INTEGRATED CIRCUITS 74ALS245A/74ALS245A–1 Octal transceiver (3–State) Product specification IC05 Data Handbook 1991 Jun 03 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 • Outputs are placed in high impedance state during power-off 20 VCC T/R 1 conditions • The -1 version sinks 48mA DESCRIPTION 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. A0 2 19 OE A1 3 18 B0 A2 4 17 B1 A3 5 16 B2 A4 6 15 B3 A5 7 14 B4 A6 8 13 B5 A7 9 12 B6 GND 10 11 B7 The 74ALS245A-1 is the same as the 74ALS245A except that both ports sink 48mA within the ±5% VCC range. TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74ALS245A 7.0ns 34mA 74ALS245A-1 7.0ns 34mA TYPE SF00198 ORDERING INFORMATION ORDER CODE COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DESCRIPTION DRAWING NUMBER 20-pin plastic DIP 74ALS245AN, 74ALS245A-1N SOT146-1 20-pin plastic SOL 74ALS245AD, 744ALS245A-1D SOT163-1 20-pin plastic SSOP Type II 74ALS245ADB, 74ALS245A-1DB SOT339-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS A0 – A7, B0 – B7 DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Data inputs 1.0/1.0 20µA/0.1mA OE Output Enable input (active-Low) 1.0/1.0 20µA/0.1mA T/R Transmit/receive input 1.0/1.0 20µA/0.1mA A0 – A7 A port outputs 750/240 15mA/24mA B0 – B7 B port outputs 750/240 15mA/24mA A0 – A7 A port outputs (-1 version) 750/480 15mA/48mA B0 – B7 B port outputs (-1 version) 750/480 15mA/48mA NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state. 1991 Jun 03 2 853–0011 02709 Philips Semiconductors Product specification Octal transceiver (3-State) 74ALS245A/74ALS245A-1 LOGIC SYMBOL IEC/IEEE SYMBOL 19 2 3 4 5 6 7 8 9 G3 3EN1 [BA] 1 A0 19 A1 A2 A3 A4 A5 A6 ∇1 A7 2 OE 1 3EN2 [AB] T/R B0 18 B1 17 B2 16 B3 B4 15 14 B5 13 B6 12 18 2∇ 3 17 4 16 5 15 6 14 7 13 8 12 9 11 B7 11 VCC = Pin 20 GND = Pin 10 SC00097 SF00199 LOGIC DIAGRAM OE T/R A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7 19 1 VCC = Pin 20 GND = Pin 10 SF00201 FUNCTION TABLE INPUTS H L X Z = = = = OUTPUTS OE T/R L L Bus B data to Bus A L H Bus A data to Bus B H X Z High voltage level Low voltage level Don’t care High impedance “off” state 1991 Jun 03 3 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.) PARAMETER SYMBOL RATING UNIT V VCC Supply voltage –0.5 to +7.0 VIN Input voltage –0.5 to +7.0 V IIN Input current –30 to +5 mA VOUT Voltage applied to output in High output state IOUT O Current applied to output in Low output state Tamb Operating free-air temperature range Tstg Storage temperature range All versions -1 version –0.5 to VCC V 48 mA 96 mA 0 to +70 °C –65 to +150 °C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER MIN NOM MAX 5.0 5.5 UNIT VCC Supply voltage 4.5 VIH High-level input voltage 2.0 VIL Low-level input voltage 0.8 V IIK Input clamp current –18 mA IOH High-level output current IOL O Tamb Low level output current Low-level Operating free-air temperature range 1991 Jun 03 4 V –15 mA All versions 24 mA -1 version 481 mA +70 °C 0 NOTES: 1. The 48mA limit applies only under the condition of VCC = 5.0V ± 5%. V Philips Semiconductors Product specification Octal transceiver (3-State) 74ALS245A/74ALS245A-1 DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL VOH TEST CONDITIONS1 PARAMETER VCC±10%,, VIL = MAX,, VIH = MIN High-level High level out output ut voltage VCC = MIN, VIL = MAX, VIH = MIN All versions VOL Low-level output Low level out ut voltage -1 version VIK Input clamp voltage VCC = MIN,, VIL = MAX,, VIH = MIN VCC = 4.75V, VIL = MAX, VIH = MIN LIMITS MIN IOH = –0.4mA VCC – 2 IOH = –3mA 2.4 IOH = –15mA 2.0 TYP2 MAX UNIT V 3.2 V V IOL = 12mA 0.25 0.40 V IOL = 24mA 0.35 0.50 V IOL = 48mA 0.35 0.50 V –0.73 –1.5 V OE or T/R VCC = MIN, II = IIK VCC = MAX, VI = 7.0V 0.1 mA A or B ports II Input current at maximum input voltage VCC = MAX, VI = 5.5V 0.1 mA IIH High-level input current3 VCC = MAX, VI = 2.7V 20 µA IIL Low-level input current3 VCC = MAX, VI = 0.4V IO Output current4 VCC = MAX, VO = 2.25V ICCH ICC ICCL Supply current (total) –0.1 mA –112 mA 28 45 mA 40 55 mA 44 58 mA –30 VCC = MAX ICCZ 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 = 25°C. 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 = 0°C to +70°C VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω MIN MAX UNIT tPLH tPHL Propagation delay An to Bn, Bn to An Waveform 1 2.0 2.0 10.0 10.0 ns tPZH tPZL Output enable time to High or Low level Waveform 2 Waveform 3 3.0 3.0 20.0 20.0 ns tPHZ tPLZ Output disable time from High or Low level Waveform 2 Waveform 3 2.0 4.0 10.0 15.0 ns 1991 Jun 03 5 Philips Semiconductors Product specification Octal transceiver (3-State) 74ALS245A/74ALS245A-1 AC WAVEFORMS For all waveforms, VM = 1.3V. An, Bn VM OE VM tPLH VM tPHL VM tPZL tPLZ 3.5V VM Bn, An An, Bn VM VM VOL +0.3V SC00096 SC00095 Waveform 1. Propagation Delay for Non-inverting Outputs OE VM Waveform 3. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level VM tPZH An, Bn VOH -0.3V tPHZ VM 0V SC00094 Waveform 2. 3-State Output Enable Time to High Level and Output Disable Time from High Level TEST CIRCUIT AND WAVEFORMS VCC 7.0V VIN VOUT PULSE GENERATOR tw 90% NEGATIVE PULSE 10% RL CL RL AMP (V) VM VM D.U.T. RT 90% 10% tTHL (tff) tTLH (tr ) tTLH (tr ) tTHL (tf ) 0.3V AMP (V) 90% Test Circuit for 3-State Outputs POSITIVE PULSE VM VM 10% 10% tw SWITCH POSITION TEST SWITCH closed tPLZ, tPZL All other 90% 0.3V Input Pulse Definition open INPUT PULSE REQUIREMENTS Family Amplitude VM 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. 74ALS 3.5V 1.3V Rep.Rate tw tTLH tTHL 1MHz 500ns 2.0ns 2.0ns SC00072 1991 Jun 03 6 Philips Semiconductors Product specification Octal transceiver (3–State) 74ALS245A/74ALS245A–1 DIP20: plastic dual in-line package; 20 leads (300 mil) 1991 Jun 03 7 SOT146-1 Philips Semiconductors Product specification Octal transceiver (3–State) 74ALS245A/74ALS245A–1 SO20: plastic small outline package; 20 leads; body width 7.5 mm 1991 Jun 03 8 SOT163-1 Philips Semiconductors Product specification Octal transceiver (3–State) 74ALS245A/74ALS245A–1 SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm 1991 Jun 03 9 SOT339-1 Philips Semiconductors Product specification Octal transceiver (3–State) 74ALS245A/74ALS245A–1 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product 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. Product Specification Full 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. 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. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected 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. Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 1991 Jun 03 10