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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
* Octal bidirectional bus interface * 3-State buffer outputs sink 24mA and source 15mA * Outputs are placed in high impedance state during power-off
conditions
PIN CONFIGURATION
T/R 1 A0 A1 A2 A3 A4 2 3 4 5 6 7 8 9 20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
* The -1 version sinks 48mA IOL within the +5% VCC range
DESCRIPTION
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. The 74ALS645A-1 is the same as the 74ALS645A except that both ports sink 48mA within the 5% VCC range. TYPICAL PROPAGATION DELAY 7.0ns 7.0ns TYPICAL SUPPLY CURRENT (TOTAL) 34mA 34mA 20-pin plastic DIP 20-pin plastic SOL
A5 A6 A7
GND 10
SF00198
ORDERING INFORMATION
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C 74ALS645AN, 74ALS645A-1N 74ALS645AD, 744ALS645A-1D DRAWING NUMBER
TYPE 74ALS645A 74ALS645A-1
SOT146-1 SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0 - A7, B0 - B7 OE T/R A0 - A7 B0 - B7 A0 - A7 B0 - B7 DESCRIPTION Data inputs Output Enable input (active-Low) Transmit/receive input A port outputs B port outputs A port outputs (-1 version) B port outputs (-1 version) 74ALS (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 750/240 750/240 750/480 750/480 LOAD VALUE HIGH/LOW 20A/0.1mA 20A/0.1mA 20A/0.1mA 15mA/24mA 15mA/24mA 15mA/48mA 15mA/48mA
NOTE: One (1.0) ALS unit load is defined as: 20A in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
19 G3 3EN1 [BA] 1 3EN2 [AB]
2
3
4
5
6
7
8
9
A0 19 1 OE T/R B0
A1
A2
A3
A4
A5
A6
A7 2 3 4
1 2 18 17 16 15 14 13 12 11
B1
B2
B3
B4
B5
B6
B7 5 6 7
18 VCC = Pin 20 GND = Pin 10
17
16
15
14
13
12
11 8 9
SF00199
SC00097
1991 Jun 03
2
853-0597 02709
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
LOGIC DIAGRAM
A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9
OE
19 1 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
T/R VCC = Pin 20 GND = Pin 10
SF00201
FUNCTION TABLE
INPUTS OE L L H H L X Z = = = = T/R L H X OUTPUTS Bus B data to Bus A Bus A data to Bus B Z
High voltage level 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 VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state Operating free-air temperature range Storage temperature range All versions -1 version PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 48 96 0 to +70 -65 to +150 UNIT V V mA V mA mA C C
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VIH VIL IIK IOH IO OL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level Low level output current Operating free-air temperature range All versions -1 version 0 LIMITS PARAMETER MIN 4.5 2.0 0.8 -18 -15 24 48 1 +70 NOM 5.0 MAX 5.5 UNIT V V V mA mA mA mA C
NOTES: 1. The 48mA limit applies only under the condition of VCC = 5.0V 5%.
1991 Jun 03
3
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 VCC10%, VIL = MAX, , , VIH = MIN VCC = MIN, VIL = MAX, VIH = MIN All versions VOL Low-level out ut voltage Low level output -1 version VIK II IIH IIL IO ICC Input clamp voltage Input current at maximum input voltage High-level input current3 Low-level input Output current4 ICCH Supply current (total) ICCL ICCZ VCC = MAX current3 OE or T/R A or B ports VCC = MIN, VIL = MAX, , , VIH = MIN VCC = 4.75V, VIL = MAX, VIH = MIN VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 5.5V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.4V VCC = MAX, VO = 2.25V -30 28 40 44 IOH = -0.4mA IOH = -3mA IOH = -15mA IOL = 12mA IOL = 24mA IOL = 48mA LIMITS MIN VCC - 2 2.4 2.0 0.25 0.35 0.35 -0.73 0.40 0.50 0.50 -1.5 0.1 0.1 20 -0.1 -112 45 55 58 3.2 TYP2 MAX UNIT V V V V V V V mA mA A mA mA mA mA mA
VOH
High level output High-level out ut voltage
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 VCC = 5V, Tamb = 25C. 3. For I/O ports, the parameter IIH and IIL include the off-state current. 4. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = 0C to +70C VCC = +5.0V 10% CL = 50pF, RL = 500 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay An to Bn, Bn to An Output enable time to High or Low level Output disable time from High or Low level Waveform 1 Waveform 2 Waveform 3 Waveform 2 Waveform 3 2.0 2.0 3.0 3.0 2.0 4.0 MAX 10.0 10.0 20.0 20.0 10.0 15.0 ns ns ns UNIT
1991 Jun 03
4
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
AC WAVEFORMS
For all waveforms, VM = 1.3V.
An, Bn
VM tPLH
VM tPHL VM VM
Bn, An
SC00096
Waveform 1. Propagation Delay for Non-inverting Outputs
OE
VM tPZH
VM tPHZ VM 0V VOH -0.3V
OE
VM tPZL
VM tPLZ 3.5V VM VOL +0.3V
An, Bn
An, Bn
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
VCC 7.0V NEGATIVE PULSE 90% VM 10% tTHL (tff) CL RL tw VM 10% tTLH (tr ) 0.3V 90% AMP (V)
VIN PULSE GENERATOR RT D.U.T.
VOUT
RL
tTLH (tr ) 90%
tTHL (tf ) AMP (V) 90% VM tw 10% 0.3V
Test Circuit for 3-State Outputs SWITCH POSITION TEST SWITCH closed tPLZ, tPZL All other open
POSITIVE PULSE 10%
VM
Input Pulse Definition INPUT PULSE REQUIREMENTS Family Amplitude VM 74ALS 3.5V 1.3V Rep.Rate 1MHz tw 500ns tTLH 2.0ns tTHL 2.0ns
DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RT = Termination resistance should be equal to ZOUT of pulse generators.
SC00072
1991 Jun 03
5
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1991 Jun 03
6
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
1991 Jun 03
7
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-1
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. 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. 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.
Production
[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. Right to make changes -- Philips Semiconductors reserves 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. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 05-96 9397-750-03308
Philips Semiconductors
1991 Jun 03 8

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