74LVXC3245M [ETC]
BUS TRANSCEIVER|SINGLE|8-BIT|LVX-CMOS|SOP|24PIN|PLASTIC ; 总线收发器|单| 8位| LVX -CMOS |专科| 24PIN |塑料\n
| 型号： | 74LVXC3245M |
| 厂家： | 
ETC |
| 描述： | BUS TRANSCEIVER|SINGLE|8-BIT|LVX-CMOS|SOP|24PIN|PLASTIC
|
| 文件： | 总12页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74LVXC3245
OCTAL DUAL SUPPLY BUS TRANSCEIVER
■
HIGH SPEED :
t
V
= 8ns (MAX.) at T =25°C
PD
A
= 3.3V, V
= 5.0V
CCA
CCB
■
■
■
■
■
LOW POWER DISSIPATION:
= I = 5µA(MAX.) at T =25°C
I
CCA
CCB
A
LOW NOISE: V
=0.3V (TYP.) at
OLP
V
=3.3V
SOP
TSSOP
CCA
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 24mA (MIN)
OH
OL
BALANCED PROPAGATION DELAYS:
ORDER CODES
PACKAGE
t
t
PLH
PHL
TUBE
74LVXC3245M
T & R
OPERATING VOLTAGE RANGE:
SOP
74LVXC3245MTR
74LVXC3245TTR
V
V
(OPR) =2.7Vto3.6V (1.2VDataRetention)
(OPR) =2.7Vto5.5V (1.2VDataRetention)
CCA
CCB
TSSOP
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES C3245
IMPROVED LATCH-UP IMMUNITY
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.
■
DESCRIPTION
The 74LVXC3245 is
a dual supply 8 bit
configurable low voltage CMOS OCTAL BUS
TRANSCEIVER fabricated with sub-micron silicon
The A-port interfaces with the 3V bus, the B-port
with the 5V bus.
2
gate and double-layer metal wiring C MOS
technology. Designed for use as an interface
between a 3.3V bus and a 3.3V to 5V bus in a
mixed 3.3V/5V supply systems, it achieves high
speed operation while maintaining the CMOS low
power dissipation.
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
1/12
74LVXC3245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCTION
2
DIR
Directional Control
Data Inputs/Outputs
3, 4, 5, 6, 7,
8, 9, 10
A1 to A8
21, 20, 19,
18, 17, 16,
15, 14
B1 to B8
Data Inputs/Outputs
22
G
Output Enable Input
Ground (0V)
11, 12, 13
GND
NC
23
1
Not Connected
V
V
Positive Supply Voltage
CCA
CCB
24
Positive Supply Voltage
TRUTH TABLE
INPUTS
FUNCTION
OUTPUT
G
DIR
A BUS
B BUS
L
L
L
H
X
OUTPUT
INPUT
Z
INPUT
OUTPUT
Z
A = B
B = A
Z
H
X : Don’t Care
Z : High Impedance
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
V
Supply Voltage
-0.5 to +7.0
-0.5 to +7.0
V
V
CCA
CCB
Supply Voltage
V
DC Input Voltage
DC I/O Voltage
-0.5 to V
+ 0.5
V
I
CCA
CCA
CCB
V
V
-0.5 to V
-0.5 to V
+ 0.5
+ 0.5
V
I/OA
I/OB
DC I/O Voltage
V
I
DC Input Diode Current
DC Output Diode Current
DC Output Current
DC Output Current
± 20
mA
mA
mA
mA
mA
mA
mW
°C
°C
IK
I
± 50
± 50
± 50
± 200
± 100
180
OK
I
OA
I
OB
I
DC V
DC V
or Ground Current
or Ground Current
CCA
CC
CC
I
CCB
P
Power Dissipation
d
T
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
stg
T
L
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
2/12
74LVXC3245
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
Supply Voltage (note 1)
Supply Voltage (note 1)
Input Voltage
2.7 to 3.6
2.7 to 5.5
V
V
CCA
V
CCB
V
0 to V
V
I
CCA
V
I/O Voltage
0 to V
V
I/OA
CCA
V
I/O Voltage
0 to V
V
I/OB
CCB
T
Operating Temperature
-55 to 125
0 to 10
°C
ns/V
op
dt/dv
Input Rise and Fall Time (note 2)
1) V from 30% to 70% of V
IN
CC
2) V
= 2.7 to 3.6V; V
= 2.7 to 5.5V;
CCA
CCB
3/12
74LVXC3245
DC SPECIFICATIONS FOR V
CCA
Test Condition
Value
T
= 25 °C
Symbol
Parameter
-40 to 85 °C -55 to 125°C Unit
A
V
V
CCB
CCA
(V)
(V)
Min. Typ. Max. Min. Max. Min. Max.
V
High Level Input
Voltage
2.7
3.0
3.6
2.7
3.0
3.6
3.0
3.0
3.6
5.5
3.0
3.6
5.5
3.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
IHA
V
V
V
Low Level Input
Voltage
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
ILA
V
High Level
Output Voltage
I =-100 µA
2.9
2.99
2.9
2.46
2.25
2.2
2.9
2.46
2.25
2.2
OHA
O
I =-12 mA
3.0
3.0
2.7
2.7
3.0
3.0
2.7
2.7
3.0
3.0
3.0
4.5
3.0
3.0
3.0
4.5
2.56 2.85
2.35 2.65
O
I =-24 mA
V
V
O
I =-12 mA
2.3
2.1
2.5
2.3
0.0
O
I =-24 mA
2.0
2.0
O
V
Low Level Output
Voltage
I =100 µA
0.1
0.1
0.44
0.44
0.5
0.1
0.44
0.44
0.5
OLA
O
I =24 mA
0.21 0.36
0.11 0.36
0.22 0.42
O
I =12 mA
O
I =24 mA
O
I
Input Leakage
Current
IA
V = V or GND
3.6
3.6
5.5
5.5
± 0.1
± 0.5
± 1
± 5
± 1
± 5
µA
µA
I
CC
I
High Impedance
Output Leakage
Current
V
V
= V
or V
or V
OZA
IA
IB
IHA
ILA
ILB
= V
IHB
V
= V
or
I/OA
CCA
GND
= V
I
Quiescent Supply 3.6
Current
5.5
V
V
or
5
5
50
50
50
50
µA
µA
CCtA
IA
IB
CCA
GND
= V
or
CCB
GND
= V
I
Quiescent V
3.6 Open
V
or
CCtAF
CCA
IA
CCA
Supply Current
as B Port Floats
GND G= DIR =
V
CCA
V
= Open
IB
∆I
Maximum
3.6
5.5
V
= V - 0.6V
CCA
0.35
0.5
0.5
mA
CCtA
IA
Quiescent Supply
Current / Input
(An, DIR, G)
V
= V
GND
or
CCB
IB
4/12
74LVXC3245
DC SPECIFICATIONS FOR V
CCB
Test Condition
Value
-40 to 85 °C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
T
= 25 °C
Symbol
Parameter
A
V
V
CCB
(V)
CCA
(V)
V
High Level Input
Voltage
2.7
3.0
3.6
2.7
3.0
3.6
3.0
3.0
3.6
5.5
3.0
3.6
5.5
3.0
2.0
2.0
2.0
2.0
2.0
2.0
IHB
V
V
3.85
3.85
3.85
V
Low Level Input
Voltage
0.8
0.8
0.8
0.8
0.8
0.8
ILB
1.65
1.65
1.65
V
High Level
Output Voltage
I =-100 µA
2.9
3.0
2.9
2.9
OHB
O
I =-12 mA
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
4.5
3.0
3.0
4.5
2.56 2.85
2.35 2.65
3.86 4.25
0.00
2.46
2.25
3.76
2.46
2.25
3.76
O
V
V
I =-24 mA
O
I =-24 mA
O
V
Low Level Output
Voltage
I =100 µA
0.1
0.1
0.1
OLB
O
I =24 mA
0.21 0.36
0.18 0.36
0.44
0.44
0.44
0.44
O
I =24 mA
O
I
Input Leakage
Current
IB
V = V
or GND
CCA
3.6
3.6
5.5
5.5
± 0.1
± 0.5
± 1
± 5
± 1
± 5
µA
µA
I
I
High Impedance
Output Leakage
Current
V
= V
or V
OZB
IA
IHA ILA
V
= V
or
I/OB
CCB
GND
= V
I
Quiescent Supply 3.6
Current
5.5
5.5
V
V
or
5
50
50
µA
CCtB
IA
IB
CCA
GND
= V
or
CCB
GND
= V
∆I
Maximum
3.6
V
or
1.35
1.5
1.5
mA
CCtB
IA
CCA
Quiescent Supply
Current / Input
GND
= V
V
- 2.1V
CCB
IB
5/12
74LVXC3245
DINAMIC SWITCHING CHARACTERISTICS
Test Condition
Value
T
= 25 °C
Symbol
Parameter
-40 to 85 °C -55 to 125°C Unit
A
V
V
CCB
CCA
(V)
(V)
Min. Typ. Max. Min. Max. Min. Max.
V
Dynamic Low
Level Quiet
Output (note 1, 2)
3.3
3.3
3.3
3.3
5.5
5.5
5.5
5.5
1.0
-0.6
0.8
1.5
OLPA
OLPB
V
V
V
V
V
V
-1.2
-0.8
V
Dynamic Low
Level Quiet
Output (note 1, 2)
1.2
-0.5
V
Dynamic High
Voltage Input
(note 1, 3)
IHDA
3.3
3.3
3.3
3.3
5.5
5.5
5.5
5.5
2
2
V
Dynamic Low
Voltage Input
(note 1, 3)
ILDA
0.8
V
Dynamic High
Voltage Input
(note 1, 3)
IHDB
V
Dynamic Low
Voltage Input
(note 1, 3)
ILDB
0.8
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 ). 0V to threshold
ILD
(V ) f = 1MHz
IHD
6/12
74LVXC3245
AC ELECTRICAL CHARACTERISTICS (C = 50pF, Input t = t = 3ns)
L
r
f
(3)
Test Condition
Value
Symbol
Parameter
Unit
T
= 25°C
-40 to 85°C -55 to 125°C
A
V
CCB
(V)
Min. Typ. Max. Min. Max. Min. Max.
t
t
Propagation Delay 3.0(*)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
5.5
4.8
5.2
3.9
6.0
4.7
6.1
4.8
6.3
4.0
4.5
8.5
8.0
8.0
6.5
9.0
8.0
9.5
8.5
9.5
8.0
8.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
9.0
8.5
8.5
7.0
9.5
8.5
10.0
9.0
10.0
8.5
8.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
9.5
9.
PLH
PHL
Time (An to Bn)
5.0(**)
ns
ns
Propagation Delay 3.0(*)
9.0
7.5
9.5
8.5
10.5
9.5
10.5
8.5
8.5
Time (An to Bn)
5.0(**)
t
t
Output Enable
Time (G to Bn)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
PZL
Output Enable
Time (G to Bn)
PZH
t
Output Disable
Time (G to Bn)
PLZ
PHZ
ns
t
Output Disable
Time (G to Bn)
1.0
3.8
7.5
1.0
8.0
1.0
8.5
t
t
Propagation Delay 3.0(*)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
4.4
3.8
5.1
4.3
6.4
5.9
5.8
5.4
5.2
4.6
3.4
3.1
0.5
0.5
7.0
6.5
7.5
7.5
10.0
9.5
9.0
9.0
9.5
9.5
6.5
6.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
7.5
7.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
7.5
7.5
PLH
PHL
Time (Bn to An)
5.0(**)
ns
ns
3.0(*)
5.0(**)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
3.0(*)
5.0(**)
8.0
8.5
Propagation Delay
Time (Bn to An)
8.0
8.5
t
t
Output Enable
Time (G to An)
10.5
10.0
9.5
10.5
10.5
9.5
PZL
Output Enable
Time (G to An)
PZH
9.5
9.5
t
Output Disable
Time (G to An)
10.0
10.0
7.0
10.5
10.5
7.5
PLZ
PHZ
ns
ns
t
Output Disable
Time (G to An)
7.0
7.5
t
t
Output To Output
Skew Time (note1,
2)
1.5
1.5
OSLH
1.5
1.5
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 switch-
ing in the same direction, either HIGH or LOW (t
2) Parameter guaranteed by design
= | t
- t
|, t
= | t
- t
|
OSLH
PLHm PLHn OSHL
PHLm PHLn
3) Typical values referred at V
= 3.3V, V
= 5.0V or V
= 3.3V, V
= 3.3V
CCB
CCA
CCB
CCA
(*) Voltage Range is 3.0V ± 0.3
(**) Voltage Range is 5.0V ± 0.5
7/12
74LVXC3245
CAPACITIVE CHARACTERISTICS
Test Condition
Value
T
= 25 °C
Symbol
Parameter
-40 to 85 °C -55 to 125°C Unit
A
V
V
CCB
CCA
(V)
(V)
Min. Typ. Max. Min. Max. Min. Max.
C
Input
Capacitance
open open
4.5
10
55
10
10
10
V
V
V
INA
C
C
Input/Output
Capacitance
3.3
3.3
5.0
5.0
I/O
PD
Dynamic Low
Level Quiet
Output (note 1)
A to B
C
Dynamic Low
Level Quiet
Output (note 1)
B to A
3.3
5.0
40
V
PD
1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
PD
load. (Refer to Test Circuit). Average current can be obtained by the following equation. I
= C x V x f + I /8 (per circuit)
CC(opr)
PD CC IN CC
TEST CIRCUIT
TEST
SWITCH
t
t
t
, t
Open
PLH PHL
, t
2V
CC
PZLH PLZ
, t
Open
PZH PHZ
C
R
R
= 50pF or equivalent (includes jig and probe capacitance)
L
L
T
= R = 500Ω or equivalent
1
= Z
of pulse generator (typically 50Ω)
OUT
8/12
74LVXC3245
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
9/12
74LVXC3245
SO-24 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
2.65
0.2
MIN.
TYP.
MAX.
0.104
0.008
0.096
0.019
0.012
A
a1
a2
b
0.1
0.004
2.45
0.49
0.32
0.35
0.23
0.014
0.009
b1
C
0.5
0.020
c1
D
45° (typ.)
15.20
10.00
15.60
10.65
0.598
0.393
0.614
0.419
E
e
1.27
0.050
0.550
e3
F
13.97
7.40
0.50
7.60
1.27
0.291
0.020
0.300
0.050
L
S
8° (max.)
L
c1
b
e
s
e3
E
D
24
13
1
12
PO13T
10/12
74LVXC3245
TSSOP24 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
1.1
MIN.
TYP.
MAX.
0.043
0.006
A
A1
A2
b
0.05
0.15
0.002
0.9
0.035
0.19
0.09
7.7
0.30
0.20
7.9
0.0075
0.0035
0.303
0.246
0.169
0.0118
0.0079
0.311
0.256
0.177
c
D
E
6.25
4.3
6.5
E1
e
4.5
0.65 BSC
0.0256 BSC
K
0°
8°
0°
8°
L
0.50
0.70
0.020
0.028
A2
A
K
L
b
e
A1
E
c
D
E1
PIN 1 IDENTIFICATION
1
7047476A
11/12
74LVXC3245
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 resultfrom
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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12/12
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