SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 D D D D D D D D D D D D Nine Single-Ended SCSI Transceiver Channels With Active Termination Programmable Drivers Provide Active Negation (Totem Pole) or Wired-OR (Open Drain) Outputs 24-mA Current-Mode Active Termination With Common Nine-Channel Bus Enable Low Output Capacitance Presented to SCSI Bus, 13.5 pF Typ 3.3 V Compatible Logic Inputs Provide Bridge from 3 V Controllers to 5 V SCSI Bus Designed to Operate at 10-Million Data Transfers Per Second (Fast-SCSI) Controlled Driver Rise and Fall Times 5 ns Min High-Receiver Input-Voltage Hysteresis 500 mV Typ Receiver Input-Noise Pulse Filter 5 ns Typ Each Driver and Receiver Meets ANSI X3.131-1994 (SCSI-2) and the Proposed SCSI-3 Standards Power-Up/Power-Down Glitch Protection High Impedance Driver With VCC at 0 V description DL PACKAGE (TOP VIEW) GND TE GND 1A 1DE/RE 2A 2DE/RE 3A 3DE/RE 4A 4DE/RE VCC1 GND GND GND GND GND VCC 5A 5DE/RE 6A 6DE/RE 7A 7DE/RE 8A 8DE/RE 9A 9DE/RE 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 8B GND CE NC NC NC 7B NC 6B NC 5B VCC GND GND GND GND GND VCC NC 4B NC 3B NC 2B NC 1B NC 9B 29 The SN75LBC968 is a nine-channel transceiver with active termination that drives and receives NC – No internal connection the signals from the single-ended, parallel data buses such as the Small Computer-Systems Interface (SCSI) bus. The features of the line drivers, receivers, and active-termination circuits provide the optimum signal-to-noise ratios for reliable data transmission. Integration of the termination and transceivers in the LinBiCMOS process provides the necessary analog-circuit performance, has low quiescent power, and reduces the capacitance presented to the bus over separate termination and I/O circuits. The transceivers of the SN75LBC968 can be enabled to function as totem-pole or open-drain outputs. The open-drain mode drives the wired-OR lines of SCSI (BSY, SEL, and RST) by inputting the data to the direction control input DE/RE instead of the A input. When driving the data through the A input, the outputs become totem poles and provide active signal negation for a higher voltage level on low-to-high signal transitions on heavily loaded buses. In either mode, the turn-on and turn-off output transition times are limited to minimize crosstalk through capacitive coupling to adjacent lines and RF emissions from the cable. The receivers are also designed for optimum analog performance by precisely controlling the input-voltage thresholds, providing wide input-voltage hysteresis and including an input-noise filter. These features significantly increase the likelihood of detecting only the desired data signal and rejecting noise. 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. LinBiCMOS is a trademark of Texas Instruments Incorporated. Copyright 1999, Texas Instruments Incorporated PRODUCTION DATA information is 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 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 description (continued) The communication between the SN75LBC968 and the controller can be accomplished at 3.3-V logic levels provided that the VCC1 input connects to the same supply rail as the controller. This provides a bridge from the lower-voltage circuit and the 5-V SCSI bus. The SN75LBC968 also removes the need for special I/O buffers (and associated power dissipation) on the controller itself. The SN75LBC968 must be used with a SCSI controller with support for Differential SCSI. The integrated, current-mode, active termination supplies a constant 24 mA of current (TERMPWR) to the bus when the bus voltage falls below 2.5 V. This makes the next low-to-high (negation) signal transition independent of the low-level (asserted) bus voltage, unlike voltage-mode terminators. The termination current is provided through the TE input and from TERMPWR and can be disabled by letting the TE input float or by connecting it to ground. The termination circuitry is independent from the line drivers and receivers and VCC or VCC1. Operational termination is present as long as TERMPWR is applied. The switching speeds of the SN75LBC968 are sufficient to transfer data over the data bus at ten million transfers per second (Fast-SCSI). The specification, tsk(lim), is for system skew budgeting and maintenance of bus set-up and hold times. The device is available in the space-efficient shrink-small-outline package (SSOP) with 25-mil lead pitch. The SN75LBC968 meets or exceeds the requirements of ANSI X3.131–1994 (SCSI-2) and the proposed SPI (SCSI-3) standards, and is characterized for operation from 0°C to 70°C. logic diagram (positive logic) Function Tables Active Terminator TE 1A 1DE/RE CE 2A 2DE/RE 3A 3DE/RE 4A 4DE/RE 5A 5DE/RE 6A 6DE/RE 7A 2 4 31 1B 5 6 33 7 8 Channel 2 9 Channel 3 35 10 11 CE L H H H H H H 54 37 Channel 4 19 46 20 21 Channel 5 22 Channel 6 48 23 24 7DE/RE 25 8A 26 8DE/RE 27 9A 28 9DE/RE 2 TRANSCEIVER FUNCTIONS 50 Channel 7 56 Channel 8 29 Channel 9 POST OFFICE BOX 655303 2B INPUTS DE/RE A X L L H H L H H = high level X = irrelevant B X X L X H X X L X H Open X X Open OUTPUTS A B Z H L Z Z H Z L = low level Z = high impedance 3B TERMINATION FUNCTION 4B INPUT TE OUTPUT B GND VTE Open Z 24-mA source Z 5B 6B 7B 8B 9B • DALLAS, TEXAS 75265 Z Z Z H L Z L SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 schematics DRIVER ACTIVE TERMINATOR VCC TE 10 Ω 50 Ω 2.85 V 2.85 V RECEIVER VCC Vref B absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC, VCC1, VTE (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Input voltage range, VI (A-side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC1 + 0.3 V Bus voltage range (B-side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Data I/O and control (A-side) voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Continuous power dissipation (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°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. All voltage values are with respect to GND. 2. The maximum operating-junction temperature is internally limited. Use the dissipation rating table to operate below this temperature. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR† ABOVE TA = 25°C TA = 70°C POWER RATING DL 2500 mW 20 mW/°C 1600 mW † Derating factors are the inverse of the junction-to-ambient thermal resistance when board-mounted with no air flow. recommended operating conditions Supply voltage, VCC MIN NOM MAX UNIT 4.75 5 5.25 V 3 5.25 V 4.25 5.25 V Supply voltage, VCC1 (see Note 3) Termination voltage, VTE High-level input voltage, VIH DE/RE, CE, A, B Low-level input voltage, VIL DE/RE, CE, A, B 0.8 V High-level output current, IOH A –8 mA B 48 A 8 Low level output current, Low-level current IOL 2 Operating free-air temperature, TA V 0 70 mA °C NOTE 3: All electrical characteristics are measured with VCC1 = VCC unless otherwise noted. driver electrical characteristics over recommended operating conditions (unless otherwise noted) (see Figure 1) PARAMETER VOH VOL High-level output voltage IIH IIL High-level input current IOZ Low-level output voltage Low-level input current, A High impedance state output current High-impedance-state TEST CONDITIONS MIN IOH = – 20 mA IOL = 48 mA MAX 2 UNIT V 0.5 V VIH = 2 V, VIL = 0.5 V, VCC = VCC1 = 5.25 V – 100 µA VCC = VCC1 = 5.25 V – 100 µA VO = 5.25 V, VO = 0 V, VCC = VCC1 = 5.25 V – 100 VCC = VCC1 = 5.25 V – 100 µA termination electrical characteristics over recommended operating conditions (unless otherwise noted) (see Figure 2) PARAMETER VO(OC) IO Open-circuit output voltage Output current MIN TYP MAX IO = 0 mA, VO = 0 V, TEST CONDITIONS VCC = VCC1 = 0 V VCC = VCC1 = 0 V 2.5 2.85 3.24 V – 24 mA VO = 0.5 V, VO = 3 V, VCC = VCC1 = 0 V – 20 – 24 mA VO = 4 V, 4 POST OFFICE BOX 655303 VCC = VCC1 = 0 V VCC = VCC1 = 0 V • DALLAS, TEXAS 75265 2 UNIT 100 µA 12 mA SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 receiver electrical characteristics over recommended operating conditions (unless otherwise noted) (see Figure 3) PARAMETER VOH VOL High-level output voltage VIT+ VIT – Positive-going input threshold voltage Vhys Input hysteresis voltage (VIT+ – VIT –) IIH IIL High-level input current IOZ TEST CONDITIONS IOH = – 8 mA IOL = 8 mA Low-level output voltage VCC = VCC1 Negative-going input threshold voltage MIN TYP 2 2.5 0.8 V 1.2 1.6 2 V 0.8 1.1 1.4 V 0.2 0.5 100 µA 100 µA VIH = 2 V VIL = 0.5 V Low-level input current VO = 0 V VO = 5.25 V High impedance state output current High-impedance-state MAX UNIT V V – 100 – 100 µA device electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER All drivers, receivers, and terminator disabled ICC Supplyy current to VCC and VCC1 TYP† MAX 1.3 3 14 21 DE / RE and CE at VCC, A and TE at 0 V 33 45 DE / RE and CE at VCC, VTE = 0 V, A at VCC1 15 21 TE at VTE, 33 45 13.5 16.5 pF 100 µA 100 µA TEST CONDITIONS All inputs at 0 V All receivers enabled, termination and CE at VCC, drivers disabled, No load TE at 0 V All drivers enabled,, termination and receivers disabled, No load Termination and receivers enabled, No load ICC Supply current to TE Co Bus port capacitance (see Note 4) DE / RE at 0 V, DE / RE at 0 V IIH High-level input current DE/RE, CE VIH = VCC or 2 V IIL Low-level input current DE/RE, CE VIL = 0.5 V † All typical values are at VCC = VCC1 = 5 V, TA = 25°C. NOTE 4: Tested in accordance with Annex G X3T9.2/855D, revision 14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN UNIT mA 5 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 driver switching characteristics over recommended operating conditions (unless otherwise noted) PARAMETER tPHL TEST CONDITIONS Propagation delay time, high- to low-level output (see Figure 4) tPLH Propagation delay time, low- to high-level output (see Figure 4) tsk(lim) k(li ) Skew limit‡, the maximum delay time – minimum delay time MIN TYP† MAX UNIT 10 35 ns 15 45 ns VCC = VCC1 = 5 V, TA = 25°C, CL = 15 pF 14 ns VCC = VCC1 = 5 V, TA = 70°C, CL = 15 pF 14 ns CL = 15 pF tsk(p) Pulse skew, |tPHL – tPLH| VCC = VCC1 = 5 V, TA = 25°C tt Output transition time, 10% to 90% or 90% to 10% of the steady-state output 15 pF < CL < 100 pF tPLZ Propagation g delay y time,, low-level to high-impedance g output (see Figure 5) From CE, CL = 15 pF From DE/RE, CL = 15 pF tPZL Propagation g delay y time, high-impedance g to low-level output (see Figure 5) From CE, CL = 15 pF From DE/RE, CL = 15 pF 8 ns 5 20 5 150 45 5 150 45 ns ns ns † All typical values are at VCC = VCC1 = 5 V, TA = 25°C. ‡ The value for this parameter was derived from the difference between the slowest and the fastest driver delay times measured on devices from four sample wafer lots. receiver switching characteristics over recommended of operating conditions (unless otherwise noted) PARAMETER tPHL tPLH tsk(lim) k(li ) TEST CONDITIONS Propagation delay time, high- to low-level output Propagation delay time, low- to high-level output Skew limit‡, the maximum delay time – minimum delay time See Figure 6 MIN TYP† MAX UNIT 5 20 ns 5 25 ns VCC = VCC1 = 5 V, TA = 25°C, See Figure 6 8.5 ns VCC = VCC1 = 5 V, TA = 70°C, See Figure 6 8.5 ns VCC = VCC1 = 5 V, TA = 25°C, See Figure 6 tsk(p) Pulse skew, |tPHL – tPLH| tPLZ Propagation g delay y time,, low-level to high-impedance g output From CE, See Figure 7 From DE/RE, See Figure 7 tPZL Propagation g delay y time,, high-impedance g to low-level output From CE, See Figure 7 From DE/RE, See Figure 7 tPHZ Propagation g delay y time,, high-level g to high-impedance g output From CE, See Figure 8 From DE/RE, See Figure 8 tPZH Propagation g delay y time,, high-impedance g to high-level g output From CE, See Figure 8 From DE/RE, See Figure 8 6 5 ns 150 45 5 150 80 5 150 45 5 150 80 ns ns ns ns † All typical values are at VCC = VCC1 = 5 V, TA = 25°C. ‡ The value for this parameter was derived from the difference between the slowest and the fastest driver delay times measured on devices from four sample wafer lots. thermal characteristics PARAMETER TEST CONDITIONS RθJA Junction-to-free-air thermal resistance RθJC Junction-to-case thermal resistance TJS Junction-shutdown temperature 6 POST OFFICE BOX 655303 Board-mounted, no air flow • DALLAS, TEXAS 75265 MIN TYP MAX UNIT 50 °C/W 12 °C/W 180 °C SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 PARAMETER MEASUREMENT INFORMATION TE II Termination A VI IO B DE / RE To VCC CE To VCC or to GND for IOZ VO Figure 1. Driver Test Circuit Currents and Voltages. II TE VTE Termination A IO B DE / RE CE VO Figure 2. Active Termination Voltages, Currents, and Test Circuit. TE II B To GND VO Termination To VCC or to GND for IOZ IO A DE / RE CE VO Figure 3. Receiver Voltages, Currents, and Test Circuit NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr duty cycle = 50%, ZO = 50 Ω. B. All resistances are in ohms and ± 5%, unless otherwise indicated. C. All capacitances are in picofarads and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 6 ns, tf 6 ns, PRR 1 MHz, 7 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 PARAMETER MEASUREMENT INFORMATION TE Termination A 47 Ω B DE / RE + Inputs CE Output CL 2.5 V – CE VCC 50% 0V DE / RE VCC 50% 0V A VCC 50% VOL 0V tPLH tPHL 2.5 V 50% VOL B NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr duty cycle = 50%, ZO = 50 Ω. B. All resistances are in ohms and ± 5%, unless otherwise indicated. C. All capacitances are in picofarads and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. 6 ns, tf 6 ns, PRR 1 MHz, Figure 4. Driver Delay Time Test Circuit and Waveforms 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 VCC 560 Ω TE Termination A 47 Ω B DE / RE + Inputs CE CL Output 2.5 V – VCC 50% 0V CE Input is Either CE or DE / RE DE / RE VCC 50% 0V A VCC 50% VOL tPLZ tPZL 2.5 V 50% VOL B NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr duty cycle = 50%, ZO = 50 Ω. B. All resistances are in ohms and ± 5%, unless otherwise indicated. C. All capacitances are in picofarads and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. 6 ns, tf 6 ns, PRR 1 MHz, Figure 5. Driver Delay Time Test Circuit and Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 PARAMETER MEASUREMENT INFORMATION TE Termination B A DE / RE To GND Input 15 pF CE To VCC Output VCC IN B 50% 50% 0V tPLH tPHL VOH OUT A 50% 50% VOL NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr duty cycle = 50%, ZO = 50 Ω. B. All resistances are in ohms and ± 5%, unless otherwise indicated. C. All capacitances are in picofarads and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. 6 ns, tf 6 ns, PRR 1 MHz, Figure 6. Receiver Propagation Delay Time Test Circuit and Waveforms 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 PARAMETER MEASUREMENT INFORMATION VCC TE 47 Ω B A DE / RE + 2.5 V 560 Ω Termination Inputs 15 pF 15 pF CE Output – CE VCC 50% 50% 0V Input is Either CE or DE / RE VCC DE / RE 50% 50% 0V B tPZL tPLZ VOH A 50% 50% VOL NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr duty cycle = 50%, ZO = 50 Ω. B. All resistances are in ohms and ± 5%, unless otherwise indicated. C. All capacitances are in picofarads and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. 6 ns, tf 6 ns, PRR 1 MHz, Figure 7. Receiver Enable and Disable Times to and From Low-Level Output Test Circuit and Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 PARAMETER MEASUREMENT INFORMATION GND TE 150 Ω B A DE / RE + 0V 560 Ω Termination Inputs 15 pF 15 pF CE Output – CE VCC 50% 50% 0V Input is Either CE or DE / RE VCC DE / RE 50% 50% 0V B tPZH tPHZ VOH A 50% 50% 0V NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr duty cycle = 50%, ZO = 50 Ω. B. All resistances are in ohms and ± 5%, unless otherwise indicated. C. All capacitances are in picofarads and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. 6 ns, tf 6 ns, PRR 1 MHz, Figure 8. Receiver Enable and Disable Times to and From High-Level Output Test Circuit and Waveforms 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 TYPICAL CHARACTERISTICS DRIVER AND TERMINATION TERMINATION LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 0.9 4 VTE = 5 V VCC = 5 V VCC1 = 5 V TA = 25°C 3.5 0.7 3 0.6 2.5 VO – Output Voltage –V VOL – Low-Level Output Voltage – V 0.8 0.5 0.4 0.3 0.2 0.1 VTE = 5 V VCC = 5 V VCC1 = 5 V TA = 25°C Driver disabled 2 1.5 1 0.5 0 10 20 30 40 50 60 70 80 90 0 100 0 3 6 IOL – Low-Level Output Current – mA 9 18 21 24 27 30 Figure 10 DRIVER DRIVER LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 0.8 4 VTE = 0 V VCC = 5 V VCC1 = 5 V TA = 25°C 0.6 0.5 0.4 0.3 0.2 0.1 0 10 20 VTE = 0 V VCC = 5 V VCC1 = 5 V TA = 25°C 3.5 VOH – High-Level Output Voltage – V 0.7 VOL – Low-Level Output Voltage – V 15 IO – Output Current – mA Figure 9 0 12 30 40 50 60 70 80 90 100 IOL – Low-Level Output Current – mA 3 2.5 2 1.5 1 0.5 0 0 10 20 30 40 50 60 70 80 90 100 IOH – High-Level Output Current – mA Figure 11 Figure 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 13 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 TYPICAL CHARACTERISTICS DRIVER RECEIVER PROPAGATION DELAY TIME vs FREE-AIR TEMPERATURE PROPAGATION DELAY TIME vs FREE-AIR TEMPERATURE 20 30 VCC = 4.75 V t PHL– Propagation Delay Time – ns t PLH – Propagation Delay Time – ns 35 tPLH VCC = 5.25 V 25 VCC = 4.75 V tPHL 20 VCC = 5.25 V 15 10 5 15 VCC = 4.75 V VCC = 5.25 V 10 VCC = 4.75 V tPHL VCC = 5.25 V 5 0 25 50 75 TA – Free-Air Temperature – °C 100 0 Figure 13 14 tPLH 25 50 75 TA – Free-Air Temperature – °C Figure 14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 100 SN75LBC968 9-CHANNEL BUS TRANSCEIVER WITH ACTIVE TERMINATION SLLS179C – APRIL 1994 – REVISED JANUARY 1999 MECHANICAL DATA DL (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 48-PIN SHOWN 0.025 (0,635) 0.012 (0,305) 0.008 (0,203) 48 0.005 (0,13) M 25 0.006 (0,15) NOM 0.299 (7,59) 0.291 (7,39) 0.420 (10,67) 0.395 (10,03) Gage Plane 0.010 (0,25) 1 0°– 8° 24 0.040 (1,02) A 0.020 (0,51) Seating Plane 0.110 (2,79) MAX 0.004 (0,10) 0.008 (0,20) MIN PINS ** 28 48 56 A MAX 0.380 (9,65) 0.630 (16,00) 0.730 (18,54) A MIN 0.370 (9,40) 0.620 (15,75) 0.720 (18,29) DIM 4040048 / D 08/97 NOTES: A. B. C. D. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0.006 (0,15). Falls within JEDEC MO-118 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 15 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 1999, Texas Instruments Incorporated