N74ALS645AD [PHILIPS]
Bus Driver/Transceiver, 1-Func, 8-Bit, True Output, TTL, PDSO20,;
| 型号： | N74ALS645AD |
| 厂家： | 
PHILIPS SEMICONDUCTORS |
| 描述： | Bus Driver/Transceiver, 1-Func, 8-Bit, True Output, TTL, PDSO20, 光电二极管 逻辑集成电路 |
| 文件： | 总8页 (文件大小：79K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74ALS645A/74ALS645A–1
Octal transceiver (3–State)
Product specification
IC05 Data Handbook
1991 Jun 03
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
FEATURES
PIN CONFIGURATION
• Octal bidirectional bus interface
1
20
19
18
17
16
15
14
13
12
11
V
CC
T/R
A0
• 3-State buffer outputs sink 24mA and source 15mA
2
3
OE
B0
B1
B2
B3
B4
B5
• Outputs are placed in high impedance state during power-off
A1
conditions
4
A2
• The -1 version sinks 48mA I within the +5% V range
OL
CC
5
A3
6
A4
7
A5
DESCRIPTION
8
The 74ALS645A is an octal transceiver featuring non-inverting
3-State bus compatible outputs in both transmit and receive
directions. The device features an output enable (OE) input for easy
cascading and transmit/receive (R/T) input for direction control.
A6
9
A7
B6
B7
10
GND
SF00198
The 74ALS645A-1 is the same as the 74ALS645A except that both
ports sink 48mA within the ±5% V range.
CC
ORDERING INFORMATION
ORDER CODE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
DRAWING
NUMBER
TYPE
COMMERCIAL RANGE
DESCRIPTION
V
CC
= 5V ±10%,
T
amb
= 0°C to +70°C
74ALS645A
7.0ns
7.0ns
34mA
34mA
74ALS645AN,
74ALS645A-1N
20-pin plastic DIP
20-pin plastic SOL
SOT146-1
SOT163-1
74ALS645A-1
74ALS645AD,
744ALS645A-1D
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
PINS
DESCRIPTION
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
15mA/24mA
15mA/24mA
15mA/48mA
15mA/48mA
A0 – A7, B0 – B7
OE
Data inputs
1.0/1.0
Output Enable input (active-Low)
Transmit/receive input
A port outputs
1.0/1.0
T/R
1.0/1.0
A0 – A7
B0 – B7
A0 – A7
B0 – B7
750/240
750/240
750/480
750/480
B port outputs
A port outputs (-1 version)
B port outputs (-1 version)
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
19
1
G3
2
3
4
5
6
7
8
9
3EN1 [BA]
3EN2 [AB]
A0 A1
A2 A3
A4 A5
A6 A7
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
19
1
OE
2
T/R
B0 B1
B2
16
B3
B4 B5
B6 B7
18
17
15 14
13
12
11
V
= Pin 20
CC
GND = Pin 10
SC00097
SF00199
2
1991 Jun 03
853–0597 02709
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
LOGIC DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
2
3
4
5
6
7
8
9
19
1
OE
T/R
18
B0
17
B1
16
B2
15
B3
14
B4
13
B5
12
B6
11
B7
V
= Pin 20
CC
GND = Pin 10
SF00201
FUNCTION TABLE
INPUTS
OUTPUTS
OE
L
T/R
L
H
X
Bus B data to Bus A
Bus A data to Bus B
Z
L
H
H = High voltage level
L
X
Z
=
=
=
Low voltage level
Don’t care
High impedance “off” state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
SYMBOL
PARAMETER
RATING
UNIT
V
V
CC
Supply voltage
Input voltage
Input current
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
V
V
IN
IN
I
mA
V
V
OUT
Voltage applied to output in High output state
–0.5 to V
CC
All versions
-1 version
48
96
mA
mA
°C
°C
I
Current applied to output in Low output state
OUT
T
Operating free-air temperature range
Storage temperature range
0 to +70
amb
T
–65 to +150
stg
RECOMMENDED OPERATING CONDITIONS
LIMITS
NOM
5.0
SYMBOL
UNIT
PARAMETER
MIN
MAX
V
CC
Supply voltage
4.5
2.0
5.5
V
V
IH
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
V
V
0.8
–18
–15
24
V
IL
IK
I
mA
mA
mA
mA
I
OH
All versions
-1 version
I
OL
Low-level output current
1
48
Operating free-air temperature range
T
amb
0
+70
°C
NOTES:
1. The 48mA limit applies only under the condition of V = 5.0V ± 5%.
CC
3
1991 Jun 03
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
1
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
2
MIN
– 2
TYP
MAX
I
= –0.4mA
V
V
V
OH
CC
V
V
±10%, V = MAX,
IL
CC
= MIN
IH
I
= –3mA
2.4
3.2
OH
V
OH
High-level output voltage
V
V
= MIN, V = MAX,
IL
= MIN
CC
IH
I
= –15mA
2.0
V
OH
I
I
= 12mA
= 24mA
0.25
0.35
0.40
0.50
V
V
OL
V
V
= MIN, V = MAX,
IL
= MIN
CC
IH
All versions
-1 version
OL
V
Low-level output voltage
Input clamp voltage
OL
V
V
= 4.75V, V = MAX,
IL
= MIN
CC
IH
I
OL
= 48mA
0.35
0.50
V
V
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= MIN, I = I
IK
–0.73
–1.5
0.1
0.1
20
V
IK
I
OE or T/R
= MAX, V = 7.0V
mA
mA
µA
I
Input current at maxi-
mum input voltage
I
I
A or B ports
= MAX, V = 5.5V
I
3
I
IH
High-level input current
= MAX, V = 2.7V
I
3
I
Low-level input current
= MAX, V = 0.4V
–0.1
–112
45
mA
mA
mA
mA
mA
IL
I
4
I
Output current
= MAX, V = 2.25V
–30
O
O
I
I
28
40
44
CCH
I
55
I
Supply current (total)
V
CC
= MAX
CCL
CC
58
CCZ
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V = 5V, T = 25°C.
CC
amb
3. For I/O ports, the parameter I and I include the off-state current.
IH
IL
4. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
V
= 0°C to +70°C
= +5.0V ± 10%
amb
CC
SYMBOL
PARAMETER
TEST CONDITION
UNIT
C = 50pF, R = 500Ω
L
L
MIN
MAX
t
t
Propagation delay
An to Bn, Bn to An
2.0
2.0
10.0
10.0
PLH
PHL
Waveform 1
ns
ns
ns
t
Output enable time
to High or Low level
Waveform 2
Waveform 3
3.0
3.0
20.0
20.0
PZH
t
PZL
t
Output disable time
from High or Low level
Waveform 2
Waveform 3
2.0
4.0
10.0
15.0
PHZ
t
PLZ
4
1991 Jun 03
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
AC WAVEFORMS
For all waveforms, V = 1.3V.
M
An, Bn
Bn, An
V
V
t
M
M
t
PLH
PHL
V
V
M
M
SC00096
Waveform 1. Propagation Delay for Non-inverting Outputs
OE
OE
V
V
V
V
M
M
t
M
t
M
t
V
-0.3V
OH
t
PZH
PHZ
PZL
PLZ
3.5V
An, Bn
V
M
An, Bn
V
M
0V
V
+0.3V
OL
SC00094
SC00095
Waveform 2. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
Waveform 3. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
t
w
AMP (V)
0.3V
V
CC
90%
90%
7.0V
NEGATIVE
PULSE
V
V
M
M
10%
10%
V
V
OUT
R
R
IN
L
L
PULSE
GENERATOR
D.U.T.
t
t )
f
t
t )
THL ( f
TLH ( r
R
C
L
T
t
t )
t
t )
TLH ( r
THL ( f
AMP (V)
0.3V
90%
90%
POSITIVE
PULSE
V
V
M
M
Test Circuit for 3-State Outputs
SWITCH POSITION
10%
10%
t
w
TEST
, t
SWITCH
closed
Input Pulse Definition
INPUT PULSE REQUIREMENTS
t
PLZ PZL
All other
open
Family
V
M
Rep.Rate
t
t
t
THL
Amplitude
DEFINITIONS:
w
TLH
R
L
C
L
R
T
=
=
=
Load resistor;
2.0ns
2.0ns
74ALS
3.5V
1.3V
1MHz
500ns
see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
Termination resistance should be equal to Z
pulse generators.
of
OUT
SC00072
5
1991 Jun 03
Philips Semiconductors
Product specification
Octal transceiver (3–State)
74ALS645A/74ALS645A–1
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
6
1991 Jun 03
Philips Semiconductors
Product specification
Octal transceiver (3–State)
74ALS645A/74ALS645A–1
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
7
1991 Jun 03
Philips Semiconductors
Product specification
Octal transceiver (3–State)
74ALS645A/74ALS645A–1
Data sheet status
[1]
Data sheet
status
Product
status
Definition
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
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.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,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.
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
9397-750-03308
Document order number:
Philips
Semiconductors
相关型号：
N74ALS646-1N
IC ALS SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24, Bus Driver/Transceiver
NXP
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