INTEGRATED CIRCUITS 74HCT1284 Parallel printer interface transceiver/buffer Product specification Supersedes data of 1995 Jun 27 IC06 Data Handbook 1998 Jul 10 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer FEATURES 74HCT1284 DESCRIPTION • Asynchronous operation • 4-Bit transceivers • 3 additional buffer/driver lines • TTL compatible inputs • ESD protection exceeds 2000V per MIL STD 883 Method 3015 The 74HCT1284 parallel interface chip is designed to provide an asynchronous, 4-bit, bi-directional, parallel printer interface for personal computers. Three additional lines are included to provide handshaking signals between the host and the peripheral. The part is designed to match IEEE 1284 standard. The 4 transceiver pins (A/B 1-4) allow data transmission from the A bus to the B bus, or from the B bus to the A bus, depending on the state of the direction pin DIR. and 200V per Machine Model • Input Hysteresis • Low Noise Operation • Center Pin VCC & GND • IEEE 1284 Compliant Level 1 & 2 • Overvoltage Protection on B side The B bus and the Y5-Y7 lines have totem pole or open drain style outputs depending on the state of the high drive enable pin HD. The A bus only has totem pole style outputs. All inputs are TTL compatible with at least 400mV of input hysteresis at VCC = 5.0V. QUICK REFERENCE DATA SYMBOL PARAMETER tPLH tPHL Propagation delay Bn to An CIN Input capacitance An, DIR, HD COUT ICC Output capacitance Bn, Yn CONDITIONS Tamb = 25°C; GND = 0V TYPICAL UNIT CL = 50pF; VCC = 5V 5.3 5.6 ns ns VI = 0V or VCC 5 pF VO = 0V or VCC; 3-State 14 pF VCC = 5.5V 500 nA Total supply current ORDERING INFORMATION PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER 20-pin plastic DIP 0°C to +70°C 74HCT1284N SOT146-1 20-pin plastic SOL 0°C to +70°C 7HCT1284D SOT163-1 20-pin plastic SSOP Type II 0°C to +70°C 74HCT1284DB SOT339-1 20-pin plastic TSSOP Type I 0°C to +70°C 74HCT1284PW SOT360-1 PIN CONFIGURATION PIN DESCRIPTION PIN NUMBER SYMBOL 1,2,3,4 20,19,18,17 A1 - A4 B1 - B4 Data inputs/outputs 7,8,9 14,13,12 A5 - A7 Y5 - Y7 Buffer/Driver lines 10,11 DIR,HIGH DRIVE 14 Y5 5,6 GND Ground (0V) 13 Y6 15,16 VCC Positive supply voltage A1 1 20 B1 A2 2 19 B2 A3 3 18 B3 A4 4 17 B4 GND 5 16 VCC GND 6 15 VCC A5 7 A6 8 A7 9 12 Y7 DIR 10 FUNCTION Direction, Drive 11 HD SK00001 1998 Jul 10 2 853–1768 19693 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer LOGIC SYMBOL 74HCT1284 FUNCTION TABLE INPUTS A A1 A2 A B1 B A A OUTPUTS INPUTS/OUTPUTS DIR HD A5-7 Y5-7 A1-4 B1-4 L L L L A=B Inputs L L H Z A=B Inputs L H L L A=B Inputs L H H H A=B Inputs H L L L Inputs Low Outputs Low H L H Z Inputs High Outputs Z H H L L Inputs B=A H H H H Inputs B=A B2 A3 A4 B B B3 B B4 A5 A6 A7 A Y A Y A Y Y5 Y6 H = High Voltage L = Low Voltage Z = High Impedance, Off-State Y7 DIR HD SK00009 ABSOLUTE MAXIMUM RATINGS1, 2 SYMBOL VCC IIK PARAMETER DC input diode current RATING UNIT –0.5 to +6.5 V ±20 mA –2 to +7.0 V VO < 0 ±50 mA Output in Off or High state –0.5 to +5.5 V VI < 0 voltage3 VI DC input IOK DC output diode current voltage3 VOUT DC output IOUT DC output current Tstg Storage temperature range ICC/IGND CONDITIONS DC supply voltage ±50 mA –65 to 150 °C ±200 mA Output in Low state Continuous current through VCC or GND NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C. 3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL VCC PARAMETER UNIT DC supply voltage MIN MAX 4.7 5.5 V 0 VCC V VI Input voltage VIH High-level input voltage VIL Low-level Input voltage 0.8 V IOH High-level output current –14 mA IOL Low-level output current 14 mA +70 °C Tamb 1998 Jul 10 2.0 Operating free-air temperature range 0 3 V Philips Semiconductors Product specification Parallel printer interface transceiver/buffer 74HCT1284 DC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL VOH PARAMETER An High-level out ut voltage output Bn or Yn VOL An Low-level output voltage Tamb = 25°C TEST CONDITIONS Bn or Yn Tamb = 0°C to +70°C MIN TYP VCC–0.2 VCC VCC–0.2 V VCC = 4.7V; IOH = –4mA 4.3 4.6 3.7 V VCC = 4.7V; IOH = –14mA 2.6 2.9 2.4 V VCC = Min to Max; IOH = –50µA VCC = Min to Max; IOL = 50µA; VI = VIL or VIH MAX MIN UNIT MAX 0 0.2 0.2 V VCC = 4.7V; IOL = 4mA; VI = VIL or VIH 0.1 0.25 0.4 V VCC = 4.7V; IOL = 14mA; VI = VIL or VIH 0.15 0.3 0.4 V VHYS Input Hysteresis VCC = 5.0V 0.4 0.50 RD B/Y side Output Impedance See Figure 1 Input leakage current (A5–A7) VCC = 5.5V; VO = VCC or GND IOFF B/Y Side Power-off leakage current IOZH 0.4 8 15 22 ±0.5 VCC = 0.0V; VO = 0 to 7V 3-State output High current Yn IOZL V 22 Ω ±1.0 ±5.0 µA ±1 ±10 ±100 µA VCC = 5.5V; VO = VCC; VI = VIL or VIH 1 5 20 µA 3-State output Low current Yn VCC = 5.5V; VO = GND; VI = VIL or VIH –1 –5 –20 µA IIH+IOZH current (A1 – A4, Bn) VCC = 5.5V; VI/O = VCC 1 5 25 µA IIL+IOZL current (A1 VCC = 5.5V; VI/O = GND –1 –5 –25 µA VCC = 5.5V; IO = 0; VI = GND or VCC 0.5 250 400 µA II ICC 1998 Jul 10 – A4, Bn) Quiescent Supply Current 4 8 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer 74HCT1284 AC CHARACTERISTICS GND = 0V, tR = tF = 3.0ns, CL = 50pF, RL = 500Ω LIMITS SYMBOL PARAMETER Tamb = 25°C VCC = 5.0V WAVEFORM Tamb = 0 to + 70°C VCC = Min to Max UNIT MIN TYP MAX MIN MAX 0.05 0.11 0.4 0.05 0.4 V/ns SR B-Side Slew Rate tPLH tPHL Propagation delay A toY or A to B 2 5.0 5.0 13.9 21.0 17.1 25.7 5.0 5.0 22 31 ns tPLH tPHL Propagation delay B to A 1 1.5 1.5 5.3 5.6 7.5 7.9 1.5 1.5 9.0 10.0 ns tPZH tPHZ Output enable/disable time to/from High level HD to Y or HD to B 3 4.0 2.0 12.0 6.5 16.0 9.1 4.0 2.0 20.0 11.0 ns tPZL tPLZ Output enable/disable time to/from Low level A to Y or A to B 4 5.0 1.5 12.7 5.0 16.3 7.1 5.0 1.5 20.0 9.0 ns AC WAVEFORMS For all waveforms, VM = 1.5V. Bn Input VM VM tPLH An Input tPHL VM VM tPLH tPHL VOH A1 – A4 Output 50% VCC VOH Bn or Yn Output 50% VCC VOL VOL SK00003 SK00004 Waveform 1. Propagation Delay for Bn to A1–A4 HD Inputs VM Waveform 2. Propagation Delay for An to Bn or Yn Outputs An Input VM tPZH VOH–1.4V VOH–1.4V tPHZ VM VM tPLZ tPZL VOH Bn or Yn Output VM VOH–0.3V Bn or Yn Output 0V VOL +0.3V VOL SK00005 SK00006 Waveform 4. 3-State Output enable Time to Low Level and Output disable Time from Low Level Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level 1998 Jul 10 VM 5 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer 74HCT1284 TEST CIRCUITS AND WAVEFORM VCC IO VOH/2 D.U.T VOH is the voltage when 10µA is drawn from the high output. IO is measured by forcing VOH/2 on the output. RD can then be calculated using the equation RD = |VOH/2IO| . SK00007 Figure 1. Output Impedance RD SWITCH POSITION Bn or Yn Outputs VCC VIN VOUT D.U.T PULSE GENERATOR 50pF TEST SWITCH VCC tPLH GND tPHL VCC GND tPZH GND tPHZ GND tPZL VCC tPLZ VCC S1 35W RT 62W Test Circuit for Bn or Yn Outputs VCC tW 90% NEGATIVE PULSE VOUT VIN PULSE GENERATOR AMP (V) 90% VM VM 10% 10% 0V D.U.T tTHL (tf) RT CL tTLH (tr) RL tTLH (tr) tTHL (tf) 90% POSITIVE PULSE Test Circuit for An Outputs AMP (V) 90% VM VM 10% 10% tW 0V VM = 1.5V Input Pulse Definition DEFINITIONS RL = Load resistor; see AC CHARACTERISTICS for value. INPUT PULSE REQUIREMENTS FAMILY CL = Load capacitance includes jig and probe capacitance; see AC CHARACTERISTICS for value. RT = Termination resistance should be equal to ZOUT of pulse generators. 74HCT Amplitude Rep. Rate tW tr tf 3.0V 1MHz 500ns 3ns 3ns SK00008 1998 Jul 10 6 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer DIP20: plastic dual in-line package; 20 leads (300 mil) 1998 Jul 10 7 74HCT1284 SOT146-1 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer SO20: plastic small outline package; 20 leads; body width 7.5 mm 1998 Jul 10 8 74HCT1284 SOT163-1 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm 1998 Jul 10 9 74HCT1284 SOT339-1 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm 1998 Jul 10 10 74HCT1284 SOT360-1 Philips Semiconductors Product specification Parallel printer interface transceiver/buffer NOTES 1998 Jul 10 11 74HCT1284 Philips Semiconductors Product specification 74HCT1284 Parallel printer interface transceiver/buffer Data sheet status Data sheet status Product status Definition [1] 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 changes 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. 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. Copyright Philips Electronics North America Corporation 1998 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 Date of release: 07-99 Document order number: 1998 Jul 10 12 9397 750 06245