SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 D D D D D D D D D D Members of the Texas Instruments Widebus Family Inputs Are TTL-Voltage Compatible Inverting Data Paths Independent Registers and Enables for A and B Buses Multiplexed Real-Time and Stored Data Flow-Through Architecture Optimizes PCB Layout Distributed VCC and GND Pin Configurations Minimize High-Speed Switching Noise EPIC (Enhanced-Performance Implanted CMOS) 1-µm Process 500-mA Typical Latch-Up Immunity at 125°C Packaged in Plastic 300-mil Shrink Small-Outline (DL) Packages and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Pin Spacings description The SN54ACT16651 and 74ACT16651 are 16-bit bus transceivers that consist of D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. Complementary output-enable (OEAB and OEBA) inputs are provided to control the transceiver functions. Select-control (SAB and SBA) inputs are provided to select whether real-time or stored data is transferred. A low input level selects real-time data, and a high input level selects stored data. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the SN54ACT16651 and 74ACT16651. SN54ACT16651 . . . WD PACKAGE 74ACT16651 . . . DL PACKAGE (TOP VIEW) 1OEAB 1CLKAB 1SAB GND 1A1 1A2 VCC 1A3 1A4 1A5 GND 1A6 1A7 1A8 2A1 2A2 2A3 GND 2A4 2A5 2A6 VCC 2A7 2A8 GND 2SAB 2CLKAB 2OEAB 1 56 2 55 3 54 4 53 5 52 6 51 7 50 8 49 9 48 10 47 11 46 12 45 13 44 14 43 15 42 16 41 17 40 18 39 19 38 20 37 21 36 22 35 23 34 24 33 25 32 26 31 27 30 28 29 1OEBA 1CLKBA 1SBA GND 1B1 1B2 VCC 1B3 1B4 1B5 GND 1B6 1B7 1B8 2B1 2B2 2B3 GND 2B4 2B5 2B6 VCC 2B7 2B8 GND 2SBA 2CLKBA 2OEBA Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. EPIC and Widebus are trademarks of Texas Instruments Incorporated. Copyright 1996, Texas Instruments Incorporated UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 description (continued) Data on the A or B bus, or both, can be stored in the internal D flip-flops by low-to-high transitions at the appropriate clock (CLKAB or CLKBA) inputs regardless of the levels on the select-control or output-enable inputs. When SAB and SBA are in the real-time transfer mode, it is also possible to store data without using the internal D-type flip-flops by simultaneously enabling OEAB and OEBA. In this configuration, each output reinforces its input. Thus, when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remains at its last state. The 74ACT16651 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area. The SN54ACT16651 is characterized for operation over the full military temperature range of –55°C to 125°C. The 74ACT16651 is characterized for operation from –40°C to 85°C. FUNCTION TABLE DATA I/O† INPUTS OPERATION OR FUNCTION OEAB OEBA CLKAB CLKBA SAB SBA A1–A8 B1–B8 L H L L X X Input Input Isolation L H ↑ ↑ X X Input H ↑ L X Input H H ↑ ↑ X X‡ Input Unspecified‡ Store A and B data X X Input Output Store A in both registers L X L ↑ X Unspecified‡ Input Hold A, store B L L ↑ ↑ X X X‡ Output Input Store B in both registers L L X X X L Output Input Real-time B data to A bus Store A, hold B L L X L X H Output Input Stored B data to A bus H H X X L X Input Output Real-time A data to B bus H H L X H X Input Output Stored A data to B bus Output Stored A data to B bus and stored B data to A bus H L L L H H Output † The data-output functions may be enabled or disabled by a variety of level combinations at OEAB or OEBA. Data-input functions are always enabled; i.e., data at the bus terminals is stored on every low-to-high transition of the clock inputs. ‡ Select control = L; clocks can occur simultaneously. Select control = H; clocks must be staggered to load both registers. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS OEAB OEBA L L CLKAB CLKBA SAB X X X BUS B BUS A BUS A BUS B SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 SBA L OEAB OEBA H H OEBA H X H CLKAB CLKBA SAB ↑ X ↑ X ↑ ↑ SAB L X X X SBA X BUS B BUS A BUS A OEAB X L L CLKBA X REAL-TIME TRANSFER BUS A TO BUS B BUS B REAL-TIME TRANSFER BUS B TO BUS A CLKAB X SBA X X X STORAGE FROM A, B, OR A AND B OEAB H OEBA L CLKAB CLKBA SAB SBA L L H H TRANSFER STORED DATA TO A AND/OR B Figure 1. Bus-Management Functions POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 logic symbol† 56 1OEBA 1OEAB 1CLKBA 1SBA 1CLKAB 1SAB 2OEBA 2OEAB 2CLKBA 2SBA 2CLKAB 2SAB 1A1 1 55 54 2 EN1 [BA] EN2 [AB] C3 G4 C5 3 29 28 30 31 27 26 G6 EN7 [BA] EN8 [AB] C9 G10 C11 G12 ≥1 5 3D 4 1 52 1B1 4 1 5D 1A2 1A3 1A4 1A5 1A6 1A7 1A8 2A1 6 1 6 ≥1 2 6 51 8 49 9 48 10 47 12 45 13 44 14 43 ≥1 15 10 7 9D 42 1B2 1B3 1B4 1B5 1B6 1B7 1B8 2B1 10 1 11D 12 ≥1 8 2A2 2A3 2A4 2A5 2A6 2A7 2A8 16 1 12 40 19 38 20 37 21 36 23 34 24 33 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 4 41 17 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2B2 2B3 2B4 2B5 2B6 2B7 2B8 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 logic diagram (positive logic) 1OEBA 1OEAB 1CLKBA 1SBA 56 1 55 54 1CLKAB 2 3 1SAB C1 TG 1A1 1D 5 TG C1 TG 1D 52 TG 1B1 To Seven Other Channels 2OEBA 2OEAB 2CLKBA 2SBA 29 28 30 31 2CLKAB 27 26 2SAB C1 TG 2A1 1D 15 TG C1 TG 1D 42 TG 2B1 To Seven Other Channels POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±400 mA Maximum package power dissipation at TA = 55°C (in still air) (see Note 2): DL package . . . . . . . . . . . 1.4 W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C † 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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperature of 150_C and a board trace length of 750 mils. recommended operating conditions (see Note 3) SN54ACT16651 NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL VI Low-level input voltage Input voltage 0 VO IOH Output voltage 0 High-level output current IOL ∆t/∆v Low-level output current High-level input voltage 2 2 0.8 Input transition rise or fall rate TA Operating free-air temperature NOTE 3: Unused inputs must be held high or low to prevent them from floating. POST OFFICE BOX 655303 UNIT V V 0.8 V VCC VCC V –24 –24 mA 24 24 mA VCC VCC 0 0 V 0 10 0 10 ns/V –55 125 –40 85 °C PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 6 74ACT16651 MIN • DALLAS, TEXAS 75265 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS 4.5 V IOH = –50 50 µA VOH 24 mA IOH = –24 IOH = –50 mA† IOH = –75 mA† II IOZ‡ A or B ports ICC ∆ICC§ Ci Control inputs Cio A or B ports TA = 25°C SN54ACT16651 TYP MAX MIN MAX 74ACT16651 MIN 4.4 4.4 4.4 5.5 V 5.4 5.4 5.4 4.5 V 3.94 3.7 3.8 5.5 V 4.94 4.7 4.8 MAX UNIT V 3.85 5.5 V IOL = 24 mA Control inputs MIN 5.5 V IOL = 50 µA VOL VCC 3.85 4.5 V 0.1 0.1 5.5 V 0.1 0.1 0.1 0.1 4.5 V 0.36 0.5 0.44 5.5 V 0.36 0.5 0.44 V IOL = 50 mA† IOL = 75 mA† 5.5 V VI = VCC or GND VO = VCC or GND 5.5 V ±0.1 ±1 ±1 µA 5.5 V ±0.5 ±10 ±5 µA VI = VCC or GND, IO = 0 One input at 3.4 V, Other inputs at VCC or GND 5.5 V 8 160 80 µA 5.5 V 0.9 1 1 mA 1.65 5.5 V VI = VCC or GND VO = VCC or GND 1.65 5V 4 pF 5V 12 pF † Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms. ‡ For I/O ports, the parameter IOZ includes the input leakage current. § This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC. timing requirements over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 2) TA = 25°C SN54ACT16651 MIN MAX MIN MAX 0 0 90 MIN MAX 0 90 UNIT fclock tw Clock frequency Pulse duration, CLKAB or CLKBA high or low 5.5 5.5 5.5 ns tsu th Setup time, A before CLKAB↑ or B before CLKBA↑ 5.3 5.3 5.3 ns 1 1 1 ns Hold time, A after CLKAB↑ or B after CLKBA↑ 90 74ACT16651 MHz PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 2) PARAMETER fmax tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ FROM (INPUT) TO (OUTPUT) MIN TA = 25°C SN54ACT16651 TYP MAX MIN MAX 90 A or B B or A CLKBA or CLKAB A or B SBA or SAB (with A or B high) A or B SBA or SAB (with A or B low) A or B OEBA A OEBA A OEAB B OEAB B 74ACT16651 MIN 90 MAX 90 UNIT MHz 3 6.6 10 3 12.2 3 11.3 4.6 8 10.6 4.6 12.7 4.6 11.9 5.4 9.1 12 5.4 14.8 5.4 13.7 5.4 9.1 12 5.4 14.6 5.4 13.6 4.6 7.9 10.5 4.6 13.1 4.6 12.1 5.4 10.9 15.5 5.4 19.6 5.4 17.8 5 10.4 14.9 5 19.2 5 17.3 4.9 8.6 11.9 4.9 13.7 4.9 12.7 3.2 7.2 10.8 3.2 13.6 3.2 12.3 3.8 8 12.2 3.8 15.3 3.8 13.9 5.1 7.8 9.8 5.1 11.3 5.1 10.6 4.9 7.7 9.9 4.9 11.4 4.9 10.8 4.9 8 10.5 4.9 12.9 4.9 11.9 5.4 8.8 11.8 5.4 14.7 5.4 13.5 4.3 7.5 10.7 4.3 12 4.3 11.4 4.5 7.6 10.8 4.5 12.3 4.5 11.6 ns ns ns ns ns ns ns ns operating characteristics, VCC = 5 V, TA = 25°C PARAMETER Cpd d Power dissipation capacitance per transceiver TEST CONDITIONS Outputs enabled Outputs disabled PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 pF CL = 50 pF, f = 1 MHz TYP 62 14 UNIT pF SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996 PARAMETER MEASUREMENT INFORMATION 2 × VCC S1 500 Ω From Output Under Test Open GND TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND 500 Ω CL = 50 pF (see Note A) LOAD CIRCUIT 3V Timing Input 1.5 V 0V tw tsu 3V Input 1.5 V th 1.5 V 3V 1.5 V 1.5 V Data Input 0V 0V VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS Output Control (low-level enabling) 3V 1.5 V Input 1.5 V 0V tPHL tPLH In-Phase Output 50% VCC 50% VCC 0V tPZL tPLZ Output Waveform 1 S1 at 2 × VCC (see Note B) tPLH tPHL Out-of-Phase Output VOH 50% VCC VOL 3V VOH 50% VCC VOL Output Waveform 2 S1 at GND (see Note B) 1.5 V 1.5 V 50% VCC 20% VCC VOL tPHZ tPZH VOLTAGE WAVEFORMS ≈ VCC 50% VCC 80% VCC VOH ≈0V VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns. D. The outputs are measured one at a time with one input transition per measurement. Figure 2. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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