SCBS257 - SEPTEMBER 1987 - REVISED NOVEMBER 1993 * * * * * * * * DW OR NT PACKAGE (TOP VIEW) BiCMOS Process With TTL Inputs and Outputs State-of-the-Art BiCMOS Design Significantly Reduces Standby Current Flow-Through Pinout (All Inputs on Opposite Side From Outputs) Functionally Equivalent to AMD Am29854 High-Speed Bus Transceiver With Parity Generator/ Checker Parity-Error Flag With Open-Collector Output Latch for Storage of the Parity-Error Flag Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (NT) OEA A1 A2 A3 A4 A5 A6 A7 A8 ERR CLR GND 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC B1 B2 B3 B4 B5 B6 B7 B8 PARITY OEB LE description The SN74BCT29854 is an 8-bit to 9-bit parity transceiver designed for asynchronous communication between data buses. When data is transmitted from the A to B bus, a parity bit is generated. When data is transmitted from the B to A bus with its corresponding parity bit, the parity-error (ERR) output will indicate whether or not an error in the B data has occurred. The output-enable (OEA, OEB) inputs can be used to disable the device so that the buses are effectively isolated. A 9-bit parity generator/ checker generates a parity-odd (PARITY) output and monitors the parity of the I/O ports with an open-collector parity-error (ERR) flag. ERR can be either passed, sampled, stored, or cleared from the latch using the latch-enable (LE) and clear (CLR) control inputs. When both OEA and OEB are low, data is transferred from the A bus to the B bus and inverted parity is generated. Inverted parity is a forced error condition which gives the designer more system diagnostic capability. The SN74BCT29854 provides inverting logic. The SN74BCT29854 is characterized for operation from 0C to 70C. FUNCTION TABLE INPUTS OUTPUT AND I/O Bi of L's A B PARITY ERR FUNCTION OEB OEA CLR LE Ai of H's L H X X Odd Even NA NA A H L NA H L X L NA Odd Even B NA NA H L H L H H NA X X NA NA N-1 X X L H X X X NA NA H H H H L X X H H L L X X L Odd H Even X Z Z Z NC H L H Isolation L L X X Odd Even NA NA A L H NA A data to B bus and generate inverted parity A data to B bus and generate parity B data to A bus and check parity Store error flag Clear error-flag register NA = not applicable, NC = no change, X = don't care Summation of low-level inputs includes PARITY along with Bi inputs. Output states shown assume the ERR output was previously high. In this mode, the ERR output, when enabled, shows noninverted parity of the A bus. Copyright 1993, Texas Instruments Incorporated ! " #$%! " &$'(#! )!%* )$#!" # ! "&%##!" &% !+% !%" %," "!$%!" "!)) -!.* )$#! &#%""/ )%" ! %#%""(. #($)% !%"!/ (( &%!%"* * DALLAS, TEXAS 75265 * HOUSTON, TEXAS 77251-1443 POST OFFICE BOX 655303 POST OFFICE BOX 1443 2-1 SCBS257 - SEPTEMBER 1987 - REVISED NOVEMBER 1993 logic diagram (positive logic) A1 -A8 8x 8 8 B1 -B8 EN 8x 8 EN OEB 8 OEA PARITY 8 MUX 1 1 2k 9 P 1 1 G1 ERR LE CLR 2-2 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * SCBS257 - SEPTEMBER 1987 - REVISED NOVEMBER 1993 error-flag waveforms OEB H L OEA H L Even Bi + PARITY Odd LE H L CLR H L ERR H L Pass Sample Store Clear ERROR-FLAG FUNCTION TABLE INPUTS INTERNAL TO DEVICE OUTPUT PRESTATE OUTPUT FUNCTION LE CLR POINT P ERRn-1 ERR L L L H X L H Pass L H L X H X L H L L H Sample H L X X H Clear X L H L H Store H H ERRn-1 represents the state of the ERR output before any changes at CLR, LE, or point P. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled I/O port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C Stresses beyond those listed under "absolute maximum ratings" 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. * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * 2-3 SCBS257 - SEPTEMBER 1987 - REVISED NOVEMBER 1993 recommended operating conditions VCC VIH Supply voltage VIL VOH Low-level input voltage IOH IOL High-level output current TA Operating free-air temperature High-level input voltage MIN NOM MAX 4.5 5 5.5 2 V V 0.8 High-level output voltage UNIT ERR Low-level output current 0 V 2.4 V -24 mA 48 mA 70 C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK TEST CONDITIONS VCC = 4.5 V, VOH All inputs /outputs except ERR VCC = 4.5 V IOH VOL ERR VCC = 4.5 V, VCC = 4.5 V, II IIH IIL MIN II = -18 mA IOH = - 15 mA IOH = - 24 mA VOH = 2.4 V TYP V V 2 20 0.35 A 0.5 V 0.1 mA VI = 2.7 V 20 A VCC = 5.5 V, VI = 0.4 V -0.75 VCC = 5.5 V, VCC = 5.5 V, VO = 0 Outputs open Data IOS ICCL UNIT -1.2 2.4 IOL = 48 mA VI = 5.5 V VCC = 5.5 V, VCC = 5.5 V, Control MAX -0.2 -75 ICCZ VCC = 5.5 V, Outputs open All typical values are at VCC = 5 V, TA = 25C. These parameters include off-state output current for I/O ports only. Not more than one output should be tested at a time, and the duration of the test should not exceed one second. mA -250 mA 55 80 mA 30 45 mA timing requirements over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) MIN LE low 10 CLR low 10 MAX UNIT tw Pulse duration tsu Setup time before LE Bi and PARITY 18 ns th Hold time after LE Bi and PARITY 8 ns 2-4 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * ns SCBS257 - SEPTEMBER 1987 - REVISED NOVEMBER 1993 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Note 1) FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPLH tPHL A PARITY tPZH tPZL OEA or OEB A or B tPHZ tPLZ OEA or OEB A or B PARAMETER tPLH tPHL CLR ERR LE tPLH tPHL OEA PARITY tPLH tPHL Bi / PARITY ERR VCC = 5 V, TA = 25C MIN MAX 7 1 8 5 7 1 8 1.5 10 13 1.5 15 1.5 10 13 1.5 15 2 12 15 2 17 2 13 16 2 19 2 8 11 2 15 2 10 14 2 17 1.5 11 13 1.5 15 1.5 5 7 1.5 9 1.5 10 13 1.5 15 1.5 10 13 1.5 16 1.5 15 18 1.5 20 1.5 10 13 1.5 15 MIN TYP MAX 1 5 1 UNIT ns ns ns ns ns ns ns NOTE 1: Load circuits and voltage waveforms are shown in Section 1. * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * 2-5 SCBS257 - SEPTEMBER 1987 - REVISED NOVEMBER 1993 2-6 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * PACKAGE OPTION ADDENDUM www.ti.com 18-Aug-2011 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp SN74BCT29854DW ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) SN74BCT29854NT ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74BCT29854NT ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74BCT29854NTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74BCT29854NTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type (3) Samples (Requires Login) CU NIPDAU Level-1-260C-UNLIM (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP(R) Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com Wireless www.ti.com/wireless-apps RF/IF and ZigBee(R) Solutions www.ti.com/lprf TI E2E Community Home Page e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2011, Texas Instruments Incorporated