74LV245PWDH [NXP]
Octal bus transceiver 3-State; 八路总线收发器三态
| 型号： | 74LV245PWDH |
| 厂家： | 
NXP |
| 描述： | Octal bus transceiver 3-State |
| 文件： | 总12页 (文件大小：120K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74LV245
Octal bus transceiver (3-State)
Product specification
1998 Apr 20
Supersedes data of 1997 Feb 19
IC24 Data Handbook
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
FEATURES
• Wide operating voltage: 1.0 to 5.5 V
• Optimized for low voltage applications: 1.0 to 3.6 V
• Accepts TTL input levels between V = 2.7 V and V = 3.6 V
DESCRIPTION
The 74LV245 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT245.
The 74LV245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both send and receive directions. The
74LV245 features an output enable (OE) input for easy cascading
and a send/receive (DIR) input for direction control. OE controls the
outputs so that the buses are effectively isolated.
CC
CC
• Typical V
(output ground bounce) < 0.8 V at V = 3.3 V,
OLP
= 25°C
CC
T
amb
• Typical V
(output V undershoot) > 2 V at V = 3.3 V,
OHV
= 25°C
OH
CC
T
amb
• Output capability: bus driver
• I category: MSI
CC
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; t = t ≤ 2.5 ns
amb
r
f
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
Propagation delay
A to B ; B to A
C = 15 pF;
L
t
/t
7.0
ns
PHL PLH
V
CC
= 3.3 V
n
n
n
n
C
C
Input capacitance
3.5
10
pF
pF
I
Input/output capacitance
I/O
V
= 3.3 V
CC
C
Power dissipation capacitance per buffer
40
pF
PD
V = GND to V , note 1
I
CC
NOTE:
1. C is used to determine the dynamic power dissipation (P in µW)
PD
D
2
2
P
= C V
f )ȍ (C V
f ) where:
D
PD
CC
i
L
CC o
f = input frequency in MHz; C = output load capacitance in pF;
i
L
f = output frequency in MHz; V = supply voltage in V;
o
CC
2
ȍ (C V
f ) = sum of the outputs.
L
CC
o
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
NORTH AMERICA
74LV245 N
PKG. DWG. #
SOT146-1
SOT163-1
SOT339-1
SOT360-1
20-Pin Plastic DIL
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
74LV245 N
74LV245 D
74LV245 DB
74LV245 PW
20-Pin Plastic SO
74LV245 D
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
74LV245 DB
74LV245PW DH
PIN DESCRIPTION
FUNCTION TABLE
PIN NUMBER
SYMBOL
FUNCTION
INPUTS
INPUTS/OUTPUT
1
DIR
Direction
OE
L
DIR
A
B
n
n
2, 3, 4, 5,
6, 7, 8, 9
L
H
X
A = B
Inputs
Z
Inputs
B = A
Z
A to A
0
Data inputs/outputs
Ground (0 V)
7
L
10
GND
H
18, 17, 16, 15,
14, 13, 12, 11
NOTES:
B to B
Data inputs/outputs
0
7
H
L
=
=
=
=
HIGH voltage level
LOW voltage level
don’t care
19
20
OE
Output enable input (active LOW)
Positive supply voltage
X
Z
V
CC
high impedance OFF-state
2
1998 Apr 20
853–1931 19258
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
PIN CONFIGURATION
LOGIC SYMBOL
DIR
1
1
DIR
20
19
V
CC
OE
19
A
0
OE
2
3
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
A
1
18
17
16
15
B
0
2
3
4
5
6
7
8
9
B
B
B
B
B
B
B
B
0
1
2
3
4
5
6
7
18
17
16
15
14
13
12
11
4
5
6
7
8
9
A
2
B
1
A
3
B
2
A
A
A
A
B
B
B
B
B
4
5
6
7
3
14
13
12
11
4
5
6
7
GND 10
SV00624
LOGIC SYMBOL (IEEE/IEC)
19
G3
1
3EN1
3EN2
SV00625
1
2
18
2
17
16
15
14
13
12
11
3
4
5
6
7
8
9
SV00626
3
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
CONDITIONS
MIN
1.0
0
TYP.
3.3
–
MAX
UNIT
V
CC
DC supply voltage
See Note 1
5.5
V
V
V
V
I
Input voltage
V
CC
V
CC
V
O
Output voltage
0
–
See DC and AC
characteristics
–40
–40
+85
+125
T
amb
Operating ambient temperature range in free air
°C
V
CC
V
CC
V
CC
V
CC
= 1.0V to 2.0V
= 2.0V to 2.7V
= 2.7V to 3.6V
= 3.6V to 5.5V
–
–
–
–
–
–
–
–
500
200
100
50
t , t
r
Input rise and fall times
ns/V
f
NOTE:
1. The LV is guaranteed to function down to V = 1.0V (input levels GND or V ); DC characteristics are guaranteed from V = 1.2V to
CC
CC
CC
V
CC
= 5.5V.
1, 2
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0V).
SYMBOL
PARAMETER
DC supply voltage
CONDITIONS
RATING
UNIT
V
V
CC
–0.5 to +7.0
DC input diode current
DC output diode current
V < –0.5 or V > V + 0.5V
20
50
mA
mA
"I
I
I
CC
IK
V
O
< –0.5 or V > V + 0.5V
O CC
"I
OK
DC output source or sink current
– bus driver outputs
–0.5V < V < V + 0.5V
mA
"I
O
CC
O
35
DC V or GND current for types with
– bus driver outputs
CC
"I
"I
,
mA
GND
70
CC
T
stg
Storage temperature range
–65 to +150
°C
Power dissipation per package
– plastic DIL
– plastic mini-pack (SO)
for temperature range: –40 to +125°C
above +70°C derate linearly with 12 mW/K
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
750
500
400
P
TOT
mW
– plastic shrink mini-pack (SSOP and TSSOP)
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 input and output voltage ratings may be exceeded if the input and output current ratings are observed.
4
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V).
LIMITS
MAX
-40°C to +85°C
-40°C to +125°C
SYMBOL
PARAMETER
TEST CONDITIONS
= 1.2V
UNIT
1
MIN
0.9
TYP
MIN
0.9
MAX
V
V
V
V
V
V
V
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
CC
CC
= 2.0V
1.4
1.4
HIGH level Input
voltage
V
IH
V
= 2.7 to 3.6V
= 4.5 to 5.5V
= 1.2V
2.0
2.0
0.7<V
0.7<V
CC
CC
0.3
0.6
0.8
0.3
0.6
0.8
= 2.0V
LOW level Input
voltage
V
IL
V
= 2.7 to 3.6V
= 4.5 to 5.5
0.3<V
0.3<V
CC
CC
= 1.2V; V = V or V –I = 100µA
1.2
2.0
2.7
3.0
4.5
CC
CC
CC
CC
CC
I
IH
IL;
O
= 2.0V; V = V or V –I = 100µA
1.8
2.5
2.8
4.3
1.8
2.5
2.8
4.3
I
IH
IL;
O
HIGH level output
voltage; all outputs
= 2.7V; V = V or V –I = 100µA
V
V
V
V
V
V
I
IH
IL;
O
OH
= 3.0V; V = V or V –I = 100µA
I
IH
IL;
O
= 4.5V;V = V or V –I = 100µA
I
IH
IL;
O
HIGH level output
voltage; BUS driver
outputs
V
CC
V
CC
= 3.0V;V = V or V –I = 8mA
2.40
3.60
2.82
4.20
2.20
3.50
I
IH
IL;
O
OH
= 4.5V;V = V or V –I = 16mA
I
IH
IL;
O
V
CC
V
CC
V
CC
V
CC
V
CC
= 1.2V; V = V or V I
IL; O
= 100µA
= 100µA
= 100µA
0
0
0
0
0
I
IH
= 2.0V; V = V or V
I
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
I
IH
IL; O
LOW level output
voltage; all outputs
= 2.7V; V = V or V
I
V
V
I
IH
IL; O
OL
= 3.0V;V = V or V I
= 100µA
I = 100µA
I
IH
IL; O
= 4.5V;V = V or V
IL; O
I
IH
LOW level output
voltage; BUS driver
outputs
V
= 3.0V;V = V or V
I
= 8mA
0.20
0.35
0.40
0.55
0.50
0.65
CC
CC
I
IH
IL; O
OL
V
= 4.5V;V = V or V
I
= 16mA
I
IH
IL; O
Input leakage
current
I
V
= 5.5V; V = V or GND
1.0
5
1.0
10
µA
µA
µA
I
CC
I
CC
3-State output
OFF-state current
V
V
= 5.5V; V = V or V
I IH IL;
CC
O
I
OZ
CC
= V or GND
CC
Quiescent supply
current; MSI
I
V
CC
= 5.5V; V = V or GND; I = 0
20.0
160
I
CC
O
Additional
quiescent supply
current
∆I
CC
V
CC
= 2.7V to 3.6V; V = V –0.6V
500
850
µA
I
CC
NOTE:
1. All typical values are measured at T
= 25°C.
amb
5
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
AC CHARACTERISTICS
GND = 0V; t = t ≤ 2.5ns; C = 50pF; R = 1KΩ
r
f
L
L
LIMITS
–40 to +85 °C
CONDITION
(V)
–40 to +125 °C
SYMBOL
PARAMETER
WAVEFORM
UNIT
1
V
CC
MIN
TYP
45
MAX
28
MIN
MAX
1.2
2.0
2.7
15
28
34
24
20
14
Propagation delay
A to B ;
11
19
t
t
Figures 1
ns
n
n
n
n
PHL/ PLH
B to A
2
3.0 to 3.6
4.5 to 5.5
9
16
3
8
11
1.2
2.0
55
19
14
31
23
18
14
39
29
23
18
3-State output enable time
t
t
Figures 2
Figures 2
ns
ns
OE to A ;
2.7
PZH/ PZL
n
n
OE to B
2
3.0 to 3.6
4.5 to 5.5
1.2
10
3
8.5
65
24
18
2.0
32
24
20
16
39
29
24
19
3-State output disable time
OE to A ;
n
n
t
t
2.7
PHZ/ PLZ
OE to B
2
3.0 to 3.6
4.5 to 5.5
14
3
11.5
NOTES:
1. Unless otherwise stated, all typical values are measured at T
= 25°C
amb
2. Typical values are measured at V = 3.3 V.
CC
3. Typical values are measured at V = 5.0 V.
CC
AC WAVEFORMS
V
V
V
= 1.5 V at V ≥ 2.7 V and ≤ 3.6 V
M
CC
= 0.5 V × V at V < 2.7 V and ≥ 4.5 V
M
CC
CC
and V are the typical output voltage drop that occur with the output load.
OL
OH
V = V + 0.3 V at V ≥ 2.7 V and ≤ 3.6 V
X
OL
CC
V = V + 0.1 × V at V < 2.7 V and ≥ 4.5 V
X
Y
Y
OL
CC
CC
V
V
= V – 0.3 V at V ≥ 2.7V and ≤ 3.6 V
OH CC
= V – 0.1 × V at V < 2.7 V and ≥ 4.5 V
OH
CC
CC
V
I
A , B INPUT
V
OE INPUT
GND
n
n
V
M
M
t
t
PZL
PLZ
V
CC
t
t
PLH
PHL
OUTPUT
LOW-to-OFF
OFF-to-LOW
V
M
V
V
X
V
OL
B , A OUTPUT
V
n
n
M
t
PZH
t
PHZ
V
OH
OUTPUT
SV00627
V
Y
HIGH-to-OFF
OFF-to-HIGH
M
Figure 1. Input (A , B ) to output
n
n
GND
outputs
disabled
(B , A ) propagation delays and the output transition times.
outputs
enabled
outputs
enabled
n
n
SV00628
Figure 2. 3-State enable and disable times.
6
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
TEST CIRCUIT
V
CC
2 * V
CC
Open
GND
R
R
= 1k
L
L
V
V
O
I
PULSE
GENERATOR
D.U.T.
= 1k
R
T
50 pF
C
L
Test Circuit for Outputs
DEFINITIONS
R
L
C
L
R
T
= Load resistor
= Load capacitance includes jig and probe capacitiance.
= Termination resistance should be equal to Z
of pulse generators.
OUT
SWITCH POSITION
S
TEST
V
V
I
1
CC
t
t
Open
2 * V
< 2.7V
V
CC
PLH/ PHL
t
t
t
2.7V
PLZ/ PZL
CC
2.7–3.6V
V
CC
w 4.5V
t
GND
PHZ/ PZH
SV00896
Figure 3. Load circuitry for switching times.
7
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
8
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
9
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
10
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
11
1998 Apr 20
Philips Semiconductors
Product specification
Octal bus transceiver (3-State)
74LV245
DEFINITIONS
Data Sheet Identification
Product Status
Definition
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Objective Specification
Formative or in Design
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Preliminary Specification
Product Specification
Preproduction Product
Full Production
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.
Philips Semiconductors and Philips Electronics North America Corporation reserve 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. Applications that are described herein for any of these products are for illustrative purposes
only. PhilipsSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertesting
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
orsystemswheremalfunctionofaPhilipsSemiconductorsandPhilipsElectronicsNorthAmericaCorporationProductcanreasonablybeexpected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code
Date of release: 05-96
9397-750-04438
Document order number:
Philips
Semiconductors
相关型号：
74LV245PWDH-T
IC LV/LV-A/LVX/H SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, PLASTIC, TSSOP1-20, Bus Driver/Transceiver
NXP
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