65
2.25
2.25
4.5
2.7
IO=-12 mA
2.3
2.5
2.2
2.2
4.5
2.7
IO=-24 mA
2.1
2.3
2.0
2.0
4.5
4.5
IO=-24 mA
3.86
4.25
3.76
3.76
V
V
4.5
3.0
IO=100 µA
0.0
0.1
0.1
0.1
4.5
3.0
IO=24 mA
0.21
0.36
0.44
0.44
4.5
2.7
IO=12 mA
0.11
0.36
0.44
0.44
4.5
2.7
IO=24 mA
0.22
0.42
0.50
0.50
4.5
4.5
IO=24 mA
0.18
0.36
0.44
0.44
5.5
5.5
VI = VCCA or GND
± 0.1
±1
±1
µA
5.5
5.5
VIA = VIHA or VILA
VI/Ob = VCCb or
GND
VIA = VCCA or
GND
VIB = VCCB or
GND
VIA = VCCA or
GND
VIB = VCCB - 0.6V
± 0.5
±5
±5
µA
5
50
50
µA
0.35
0.5
0.5
mA
IOZB
Input Leakage
Current
High Impedance
Output Leakage
Current
ICCtB
Quiescent Supply
Current
5.5
5.5
∆ICCtB
Maximum
Quiescent Supply
Current / Input
5.5
3.6
4/11
TA = 25 °C
VCCA VCCB
(V)
(V)
4.5
4.5
4.5
4.5
4.5
4.5
Value
V
74LVXC4245
DINAMIC SWITCHING CHARACTERISTICS
Test Condition
Symbol
VOLPA
VOLPB
VIHDA
VILDA
VIHDB
VILDB
Parameter
Dynamic Low
Level Quiet
Output (note 1, 2)
Dynamic Low
Level Quiet
Output (note 1, 2)
Dynamic High
Voltage Input
(note 1, 3)
Dynamic Low
Voltage Input
(note 1, 3)
Dynamic High
Voltage Input
(note 1, 3)
Dynamic Low
Voltage Input
(note 1, 3)
VCCA VCCB
(V)
(V)
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
Value
TA = 25 °C
Min.
-1.2
Typ.
Max.
1.0
1.5
Max.
Min.
Max.
1.2
V
-0.5
2
0.8
V
V
2
0.8
Min.
V
-0.6
0.8
-0.8
-40 to 85 °C -55 to 125°C Unit
V
V
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 (VILD). 0V to threshold
(VIHD) f = 1MHz
5/11
74LVXC4245
AC ELECTRICAL CHARACTERISTICS (C L = 50pF, Input tr = tf = 3ns)
Value (3)
Test Condition
Symbol
Parameter
tPLH
Propagation Delay
Time (An to Bn)
2.7 to
3.6
Propagation Delay
Time (An to Bn)
5.0(*)
2.7 to
3.6
tPHL
tPZL
tPZH
tPLZ
tPHZ
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
tOSLH
tOSHL
VCCB
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
1.0
5.5
7.5
1.0
8.0
1.0
8.5
1.0
4.9
6.5
1.0
7.0
1.0
7.5
1.0
5.0
7.0
1.0
7.5
1.0
7.5
1.0
4.0
5.5
1.0
6.0
1.0
6.5
Output Enable
Time (G to Bn)
5.0(*)
2.7 to
3.6
1.0
6.7
9.0
1.0
10.0
1.0
10.5
1.0
5.6
7.5
1.0
8.0
1.0
8.5
Output Enable
Time (G to Bn)
5.0(*)
2.7 to
3.6
1.0
6.9
9.5
1.0
10.0
1.0
10.5
1.0
5.7
7.5
1.0
8.0
1.0
8.5
Output Disable
Time (G to Bn)
5.0(*)
2.7 to
3.6
1.0
6.0
9.0
1.0
9.5
1.0
9.5
1.0
4.8
7.0
1.0
7.5
1.0
7.5
Output Disable
Time (G to Bn)
5.0(*)
2.7 to
3.6
1.0
4.2
6.5
1.0
7.0
1.0
7.5
1.0
3.8
5.5
1.0
6.0
1.0
6.5
Propagation Delay
Time (Bn to An)
5.0(*)
2.7 to
3.6
1.0
5.6
7.5
1.0
8.0
1.0
8.5
1.0
4.7
6.5
1.0
7.0
1.0
7.5
Propagation Delay
Time (Bn to An)
5.0(*)
2.7 to
3.6
1.0
4.3
6.0
1.0
6.5
1.0
7.0
1.0
3.9
5.0
1.0
5.5
1.0
5.5
Output Enable
Time (G to An)
5.0(*)
2.7 to
3.6
1.0
8.0
10.0
1.0
11.0
1.0
11.5
1.0
7.4
9.0
1.0
10.0
1.0
10.5
Output Enable
Time (G to An)
5.0(*)
2.7 to
3.6
1.0
6.3
8.0
1.0
8.5
1.0
8.5
1.0
6.1
7.5
1.0
8.5
1.0
8.5
Output Disable
Time (G to An)
5.0(*)
2.7 to
3.6
1.0
3.4
5.5
1.0
6.0
1.0
6.5
1.0
3.4
5.5
1.0
6.0
1.0
6.5
Output Disable
Time (G to An)
5.0(*)
2.7 to
3.6
1.0
2.9
5.0
1.0
5.5
1.0
6.0
5.0(*)
2.7 to
3.6
1.0
1.0
5.0
1.0
Output To Output
Skew Time (note1,
2)
5.0(*)
2.9
4.5
0.5
1.0
1.5
1.5
0.5
1.0
1.5
1.5
Unit
ns
ns
ns
ns
ns
ns
5.5
ns
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 HIGH or LOW (tOSLH = | tPLHm - t PLHn|, tOSHL = | tPHLm - tPHLn|
2) Parameter guaranteed by design
3) Typical values referred at VCCA = 5.0V, VCCB = 5.0V or VCCA = 5.0V, VCCB = 3.3V
(*) Voltage Range is 5.0V ± 0.5
6/11
74LVXC4245
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
CINA
CI/O
CPD
CPD
Parameter
Input
Capacitance
Input/Output
Capacitance
Dynamic Low
Level Quiet
Output (note 1)
A to B
Dynamic Low
Level Quiet
Output (note 1)
B to A
VCCA VCCB
(V)
(V)
open open
Value
TA = 25 °C
Min.
-40 to 85 °C -55 to 125°C Unit
Typ.
Max.
4.5
10
Min.
Max.
Min.
10
Max.
10
V
5.0
3.3
10
V
5.0
3.3
55
V
5.0
3.3
40
V
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)
TEST CIRCUIT
TEST
SWITCH
tPLH, tPHL
Open
tPZLH, tPLZ
2VCC
tPZH, tPHZ
Open
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
7/11
74LVXC4245
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
8/11
74LVXC4245
SO-24 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
MAX.
2.65
a1
0.1
0.104
0.2
a2
0.004
0.008
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
S
8° (max.)
L
s
e3
b1
e
a1
b
A
a2
C
c1
E
D
13
1
12
F
24
PO13T
9/11
74LVXC4245
TSSOP24 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
MAX.
1.1
A1
0.05
0.15
A2
0.043
0.002
0.006
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
K
0°
8°
0°
8°
L
0.50
0.70
0.020
0.028
A
A2
A1
b
K
e
L
E
c
D
E1
PIN 1 IDENTIFICATION
1
7047476A
10/11
74LVCXC4245
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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11/11