TC74VHC245FK_12 [TOSHIBA]
Octal Bus Transceiver;
| 型号： | TC74VHC245FK_12 |
| 厂家： | 
TOSHIBA |
| 描述： | Octal Bus Transceiver |
| 文件： | 总9页 (文件大小：211K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC74VHC245F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC245F,TC74VHC245FT,TC74VHC245FK
Octal Bus Transceiver
The TC74VHC245 is an advanced high speed CMOS OCTAL
BUS TRANSCEIVER fabricated with silicon gate C2MOS
technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
It is intended for two-way asynchronous communication
between data busses. The direction of data transmission is
determined by the level of the DIR input.
The enable input ( G ) can be used to disable the device so that
the busses are effectively isolated.
TC74VHC245F
TC74VHC245FT
TC74VHC245FK
All inputs are equipped with protection circuits against static
discharge.
Features (Note 1) (Note 2) (Note 3)
•
•
•
•
•
•
•
High speed: t = 4.0 ns (typ.) at V
= 5 V
pd
CC
Low power dissipation: I
= 4 μA (max) at Ta = 25°C
CC
High noise immunity: V
= V
= 28% V
(min)
NIH
NIL
CC
∼
−
Balanced propagation delays: t
t
pHL
pLH
Wide operating voltage range: V
= 2 V to 5.5 V
CC (opr)
Low noise: V
= 1.0 V (max)
OLP
Pin and function compatible with 74ALS245
Note 1: Do not apply a signal to any bus terminal when it is in
the output mode. Damage may result.
Note 2: All floating (high impedance) bus terminals must have
their input levels fixed by means of pull up or pull down
resistors.
Weight
SOP20-P-300-1.27A
TSSOP20-P-0044-0.65A : 0.08 g (typ.)
VSSOP20-P-0030-0.50
: 0.22 g (typ.)
Note 3: A parasitic diode is formed between the bus and V
CC
terminals. Therefore bus terminal can not be used to
interface 5 V to 3 V systems directly.
: 0.03 g (typ.)
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TC74VHC245F/FT/FK
Pin Assignment
IEC Logic Symbol
(19)
(1)
G3
G
DIR
A1
A2
A3
A4
A5
A6
A7
A8
1
2
3
4
5
6
7
8
9
20
19
V
CC
DIR
3 EN 1 [BA]
3 EN 2 [AB]
G
(2)
(18)
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
1
B1
A1
2
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(17)
(16)
(15)
(14)
(13)
(12)
(11)
A2
A3
A4
A5
A6
A7
A8
B2
B3
B4
B5
B6
B7
B8
GND 10
(top view)
Truth Table
Inputs
Function
Output
G
L
DIR
L
A Bus
B Bus
Input
Output
Input
A = B
B = A
Z
L
H
Output
H
X
Z
X: Don’t care
Z: High impedance
Absolute Maximum Ratings (Note)
Characteristics
Supply voltage range
Symbol
Rating
Unit
V
−0.5 to 7.0
−0.5 to 7.0
V
V
CC
DC input voltage (DIR, G )
DC bus I/O voltage
Input diode current
V
IN
I/O
IK
V
I
−0.5 to V
CC
+ 0.5
V
−20
mA
mA
mA
mA
mW
°C
Output diode current
DC output current
I
±20
±25
OK
I
OUT
DC V /ground current
CC
I
±75
CC
Power dissipation
P
180
D
Storage temperature
T
stg
−65 to 150
Note:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
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TC74VHC245F/FT/FK
Operating Ranges (Note)
Characteristics
Symbol
Rating
Unit
Supply voltage
V
2.0 to 5.5
0 to 5.5
V
V
CC
Input voltage (DIR, G )
Bus I/O voltage
V
IN
I/O
opr
V
0 to V
CC
V
Operating temperature
T
−40 to 85
0 to 100 (V = 3.3 ± 0.3 V)
°C
CC
0 to 20 (V
Input rise and fall time
dt/dv
ns/V
= 5 ± 0.5 V)
CC
Note:
The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs and
bus inputs must be tied to either V or GND. Please connect both bus inputs and the bus outputs with V
CC CC
or GND when the I/O of the bus terminal changes by the function. In this case, please note that the output is
not short-circuited.
Electrical Characteristics
DC Characteristics
Ta =
−40 to 85°C
Test Condition
Ta = 25°C
Typ.
Characteristics
Symbol
Unit
V
V
(V)
CC
Min
Max
Min
Max
2.0
1.50
1.50
―
―
―
―
―
―
High-level input
voltage
3.0
to
5.5
V
IH
―
―
V
CC
0.7
×
V
×
CC
0.7
2.0
0.50
0.50
―
―
―
―
―
―
Low-level input
voltage
3.0
to
5.5
V
IL
V
V
V
×
V
×
CC
0.3
CC
0.3
2.0
3.0
4.5
3.0
4.5
2.0
3.0
4.5
3.0
4.5
1.9
2.9
4.4
2.58
3.94
―
2.0
3.0
4.5
―
―
―
1.9
2.9
4.4
2.48
3.80
―
―
―
I
= −50 μA
OH
V
IN
= V or
High-level output
voltage
V
OH
―
―
IH
V
IL
I
I
= −4 mA
= −8 mA
―
―
OH
―
―
―
OH
0.0
0.0
0.0
―
0.1
0.1
0.1
0.36
0.36
0.1
0.1
0.1
0.44
0.44
I
= 50 μA
―
―
OL
V
IN
Low-level output
voltage
V
OL
= V or
―
―
V
IH
V
IL
I
I
= 4 mA
= 8 mA
―
―
OL
―
―
―
OL
V
V
= V or V
IH
IN
IL
3-state output
off-state current
I
5.5
―
―
±0.25
―
±2.50
μA
OZ
= V
CC
or GND
OUT
Input leakage
current
0 to
5.5
I
V
= 5.5 V or GND
―
―
―
―
±0.1
4.0
―
―
±1.0
40.0
μA
μA
IN
IN
IN
Quiescent supply
current
I
V
= V
CC
or GND
5.5
CC
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TC74VHC245F/FT/FK
AC Characteristics (input: t = t = 3 ns)
r
f
Ta = −40 to
Test Condition
(V)
Ta = 25°C
85°C
Characteristics
Symbol
Unit
ns
V
CC
C (pF)
L
Min
―
―
―
―
―
―
―
―
―
―
―
―
―
―
Typ.
5.8
8.3
4.0
5.5
8.5
11.0
5.8
7.3
11.5
7.0
―
Max
8.4
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
―
Max
15
50
15
50
15
50
15
50
50
50
50
50
10.0
13.5
6.5
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
t
11.9
5.5
pLH
Propagation delay
time
―
t
pHL
7.5
8.5
13.2
16.7
8.5
15.5
19.0
10.0
12.0
18.0
11.0
1.5
t
t
pZL
3-state output enable
time
R = 1 kΩ
ns
L
pZH
10.6
15.8
9.7
t
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
pLZ
3-state output disable
time
R = 1 kΩ
ns
ns
L
t
pHZ
t
t
1.5
osLH
Output to output skew
(Note 1)
―
1.0
―
1.0
osHL
Input capacitance
C
DIR, G
A , Bn
4
10
―
10
pF
pF
IN
Bus input capacitance
C
I/O
8
―
―
―
n
Power dissipation
capacitance
C
PD
(Note 2)
―
21
―
―
―
pF
Note 1: Parameter guaranteed by design.
= |t − t |, t
t
= |t
− t |
pHLn
osLH
pLHm
pLHn osHL
pHLm
Note 2:
C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
= C ·V ·f + I
PD CC IN
/ 8 (per bit)
CC
CC (opr)
Noise Characteristics (input: t = t = 3 ns) (Note)
r
f
Test Condition
Ta = 25°C
Characteristics
Symbol
Unit
V
V
(V)
Typ.
Max
CC
Quiet output maximum dynamic
V
OLP
V
OLV
C = 50 pF
5.0
0.7
1.0
L
V
OL
Quiet output minimum dynamic
C = 50 pF
L
5.0
−0.7
−1.0
V
V
OL
Minimum high level dynamic input
voltage
V
C = 50 pF
5.0
5.0
―
―
3.5
1.5
V
V
IHD
L
Maximum low level dynamic input
voltage
V
C = 50 pF
L
ILD
4
2009-04-01
TC74VHC245F/FT/FK
Input Equivalent Circuit
Bus Terminal Equivalent Circuit
A , Bn
n
DIR, G
I/O
INPUT
5
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TC74VHC245F/FT/FK
Package Dimensions
Weight: 0.22 g (typ.)
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TC74VHC245F/FT/FK
Package Dimensions
Weight: 0.08 g (typ.)
7
2009-04-01
TC74VHC245F/FT/FK
Package Dimensions
Weight: 0.03 g (typ.)
8
2009-04-01
TC74VHC245F/FT/FK
RESTRICTIONS ON PRODUCT USE
•
•
•
Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information
in this document, and related hardware, software and systems (collectively “Product”) without notice.
This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with
TOSHIBA’s written permission, reproduction is permissible only if reproduction is without alteration/omission.
Though TOSHIBA works continually to improve Product’s quality and reliability, Product can malfunction or fail. Customers are
responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and
systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily
injury or damage to property, including data loss or corruption. Before creating and producing designs and using, customers must
also refer to and comply with (a) the latest versions of all relevant TOSHIBA information, including without limitation, this document,
the specifications, the data sheets and application notes for Product and the precautions and conditions set forth in the “TOSHIBA
Semiconductor Reliability Handbook” and (b) the instructions for the application that Product will be used with or for. Customers are
solely responsible for all aspects of their own product design or applications, including but not limited to (a) determining the
appropriateness of the use of this Product in such design or applications; (b) evaluating and determining the applicability of any
information contained in this document, or in charts, diagrams, programs, algorithms, sample application circuits, or any other
referenced documents; and (c) validating all operating parameters for such designs and applications. TOSHIBA ASSUMES NO
LIABILITY FOR CUSTOMERS’ PRODUCT DESIGN OR APPLICATIONS.
•
Product is intended for use in general electronics applications (e.g., computers, personal equipment, office equipment, measuring
equipment, industrial robots and home electronics appliances) or for specific applications as expressly stated in this document.
Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or
reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious
public impact (“Unintended Use”). Unintended Use includes, without limitation, equipment used in nuclear facilities, equipment used
in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling
equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric
power, and equipment used in finance-related fields. Do not use Product for Unintended Use unless specifically permitted in this
document.
•
•
Do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy Product, whether in whole or in part.
Product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any
applicable laws or regulations.
•
•
The information contained herein is presented only as guidance for Product use. No responsibility is assumed by TOSHIBA for any
infringement of patents or any other intellectual property rights of third parties that may result from the use of Product. No license to
any intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise.
ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE
FOR PRODUCT, AND TO THE MAXIMUM EXTENT ALLOWABLE BY LAW, TOSHIBA (1) ASSUMES NO LIABILITY
WHATSOEVER, INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR
LOSS, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS, LOSS OF OPPORTUNITIES, BUSINESS INTERRUPTION AND
LOSS OF DATA, AND (2) DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES AND CONDITIONS RELATED TO
SALE, USE OF PRODUCT, OR INFORMATION, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, ACCURACY OF INFORMATION, OR NONINFRINGEMENT.
•
•
Do not use or otherwise make available Product or related software or technology for any military purposes, including without
limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile
technology products (mass destruction weapons). Product and related software and technology may be controlled under the
Japanese Foreign Exchange and Foreign Trade Law and the U.S. Export Administration Regulations. Export and re-export of Product
or related software or technology are strictly prohibited except in compliance with all applicable export laws and regulations.
Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product.
Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances,
including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of
noncompliance with applicable laws and regulations.
9
2009-04-01
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