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744ALS245A-1D [NXP]

Octal transceiver 3-State; 八路收发器三态
744ALS245A-1D
型号： 744ALS245A-1D
厂家： NXP    NXP
描述：

Octal transceiver 3-State
八路收发器三态
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中文：  中文翻译
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INTEGRATED CIRCUITS  
74ALS245A/74ALS245A–1  
Octal transceiver (3–State)  
Product specification  
IC05 Data Handbook  
1991 Jun 03  
Philips  
Semiconductors  
Philips Semiconductors  
Product specification  
Octal transceiver (3-State)  
74ALS245A/74ALS245A-1  
FEATURES  
PIN CONFIGURATION  
• Octal bidirectional bus interface  
• 3-State buffer outputs sink 24mA and source 15mA  
1
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
V
CC  
T/R  
A0  
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  
5
A3  
6
A4  
DESCRIPTION  
7
A5  
The 74ALS245A 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.  
8
A6  
9
A7  
B6  
B7  
10  
GND  
The 74ALS245A-1 is the same as the 74ALS245A except that both  
SF00198  
ports sink 48mA within the ±5% V range.  
CC  
ORDERING INFORMATION  
TYPICAL  
PROPAGATION  
DELAY  
TYPICAL  
SUPPLY CURRENT  
(TOTAL)  
ORDER CODE  
TYPE  
DRAWING  
NUMBER  
COMMERCIAL RANGE  
DESCRIPTION  
V
CC  
= 5V ±10%,  
74ALS245A  
7.0ns  
7.0ns  
34mA  
34mA  
T
amb  
= 0°C to +70°C  
74ALS245A-1  
74ALS245AN,  
74ALS245A-1N  
20-pin plastic DIP  
20-pin plastic SOL  
SOT146-1  
SOT163-1  
SOT339-1  
74ALS245AD,  
744ALS245A-1D  
20-pin plastic SSOP  
Type II  
74ALS245ADB,  
74ALS245A-1DB  
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.  
2
1991 Jun 03  
853–0011 02709  
Philips Semiconductors  
Product specification  
Octal transceiver (3-State)  
74ALS245A/74ALS245A-1  
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  
LOGIC DIAGRAM  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
2
3
4
5
6
7
8
9
19  
OE  
1
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  
3
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3-State)  
74ALS245A/74ALS245A-1  
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  
–0.5 to +7.0  
–0.5 to +7.0  
–30 to +5  
UNIT  
V
V
CC  
Supply voltage  
Input voltage  
Input current  
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  
4.5  
MAX  
V
CC  
Supply voltage  
5.5  
V
V
High-level input voltage  
Low-level input voltage  
Input clamp current  
High-level output current  
2.0  
V
IH  
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  
4
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3-State)  
74ALS245A/74ALS245A-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  
5
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3-State)  
74ALS245A/74ALS245A-1  
AC WAVEFORMS  
For all waveforms, V = 1.3V.  
M
OE  
V
V
M
An, Bn  
Bn, An  
V
V
t
M
M
M
t
t
t
PLZ  
PLH  
PHL  
PZL  
3.5V  
An, Bn  
V
M
V
V
M
M
V
+0.3V  
OL  
SC00096  
SC00095  
Waveform 1. Propagation Delay for Non-inverting Outputs  
Waveform 3. 3-State Output Enable Time to Low Level  
and Output Disable Time from Low Level  
OE  
V
V
M
M
V
-0.3V  
OH  
t
t
PHZ  
PZH  
An, Bn  
V
M
0V  
SC00094  
Waveform 2. 3-State Output Enable Time to High Level  
and Output Disable Time from High 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
w
t
t
THL  
Amplitude  
DEFINITIONS:  
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  
6
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3–State)  
74ALS245A/74ALS245A–1  
DIP20: plastic dual in-line package; 20 leads (300 mil)  
SOT146-1  
7
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3–State)  
74ALS245A/74ALS245A–1  
SO20: plastic small outline package; 20 leads; body width 7.5 mm  
SOT163-1  
8
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3–State)  
74ALS245A/74ALS245A–1  
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm  
SOT339-1  
9
1991 Jun 03  
Philips Semiconductors  
Product specification  
Octal transceiver (3–State)  
74ALS245A/74ALS245A–1  
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  
Preproduction Product  
Full Production  
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  
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 1997  
All rights reserved. Printed in U.S.A.  
Sunnyvale, California 94088–3409  
Telephone 800-234-7381  
Philips  
Semiconductors  

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