INTEGRATED CIRCUITS 74LVC245A/74LVCH245A Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) Product specification Supersedes data of 1997 Dec 19 IC24 Data Handbook 1998 May 20 Philips Semiconductors Product specification Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) FEATURES 74LVC245A 74LVCH245A DESCRIPTION • 5-volt tolerant inputs/outputs, for interfacing with 5-volt logic • Supply voltage range of 2.7V to 3.6V • Complies with JEDEC standard no. 8-1A • CMOS low power consumption • Direct interface with TTL levels • High impedance when VCC = 0V • Bushold on all data inputs (74LVCH245A only) The 74LVC245A/74LVCH245A is a high-performance, low-power, low-voltage, Si-gate CMOS device, superior to most advanced CMOS compatible TTL families. Inputs can be driven from either 3.3V or 5V devices. In 3-State operation, outputs can handle 5V. These features allow the use of these devices as translators in a mixed 3.3V/5V environment. The 74LVC245A/74LVCH245A is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both send and receive directions. The ’245’ features an output enable (OE) input for easy cascading and a send/receive (DIR) input for direction control. OE controls the outputs so that the buses are effectively isolated. The ’245’ is functionally identical to the ’640’, but the ’640’ has true (non-inverting) outputs. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS CL = 50pF VCC = 3.3V TYPICAL UNIT 3.6 ns tPHL/tPLH Propagation delay An to Bn; Bn to An CI Input capacitance 5.0 pF CI/O Input/output capacitance 10.0 pF CPD Power dissipation capacitance per buffer 33 pF Notes 1 and 2 NOTE: 1. CPD is used to determine the dynamic power dissipation (PD in W): PD = CPD x VCC2 x fi + (CL x VCC2 x fo) where: fi = input frequency in MHz; CL = output load capacity in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL x VCC2 x fo) = sum of outputs. 2. The condition is VI = GND to VCC ORDERING INFORMATION TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. # 20-Pin Plastic Shrink Small Outline (SO) –40°C to +85°C 74LVC245A D 74LVC245A D SOT163-1 20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVC245A DB 74LVC245A DB SOT339-1 20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVC245A PW 7LVC245APW DH SOT360-1 20-Pin Plastic Shrink Small Outline (SO) –40°C to +85°C 74LVCH245A D 74LVCH245A D SOT163-1 20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVCH245A DB 74LVCH245A DB SOT339-1 20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVCH245A PW LVCH245APW DH SOT360-1 PACKAGES 1998 May 20 2 853-2044 19419 Philips Semiconductors Product specification 74LVC245A 74LVCH245A Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) PIN CONFIGURATION LOGIC SYMBOL 1 DIR DIR 1 20 VCC A0 2 19 OE A1 3 18 B0 A2 4 17 B1 A3 5 16 B2 A0 A4 6 15 B3 A5 7 14 B4 A1 A2 A3 A6 A7 8 13 9 GND 10 19 2 B6 11 B7 A4 A5 PIN DESCRIPTION A7 PIN NUMBER SYMBOL 1 DIR 2, 3, 4, 5, 6, 7, 8, 9 A0 to A7 10 GND 18, 17, 16, 15, 14, 13, 12, 11 B0 to B7 19 OE Output enable input (active-Low) 20 VCC Positive supply voltage 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 5 6 7 8 9 11 B7 SV00016 FUNCTION Direction control LOGIC SYMBOL (IEEE/IEC) Data inputs/outputs Ground (0V) 19 Data inputs/outputs 1 3EN2 (AB) ∇1 FUNCTION TABLE INPUTS G3 3EN1 (BA) 2 H L X Z B0 4 SV00014 A6 18 3 B5 12 OE INPUTS/OUTPUTS 2∇ 18 3 17 4 16 OE DIR An B0 5 15 L L A=B Inputs 6 14 L H lnputs B=A 7 13 H X Z Z 8 12 9 11 = HIGH voltage level = LOW voltage level = Don’t care = High impedance OFF-state 1998 May 20 SV00208 3 Philips Semiconductors Product specification 74LVC245A 74LVCH245A Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL VCC VI VO PARAMETER CONDITIONS UNIT MIN MAX DC supply voltage (for max. speed performance) 2.7 3.6 DC supply voltage (for low-voltage applications) 1.2 3.6 DC Input voltage range 0 5.5 DC Output voltage range; output HIGH or LOW state 0 VCC DC output voltage range; output 3-State 0 5.5 –40 +85 °C 0 0 20 10 ns/V V Tamb Operating ambient temperature range in free-air tr, tf Input rise and fall times VCC = 1.2 to 2.7V VCC = 2.7 to 3.6V V V ABSOLUTE MAXIMUM RATINGS1 In accordance with the Absolute Maximum Rating System (IEC 134) Voltages are referenced to GND (ground = 0V) PARAMETER SYMBOL VCC CONDITIONS UNIT –0.5 to +6.5 V IIK DC input diode current VI 0 –50 mA VI DC input voltage Note 2 –0.5 to +6.5 V IOK DC output diode current VO VCC or VO 0 50 mA DC output voltage; output HIGH or LOW state Note 2 –0.5 to VCC +0.5 DC output voltage; output 3-State Note 2 –0.5 to 6.5 DC output source or sink current VO = 0 to VCC VO IO IGND, ICC Tstg PTOT DC supply voltage RATING DC VCC or GND current Storage temperature range Power dissipation per package – plastic mini-pack (SO) – plastic shrink mini-pack (SSOP and TSSOP) above +70°C derate linearly with 8 mW/K above +60°C derate linearly with 5.5 mW/K V 50 mA 100 mA –65 to +150 °C 500 500 mW 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 input and output voltage ratings may be exceeded if the input and output current ratings are observed. 1998 May 20 4 Philips Semiconductors Product specification 74LVC245A 74LVCH245A Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) DC ELECTRICAL CHARACTERISTICS Over recommended operating conditions voltages are referenced to GND (ground = 0V) LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40°C to +85°C MIN VIH HIGH level Input voltage VIL LOW level Input voltage VOH O VOL II VCC = 1.2V VCC VCC = 2.7 to 3.6V 2.0 TYP1 V VCC = 1.2V GND V VCC = 2.7 to 3.6V HIGH level output voltage LOW level output voltage Input leakage current6 0.8 VCC = 2.7V; VI = VIH or VIL; IO = –12mA VCC0.5 VCC = 3.0V; VI = VIH or VIL; IO = –100µA VCC0.2 VCC = 3.0V; VI = VIH or VIL; IO = –18mA VCC0.6 VCC = 3.0V; VI = VIH or VIL; IO = –24mA VCC0.8 VCC V VCC = 2.7V; VI = VIH or VIL; IO = 12mA 0.40 VCC = 3.0V; VI = VIH or VIL; IO = 100µA 0.20 VCC = 3.0V; VI = VIH or VIL; IO = 24mA 0.55 V 0.1 5 µA VCC = 3.6V; VI = VIH or VIL; VO = 5.5V or GND 0.1 5 µA VCC = 3.6V; VI = 5.5V or GND current6, 7 UNIT MAX IOZ 3-State output OFF-state Ioff Power off leakage supply VCC = 0.0V; VI or VO = 5.5V 0.1 10 µA ICC Quiescent supply current VCC = 3.6V; VI = VCC or GND; IO = 0 0.1 10 µA ∆ICC Additional quiescent supply current per input pin VCC = 2.7V to 3.6V; VI = VCC –0.6V; IO = 0 5 500 µA IBHL Bushold LOW sustaining current2, 3, 4 VCC = 3.0V; VI =0.8V 75 – – µA IBHH Bushold HIGH sustaining current2, 3, 4 VCC = 3.0V; VI =2.0V –75 – – µA IBHLO Bushold LOW overdrive current2, 3, 5 VCC = 3.6V 500 – – µA IBHHO Bushold HIGH overdrive current2, 3, 5 VCC = 3.6V –500 – – µA NOTES: 1. All typical values are at VCC = 3.3V and Tamb = 25°C. 2. Valid for data inputs of bushold parts (LVCH-A) only. 3. For data inputs only, control inputs do not have a bushold circuit. 4. The specified sustaining current at the data input holds the input below the specified VI level. 5. The specified overdrive current at the data input forces the data input to the opposite logic input state. 6. For bushold parts, the bushold circuit is switched off when VI exceeds VCC allowing 5.5V on the input terminal. 7. For I/O ports the parameter IOZ includes the input leakage current. 1998 May 20 5 Philips Semiconductors Product specification 74LVC245A 74LVCH245A Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) AC CHARACTERISTICS GND = 0V; tr = tf v 2.5ns; CL = 50pF; RL = 500Ω; Tamb = –40°C to +85°C. LIMITS SYMBOL PARAMETER WAVEFORM VCC = 3.3V ±0.3V VCC = 2.7V VCC = 1.2V MIN TYP1 MAX MIN MAX TYP UNIT tPHL tPLH Propagation delay An to Bn; Bn to An 1, 3 1.5 3.6 6.3 1.5 7.3 16 ns tPZH tPZL 3-State output enable time OE to An; OE to Bn 2, 3 1.5 5.1 8.5 1.5 9.5 23 ns tPHZ tPLZ 3-State output disable time OE to An; OE to Bn 2, 3 1.5 4.5 7.0 1.5 8.0 16 ns NOTE: 1. Unless otherwise stated, all typical values are at VCC = 3.3V and Tamb = 25°C. AC WAVEFORMS TEST CIRCUIT VM = 1.5V at VCC w 2.7V; VM = 0.5 VCC at VCC t 2.7V. VOL and VOH are the typical output voltage drop that occur with the output load. VX = VOL + 0.3V at VCC w 2.7V; VX = VOL + 0.1 VCC at VCC t 2.7V VY = VOH –0.3V at VCC w 2.7V; VY = VOH – 0.1 VCC at VCC t 2.7V 2<VCC Open GND RL=500 Ω VOUT VIN VI INPUT S1 VCC PULSE GENERATOR D.U.T. VM RT RL=500 Ω CL GND VOH tPHL tPLH Test Circuit for 3-State Outputs OUTPUT SWITCH POSITION VM SY00041 Waveform 1. Input (Dn) to output (Qn) propagation delays. VCC VIN tPLH/tPHL Open tPLZ/tPZL 2<VCC t 2.7V 2.7 – 3.6V VCC 2.7V tPHZ/tPZH GND DEFINITIONS RL = Load resistor CL = Load capacitance includes jig and probe capacitance RT = Termination resistance should be equal to ZOUT of pulse generators. VI nOE INPUT SWITCH TEST VOL VM GND SW00047 tPLZ tPZL Waveform 3. Load circuitry for switching times. VCC Qn OUTPUT LOW-to-OFF OFF-to-LOW VM VX VOL tPHZ tPZH VOH Qn OUTPUT HIGH-to-OFF OFF-to-HIGH VY VM GND outputs enabled outputs disabled outputs enabled SW00207 Waveform 2. 3-State enable and disable times. 1998 May 20 6 Philips Semiconductors Product specification Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) SO20: plastic small outline package; 20 leads; body width 7.5 mm 1998 May 20 7 74LVC245A 74LVCH245A SOT163-1 Philips Semiconductors Product specification Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm 1998 May 20 8 74LVC245A 74LVCH245A SOT339-1 Philips Semiconductors Product specification Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm 1998 May 20 9 74LVC245A 74LVCH245A SOT360-1 Philips Semiconductors Product specification Octal bus transceiver with direction pin with 5-volt tolerant inputs/outputs (3-State) 74LVC245A 74LVCH245A 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 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. 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 print code Document order number: yyyy mmm dd 10 Date of release: 05-96 9397-750-04503