INTEGRATED CIRCUITS 74LVT646 3.3V Octal bus transceiver/register (3-State) Product specification Supersedes data of 1994 May 20 IC23 Data Handbook 1998 Feb 19 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) FEATURES 74LVT646 DESCRIPTION • Combines 74LVT245 and 74LVT574 type functions in one device • Independent registers for A and B buses • Multiplexed real–time and stored data • Output capability: +64mA/–32mA • TTL input and output switching levels • Input and output interface capability to systems at 5V supply • Bus-hold data inputs eliminate the need for external pull-up The LVT646 is a high-performance BiCMOS product designed for VCC operation at 3.3V. This device consists of bus transceiver circuits with 3-State outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes High. Output Enable (OE) and DIR pins are provided to control the transceiver function. In the transceiver mode, data present at the high impedance port may be stored in either the A or B register or both. The Select (SAB, SBA) pins determine whether data is stored or transferred through the device in real–time. The DIR determines which bus will receive data when the OE is active (Low). In the isolation mode (OE = High), data from Bus A may be stored in the B register and/or data from Bus B may be stored in the A register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses, A or B may be driven at a time. The examples on the next page demonstrate the four fundamental bus management functions that can be performed with the 74LVT646. resistors to hold unused inputs • Live insertion/extraction permitted • No bus current loading when output is tied to 5V bus • Latch-up protection exceeds 500mA per JEDEC Std 17 • Power-up 3-State • Power-up reset • ESD protection exceeds 2000V per MIL STD 883 Method 3015 and 200V per Machine Model QUICK REFERENCE DATA SYMBOL CONDITIONS Tamb = 25°C; GND = 0V PARAMETER tPLH tPHL Propagation delay An to Bn or Bn to An CL = 50pF; VCC = 3.3V CIN Input capacitance CP, S, OE, DIR VI/O = 0V or 3.0V CI/O I/O capacitance Outputs disabled; VI/O = 0V or 3.0V ICCZ Total supply current Outputs disabled; VCC = 3.6V TYPICAL UNIT 2.8 2.7 ns 4 pF 10 pF 0.13 mA ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER 24-Pin Plastic SOL –40°C to +85°C 74LVT646 D 74LVT646 D SOT163-1 24-Pin Plastic SSOP Type II –40°C to +85°C 74LVT646 DB 74LVT646 DB SOT399-1 24-Pin Plastic TSSOP Type I –40°C to +85°C 74LVT646 PW 74LVT646PW DH SOT360-1 PIN CONFIGURATION PIN DESCRIPTION PIN NUMBER SYMBOL 1, 23 CPAB / CPBA 2, 22 SAB / SBA FUNCTION A to B clock input / B to A clock input CPAB 1 24 VCC SAB 2 23 CPBA DIR 3 22 SBA A0 4 21 OE 3 DIR Direction control input A1 5 20 B0 6 19 A0 – A7 A2 B1 4, 5, 6, 7, 8, 9, 10, 11 Data inputs/outputs (A side) A3 7 18 B2 8 17 B3 20, 19, 18, 17, 16, 15, 14, 13 B0 – B7 A4 Data inputs/outputs (B side) A5 9 16 B4 21 OE A6 10 15 B5 12 GND Ground (0V) A7 11 14 B6 GND 12 13 B7 24 VCC Positive supply voltage A to B select input / B to A select input Output enable input (active-low) SV00045 1998 Feb 19 2 853-1747 18987 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) LOGIC SYMBOL 74LVT646 LOGIC SYMBOL (IEEE/IEC) 21 G3 3EN1 [BA] 3 23 4 5 6 7 8 9 22 10 11 3EN2 [AB] C4 G5 1 C6 2 G7 4 ≥1 ∇1 A0 A1 A2 A3 A4 A5 A6 A7 1 CPAB 2 SAB 3 DIR 6D 7 23 CPBA 1 7 22 SBA 21 OE 5 4D 5 1 20 ≥1 2∇ B0 B1 B2 B3 B4 B5 B6 B7 5 19 6 18 7 17 8 16 9 15 10 14 20 19 18 17 16 15 14 13 SV00046 11 13 SV00047 LOGIC DIAGRAM OE DIR CPBA SBA CPAB 21 3 23 22 1 2 SAB 1of 8 Channels 1D C1 Q A0 4 20 B0 1D C1 Q 5 A1 A2 6 A3 A4 7 8 A5 9 DETAIL A X 7 A6 10 A7 11 19 18 B1 17 B3 16 B4 15 14 B5 13 B7 B2 B6 SV00048 1998 Feb 19 3 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) REAL TIME BUS TRANSFER BUS B TO BUS A A B REAL TIME BUS TRANSFER BUS A TO BUS B A X B X L OE L DIR CPAB CPBA SAB SBA H X A B X L OE X } X TRANSFER STORED DATA TO A OR B } DIR CPAB CPBA SAB SBA L A } L STORAGE FROM A, B, OR A AND B B } OE 74LVT646 DIR CPAB CPBA SAB SBA OE DIR CPAB CPBA SAB SBA L H ↑ X X X L L X H or L X L L X ↑ X X L H H or L X H H X ↑ ↑ X X H X SV00049 FUNCTION TABLE INPUTS OPERATING MODE OE DIR CPAB CPBA SAB SBA An Bn X X ↑ X X X Input Unspecified output* Store A, B unspecified X X X ↑ X X Unspecified output* Input Store B, A unspecified H H X X ↑ H or L ↑ H or L X X X X Input Input Store A and B data Isolation, hold storage L L L L X X X H or L X X L H Output Input Real time B data to A bus Stored B data to A bus L L H L X ↑ * DATA I/O = = = = H X X L X Real time A data to B bus Input Output H H or L X H X Stored A data to B bus High voltage level Low voltage level Don’t care Low-to-High clock transition The data output function may be enabled or disabled by various signals at the OE input. Data input functions are always enabled, i.e., data at the bus pins will be stored on every Low-to-High transition of the clock. 1998 Feb 19 4 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) 74LVT646 ABSOLUTE MAXIMUM RATINGS1, 2 PARAMETER SYMBOL VCC CONDITIONS RATING UNIT –0.5 to +4.6 V –50 mA –0.5 to +7.0 V VO < 0 –50 mA Output in Off or High state –0.5 to +7.0 V Output in Low state 128 Output in High state –64 DC supply voltage IIK DC input diode current VI DC input voltage3 IOK DC output diode current VOUT DC output voltage3 IOUT O DC output current Tstg Storage temperature range VI < 0 mA –65 to 150 °C 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 negative voltage ratings may be exceeded if the input and output clamp current ratings are observed. RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL VCC PARAMETER UNIT DC supply voltage MIN MAX 2.7 3.6 V 0 5.5 V VI Input voltage VIH High-level input voltage VIL Input voltage 0.8 V IOH High-level output current –32 mA Low-level output current 32 Low-level output current; current duty cycle ≤ 50%, f ≥ 1kHz 64 ∆t/∆v Input transition rise or fall rate; Outputs enabled 10 ns/V Tamb Operating free-air temperature range +85 °C IOL O 1998 Feb 19 2.0 mA –40 5 V Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) 74LVT646 DC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40°C to +85°C MIN VIK Input clamp voltage VCC = 2.7V; IIK = –18mA VCC = 2.7 to 3.6V; IOH = –100µA VOH VOL VRST High-level output voltage Low–level output voltage Power-up output low voltage5 IHOLD IEX IPU/PD Output off current Bus Hold current A inputs6 2.4 2.5 VCC = 3.0V; IOH = –32mA 2.0 2.2 0.1 0.2 VCC = 2.7V; IOL = 24mA 0.3 0.5 VCC = 3.0V; IOL = 16mA 0.25 0.4 VCC = 3.0V; IOL = 32mA 0.3 0.5 VCC = 3.0V; IOL = 64mA 0.4 0.55 VCC = 3.6V; IO = 1mA; VI = GND or VCC 0.13 0.55 ±0.1 ±1 1 10 1 20 0.1 1 VCC = 3.6V; VI = 0 –1 -5 VCC = 0V; VI or VO = 0 to 4.5V 1 ±100 VCC = 3.6V; VI = 5.5V I/O Data pins4 VCC = 3V; VI = 0.8V 75 150 VCC = 3V; VI = 2.0V –75 –150 VCC = 0V to 3.6V; VCC = 3.6V ±500 V V µA µA µA VO = 5.5V; VCC = 3.0V 60 125 µA Power up/down 3-State output current3 VCC ≤ 1.2V; VO = 0.5V to VCC; VI = GND or VCC; OE/OE =Don’t care 15 ±100 µA VCC = 3.6V; Outputs High, VI = GND or VCC, IO = 0 0.13 0.19 VCC = 3.6V; Outputs Low, VI = GND or VCC, IO = 0 3 12 VCC = 3.6V; Outputs Disabled; VI = GND or VCC, IO = 0 0.13 0.19 VCC = 3V to 3.6V; One input at VCC-0.6V, Other inputs at VCC or GND 0.1 0.2 Quiescent supply current ICCZ ∆ICC V VCC = 2.7V; IOL = 100µA Control pins V Current into an output in the High state when VO > VCC ICCH ICCL –1.2 VCC = 2.7V; IOH = –8mA VCC = 3.6V; VI = VCC IOFF –0.9 VCC-0.1 VCC = 0 or 3.6V; VI = 5.5V Input leakage current MAX VCC-0.2 VCC = 3.6V; VI = VCC or GND II TYP NO TAG UNIT Additional supply current per input pin2 mA mA NOTES: 1. All typical values are at and Tamb = 25°C. 2. This is the increase in supply current for each input at the specified voltage level other than VCC or GND 3. This parameter is valid for any VCC between 0V and 1.2V with a transition time of up to 10msec. From VCC = 1.2V to VCC = 3.3V ± 0.3V a transition time of 100µsec is permitted. This parameter is valid for Tamb = 25°C only. 4. Unused pins at VCC or GND. 5. For valid test results, data must not be loaded into the flip-flops (or latches) after applying power. 6. This is the bus hold overdrive current required to force the input to the opposite logic state. 1998 Feb 19 6 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) 74LVT646 AC CHARACTERISTICS GND = 0V, tR = tF = 2.5ns, CL = 50pF, RL = 500Ω; Tamb = –40°C to +85°C. LIMITS SYMBOL PARAMETER VCC = 3.3V ± 0.3V VCC = 2.7V MIN TYP1 MAX MAX WAVEFORM UNIT fMAX Maximum clock frequency 1 150 180 tPLH tPHL Propagation delay CPAB to Bn or CPBA to An 1 1.8 2.1 3.8 3.8 5.7 5.7 6.7 6.4 ns tPLH tPHL Propagation delay An to Bn or Bn to An 2 1.3 1.0 2.8 2.7 4.7 4.6 5.4 5.3 ns tPLH tPHL Propagation delay SAB to Bn or SBA to An 2 3 1.4 1.4 3.7 3.8 6.2 6.2 7.2 6.8 ns tPZH tPZL Output enable time OE to An or Bn 5 6 1.0 1.0 4.0 4.1 5.8 6.0 7.2 7.3 ns tPHZ tPLZ Output disable time OE to An or Bn 5 6 2.3 2.2 4.3 3.8 6.5 5.8 6.9 5.9 ns tPZH tPZL Output enable time DIR to An or Bn 5 6 1.0 1.2 3.4 3.4 6.5 6.3 7.5 7.1 ns 5 6 1.7 1.5 4.1 3.5 7.2 5.8 8.1 6.3 ns tPHZ Output disable time tPLZ DIR to An or Bn NOTE: 1. All typical values are at VCC = 3.3V and Tamb = 25°C. MHz AC SETUP REQUIREMENTS GND = 0V, tR =2.5ns, tF = 2.5ns, CL = 50pF, RL = 500Ω; Tamb = –40°C to +85°C LIMITS SYMBOL PARAMETER WAVEFORM VCC = 3.3V± 0.3V VCC = 2.7V Min Typ Min UNIT ts(H) ts(L) Setup time1 An to CPAB, Bn to CPBA 4 1.5 2.0 1.0 1.0 1.6 2.4 ns th(H) th(L) Hold time1 An to CPAB, Bn to CPBA 4 0.0 0.0 –1.0 –1.0 0.0 0.0 ns 1 3.3 3.3 1.0 2.0 3.3 3.3 ns tw(H) Pulse width, High or Low tw(L) CPAB or CPBA NOTE: 1. This data sheet limit may vary among suppliers. 1998 Feb 19 7 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) 74LVT646 AC WAVEFORMS VM = 1.5V, VIN = GND to 2.7V An or Bn 2.7V CPBA or CPAB 1.5V 1.5V 1.5V tPLH 1.5V An or Bn 1.5V 1.5V 0V tw(L) tPHL 1.5V 1.5V ts(H) 0V tw(H) ÉÉÉ ÉÉÉÉÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉÉÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉÉÉÉÉ ÉÉÉ 2.7V 1/fMAX th(L) 2.7V CPBA or CPAB VOH ts(L) th(H) 1.5V 1.5V 1.5V 0V NOTE: The shaded areas indicate when the input is permitted to change for predictable output performance. VOL SV00050 SV00123 Waveform 4. Data Setup and Hold Times Waveform 1. Propagation Delay, Clock Input to Output, Clock Pulse Width, and Maximum Clock Frequency 2.7V OE, DIR 2.7V SBA or SAB 1.5V VM VM An or Bn tPHL VM 0V tPZH 0V tPLH 1.5V DIR tPHZ VOH VOH VOH –0.3V An or Bn 1.5V VM 0V VOL SV00124 SV00121 Waveform 5. 3-State Output Enable Time to High Level and Output Disable Time from High Level Waveform 2. Propagation Delay, SAB to Bn or SBA to An, An to Bn or Bn to An 2.7V OE, DIR 2.7V 1.5V SBA or SAB 1.5V 1.5V 0V tPHL An or Bn tPLH 1.5V 1.5V 0V DIR tPZL tPLZ 3V VOH An or Bn 1.5V 1.5V VOL +0.3V VOL VOL SV00125 SV00122 Waveform 6. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level Waveform 3. Propagation Delay, SBA to An or SAB to Bn 1998 Feb 19 8 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) 74LVT646 TEST CIRCUIT AND WAVEFORM 6.0V VCC Open VIN VOUT PULSE GENERATOR RL GND tW 90% NEGATIVE PULSE 90% VM VM 10% 10% D.U.T. RT 0V CL tTHL (tF) RL tTLH (tR) tTLH (tR) tTHL (tF) 90% Test Circuit for 3-State Outputs POSITIVE PULSE AMP (V) 90% VM VM 10% 10% tW SWITCH POSITION TEST SWITCH tPLH/tPHL Open tPLZ/tPZL 6V tPHZ/tPZH GND AMP (V) 0V VM = 1.5V Input Pulse Definition INPUT PULSE REQUIREMENTS DEFINITIONS FAMILY RL = Load resistor; see AC CHARACTERISTICS for value. CL = Load capacitance includes jig and probe capacitance; see AC CHARACTERISTICS for value. 74LVT Amplitude Rep. Rate 2.7V 10MHz tW tR tF 500ns 2.5ns 2.5ns RT = Termination resistance should be equal to ZOUT of pulse generators. SV00092 1998 Feb 19 9 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) SO24: plastic small outline package; 24 leads; body width 7.5 mm 1998 Feb 19 10 74LVT646 SOT137-1 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) SSOP24: plastic shrink small outline package; 24 leads; body width 5.3 mm 1998 Feb 19 11 74LVT646 SOT340-1 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm 1998 Feb 19 12 74LVT646 SOT355-1 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) NOTES 1998 Feb 19 13 74LVT646 Philips Semiconductors Product specification 3.3V Octal bus transceiver/register (3-State) 74LVT646 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 14 Date of release: 05-96 9397-750-03544