SN75121N

SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 D D D D D D D D Designed for Digital Data Transmission Over 50-Ω to 500-Ω Coaxial Cable, Strip Line, or Twisted Pair High Speed tpd = 20 ns Maximum at CL = 15 pF TTL Compatible With Single 5-V Supply 2.4-V Output at IOH = – 75 mA Uncommitted Emitter-Follower Output Structure for Party-Line Operation Short-Circuit Protection AND-OR Logic Configuration Designed for Use With Triple Line Receivers SN55122, SN75122 Designed to Be Interchangeable With Signetics N8T13 SN55121 . . . J PACKAGE SN75121 . . . D OR N PACKAGE (TOP VIEW) 1A 1B 1C 1D 1E 1F 1Y GND 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC 2F 2E 2D 2C 2B 2A 2Y 1C 1D NC 1E 1F 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 2E 2D NC 2C 2B 1Y GND NC 2Y 2A The low-impedance emitter-follower outputs of the SN55121 and SN75121 can drive terminated lines such as coaxial cable or twisted pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops below approximately 1.5 V. All of the inputs are in conventional TTL configuration and the gating can be used during power-up and power-down sequences to ensure that no noise is introduced to the line. 16 SN55121 . . . FK PACKAGE (TOP VIEW) description The SN55121 and SN75121 dual line drivers are designed for digital data transmission over lines having impedances from 50 to 500 Ω. They are also compatible with standard TTL logic and supply-voltage levels. 1 1B 1A NC VCC 2F D NC – No internal connection THE SN75121 IS NOT RECOMMENDED FOR NEW DESIGNS The SN55121 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN75121 is characterized for operation from 0°C to 70°C. 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. Copyright  1998, 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 SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 FUNCTION TABLE INPUTS A B C D H H H H X X X X F OUTPUT Y X X H H H H E All other input combinations L H = high level, L = low level, X = irrelevant logic symbol† 1A 1B 1C 1D 1E 1F 2A 2B 2C 2D 2E 2F 1 logic diagram (positive logic) & 2 1 1A 2 1B 3 1C 4 1D ≥1 3 4 7 5 1Y 1E & 6 1F 7 6 10 11 12 9 13 2A 2B 2C 2D 2Y 14 15 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. 2E 2F 10 11 12 13 9 2Y 14 15 schematic (each driver) VCC To Other Line Driver 4 kΩ 4 kΩ 360 Ω A B C D E F 15 Ω Y GND To Other Line Driver All resistor values shown are nominal. 2 1Y 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C Case temperature for 60 seconds: FK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . . . . . . . . . . . . . . . 300°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or N package . . . . . . . . . . . . . . . . 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. NOTE 1: All voltage values are with respect to both ground terminals connected together. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 125°C POWER RATING D 950 mW 7.6 mW/°C 608 mW — FK‡ J‡ 1375 mW 11.0 mW/°C 880 mW 275 mW 1375 mW 11.0 mW/°C 880 mW 275 mW N 1150 mW 9.2 mW/°C 736 mW ‡ In the FK and J packages, SN55121 chips are either silver glass or alloy mounted. — recommended operating conditions SN55121 Supply voltage, VCC High-level input voltage, VIH SN75121 MIN NOM MAX MIN NOM MAX 4.75 5 5.25 4.75 5 5.25 2 Low-level input voltage, VIL High-level output current, IOH Operating free-air temperature, TA – 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 UNIT V V 0.8 0.8 V – 75 – 75 mA 70 °C 125 0 3 SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 electrical characteristics over recommended ranges of supply voltage and operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK V(BR) Input clamp voltage VOH High-level output voltage Breakdown voltage IOH High-level output current IOL IO(off) Low-level output current IIH IIL High-level output current IOS ICCH Short-circuit output current† Off-state output current MIN V 5.5 V VIH = 2 V, VCC = 5 V, TA = 25°C, IOH = – 75 mA, VIH = 4.5 V, See Note 2 See Note 2 2.4 V VOH = 2 V, – 100 VIL = 0.8 V, VCC = 3 V, VOL = 0.4 V, VO = 3 V See Note 2 – 0.1 VCC = 5 V, VCC = 5.25 V, Supply current, outputs high UNIT – 1.5 II = – 12 mA II = 10 mA VI = 4.5 V VI = 0.4 V Low-level output current MAX VCC = 5 V, VCC = 5 V, TA = 25°C All inputs at 2 V, – 250 mA – 800 µA 500 µA 40 µA – 1.6 mA – 30 mA 28 mA Outputs open ICCL Supply current, outputs low VCC = 5.25 V, All inputs at 0.8 V, Outputs open 60 mA † Not more than one output should be shorted at a time. NOTE 2: The output voltage and current limits are valid for any appropriate combination of high and low inputs specified by the function table for the desired output. switching characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS tPLH tPHL Propagation delay time, low-to-high level output tPLH tPHL Propagation delay time, low-to-high level output Propagation delay time, high-to-low level output Propagation delay time, high-to-low level output MIN RL = 37 Ω Ω, CL = 15 pF, pF See Figure 1 RL = 37 Ω Ω, CL = 1000 pF, pF See Figure 1 TYP MAX 11 20 8 20 22 50 20 50 UNIT ns ns PARAMETER MEASUREMENT INFORMATION 3V ≤ 5 ns VCC 90% 1.5 V Input ≤ 5 ns 10% 10% Pulse Generator (see Note A) tPLH Output RL CL (see Note B) 3V 90% 1.5 V 0V tPHL VOH Output 1.5 V 1.5 V VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The pulse generator has the following characteristics: ZO ≈ 50 Ω, tw = 200 ns, duty cycle ≤ 50%, PRR ≤ 500 kHz. B. CL includes probe and jig capacitance. Figure 1. Test Circuit and Voltage Waveforms 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 TYPICAL CHARACTERISTICS OUTPUT CURRENT vs OUTPUT VOLTAGE – 300 VCC = 5 V VIH = 2 V TA = 25°C IO I O – Output Current – mA – 250 – 200 – 150 – 100 – 50 0 0 0.5 1 1.5 2 2.5 3 3.5 4 VO – Output Voltage – V 4.5 5 Figure 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 APPLICATION INFORMATION 1/3 SN55122 75-Ω Coaxial Cable 75-Ω Coaxial Cable 75 Ω 75 Ω 1/2 SN55121 1/2 SN55121 75-Ω Coaxial Cable 1/3 SN55122 75 Ω 75 Ω 1/2 SN55121 1/2 SN55121 Figure 3. Single-Ended Party-Line Circuits 6 1/3 SN55122 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) SN75121N ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN75121N SN75121NSR ACTIVE SO NS 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 SN75121 (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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of