TC74HC237AF(F) [TOSHIBA]
TC74HC237AF(F);
| 型号： | TC74HC237AF(F) |
| 厂家： | 
TOSHIBA |
| 描述： | TC74HC237AF(F) 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总9页 (文件大小：259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC74HC237AP/AF
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC237AP,TC74HC237AF
3-to-8 Line Decoder/Latch
The TC74HC237A is a high speed CMOS 3-to-8 LINE
DECODER ADDRESS LATCH fabricated with silicon gate
C2MOS technology.
TC74HC237AP
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
It is composed of a 3-bit input latches with a common GL
enable input and 3-to-8 line decoder with enable inputs G1 and
G2 . The 3-bit binary data is stored into the input latch on the
high level of GL . The value of this data determines which one of
the outputs will go low.
When the enable input G1 is held low or G2 is held high,
decoding function is inhibited and all the 8 outputs go high. The
two enable inputs are provided to ease cascade connection and
permits the application address decoder for memory system.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
TC74HC237AF
Features
•
•
•
•
•
•
•
•
High speed: t = 12 ns (typ.) at V
= 5 V
pd
CC
Low power dissipation: I
= 4 μA (max) at Ta = 25°C
CC
Weight
DIP16-P-300-2.54A
SOP16-P-300-1.27A
: 1.00 g (typ.)
: 0.18 g (typ.)
High noise immunity: V
= V
= 28% V
(min)
NIH
NIL
CC
Output drive capability: 10 LSTTL loads
Symmetrical output impedance: |I | = I
= 4 mA (min)
OL
OH
∼
−
Balanced propagation delays: t
t
pHL
pLH
Wide operating voltage range: V
(opr) = 2~6 V
CC
Pin and function compatible with 74LS237
Pin Assignment
1
2007-10-01
TC74HC237AP/AF
IEC Logic Symbol
Truth Table
Inputs
Outputs
Enable
Address
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
GL
X
X
L
G2
X
H
L
G1
L
C
X
X
L
B
X
X
L
A
X
X
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
X
H
H
H
H
H
H
H
H
L
L
L
L
H
L
L
L
L
H
H
L
L
L
L
H
L
L
L
H
H
H
H
L
L
L
H
L
L
L
H
H
L
L
H
Depends upon the address previously applied while GL was
at a low level
H
L
H
X
X
X
X: Don’t care
System Diagram
2
2007-10-01
TC74HC237AP/AF
Absolute Maximum Ratings (Note 1)
Characteristics
Supply voltage range
Symbol
Rating
Unit
V
−0.5~7
V
V
CC
DC input voltage
V
−0.5~V
+ 0.5
IN
CC
CC
DC output voltage
Input diode current
Output diode current
DC output current
V
−0.5~V
+ 0.5
V
OUT
I
±20
±20
±25
±50
mA
mA
mA
mA
mW
°C
IK
I
OK
I
OUT
DC V /ground current
CC
I
CC
Power dissipation
P
500 (DIP) (Note 2)/180 (SOP)
D
Storage temperature
T
stg
−65~150
Note 1: 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).
Note 2: 500 mW in the range of Ta = −40 to 65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C shall be
applied until 300 mW.
Operating Ranges (Note)
Characteristics
Supply voltage
Symbol
Rating
2~6
Unit
V
V
V
CC
Input voltage
V
0~V
0~V
IN
CC
CC
Output voltage
V
OUT
V
Operating temperature
T
opr
−40~85
°C
0~1000 (V
= 2.0 V)
CC
CC
CC
Input rise and fall time
t , t
0~500 (V
0~400 (V
= 4.5 V)
= 6.0 V)
ns
r
f
Note:
The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND.
3
2007-10-01
TC74HC237AP/AF
Electrical Characteristics
DC Characteristics
Test Condition
Ta = 25°C
Typ.
⎯
Ta = −40~85°C
Characteristics
Symbol
Unit
V
CC
(V)
Min
1.50
3.15
4.20
⎯
Max
⎯
Min
1.50
3.15
4.20
⎯
Max
⎯
2.0
High-level input
voltage
V
IH
⎯
⎯
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
⎯
⎯
⎯
V
V
⎯
⎯
⎯
⎯
0.50
1.35
1.80
⎯
0.50
1.35
1.80
⎯
Low-level input
voltage
V
IL
⎯
⎯
⎯
⎯
⎯
⎯
1.9
4.4
5.9
4.18
5.68
⎯
2.0
1.9
4.4
5.9
4.13
5.63
⎯
I
= −20 μA
4.5
⎯
⎯
OH
High-level output
voltage
V
IN
V
OH
6.0
⎯
⎯
V
V
= V or V
IH IL
I
I
= −4 mA
4.31
5.80
0.0
⎯
⎯
OH
= −5.2 mA
⎯
⎯
OH
0.1
0.1
0.1
0.26
0.26
0.1
0.1
0.1
0.33
0.33
I
= 20 μA
⎯
0.0
⎯
OL
Low-level output
voltage
V
IN
V
OL
⎯
0.0
⎯
= V or V
IH IL
I
I
= 4 mA
⎯
0.17
0.18
⎯
OL
= 5.2 mA
⎯
⎯
OL
Input leakage
current
I
V
V
= V
= V
or GND
or GND
6.0
6.0
⎯
⎯
⎯
⎯
±0.1
⎯
⎯
±1.0
μA
μA
IN
IN
CC
Quiescent supply
current
I
4.0
40.0
CC
IN
CC
Timing Requirements (input: t = t = 6 ns)
r
f
Ta =
−40
Test Condition
Ta = 25°C
Characteristics
Symbol
Unit
ns
~85°C
V
CC
(V)
Typ.
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Limit
75
15
13
50
10
9
Limit
95
19
16
65
13
11
30
6
2.0
Minimum pulse width
( GL )
t
⎯
⎯
⎯
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
W (L)
Minimum set-up time
(A, B, C- GL )
t
s
ns
25
5
Minimum hold time
(A, B, C- GL )
t
h
ns
5
5
4
2007-10-01
TC74HC237AP/AF
AC Characteristics (C = 15 pF, V = 5 V, Ta = 25°C, input: t = t = 6 ns)
L
CC
r
f
Characteristics
Symbol
Test Condition
Min
Typ.
4
Max
8
Unit
ns
t
t
TLH
Output transition time
⎯
⎯
⎯
⎯
⎯
⎯
THL
Propagation delay time
(G1-Y)
t
t
t
t
t
t
t
t
pLH
pHL
pLH
pHL
pLH
pHL
pLH
pHL
⎯
⎯
⎯
⎯
12
12
17
15
24
24
33
31
ns
ns
ns
ns
Propagation delay time
( G2 -Y)
Propagation delay time
( GL -Y)
Propagation delay time
(A, B, C-Y)
AC Characteristics (C = 50 pF, input: t = t = 6 ns)
L
r
f
Test Condition
Ta = 25°C
Ta = −40~85°C
Characteristics
Symbol
Unit
ns
V
CC
(V)
Min
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Typ.
30
8
Max
75
Min
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Max
95
2.0
t
t
TLH
Output transition time
⎯
⎯
⎯
⎯
⎯
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
15
19
THL
7
13
16
45
15
13
45
15
13
65
21
18
60
19
16
5
140
28
175
35
Propagation delay
time
t
t
pLH
ns
ns
ns
ns
pHL
(G1-Y)
24
30
140
28
175
35
Propagation delay
time
t
t
pLH
pHL
( G2 -Y)
24
30
190
38
240
48
Propagation delay
time
t
t
pLH
pHL
( GL -Y)
32
41
180
36
225
45
Propagation delay
time
t
t
pLH
pHL
(A, B, C-Y)
31
38
Input capacitance
C
IN
⎯
⎯
10
10
pF
pF
C
PD
Power dissipation
capacitance
⎯
52
⎯
⎯
⎯
(Note)
Note:
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
(opr) = C ･V ･f + I
PD CC IN
CC
CC
5
2007-10-01
TC74HC237AP/AF
Typical Application
6
2007-10-01
TC74HC237AP/AF
Package Dimensions
Weight: 1.00 g (typ.)
7
2007-10-01
TC74HC237AP/AF
Package Dimensions
Weight: 0.18 g (typ.)
8
2007-10-01
TC74HC237AP/AF
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
2007-10-01
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