uA9638C DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER SLLS112C − OCTOBER 1980 − REVISED APRIL 1994 (cid:2) Meets or Exceeds ANSI Standard D OR P PACKAGE EIA/TIA-422-B (TOP VIEW) (cid:2) Operates From a Single 5-V Power Supply (cid:2) Drives Loads as Low as 50 Ω up V1CAC 12 87 11YZ to 15 Mbps 2A 3 6 2Y (cid:2) TTL- and CMOS-Input Compatibility GND 4 5 2Z (cid:2) Output Short-Circuit Protection (cid:2) Interchangeable With National Semiconductor™ DS9638 description The uA9638C is a dual high-speed differential line driver designed to meet ANSI Standard EIA/TIA-422-B. The inputs are TTL and CMOS compatible and have input clamp diodes. Schottky-diode-clamped transistors are used to minimize propagation delay time. This device operates from a single 5-V power supply and is supplied in an 8-pin package. The uA9638 provides the current needed to drive low-impedance loads at high speeds. Typically used with twisted-pair cabling and differential receiver(s), base-band data transmission can be accomplished up to and exceeding 15 Mbps in properly designed systems. The uA9637A dual line receiver is commonly used as the receiver. For even faster switching speeds in the same pin configuration, see the SN75ALS191. The uA9638C is characterized for operation from 0°C to 70°C. logic symbol† logic diagram 8 8 2 1Y 2 1Y 1A 7 1A 7 1Z 1Z 6 6 3 2Y 3 2Y 2A 5 2A 5 2Z 2Z †This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet. National Semiconductor is a trademark of National Semiconductor Corporation. PRODUCTION DATA information is current as of publication date. Copyright © 1994, Texas Instruments Incorporated 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

uA9638C DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER SLLS112C − OCTOBER 1980 − REVISED APRIL 1994 schematics of inputs and outputs EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS VCC VCC 4 kΩ NOM Input 9.6 Ω NOM Output GND absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V CC Input voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V I Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C A Storage temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C stg Lead temperature 1,6 mm (1/16 inch) from 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. NOTE 1: Voltage values except differential output voltages are with respect to network GND. DISSIPATION RATING TABLE PPAACCKKAAGGEE POWTTAAE R== 22R55A°TCCING DDAEEBRROAATTVIIENN GGTA FF =AA 2CC5TT°OOCRR POWTTAAE R== 77R00A°TCCING D 725 mW 5.8 mW/°C 464 mW P 1000 mW 8.0 mW/°C 640 mW recommended operating conditions MIN NOM MAX UNIT Supply voltage, VCC 4.75 5 5.25 V High-level input voltage, VIH 2 V Low-level input voltage, VIL 0.8 V High-level output current, IOH −50 mA Low-level output current, IOL 50 mA Operating free-air temperature, TA 0 70 °C 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

uA9638C DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER SLLS112C − OCTOBER 1980 − REVISED APRIL 1994 electrical characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VIK Input clamp voltage VCC = 4.75 V, II = −18 mA −1 −1.2 V VVOH HHiigghh-lleevveell oouuttppuutt vvoollttaaggee VVVCCILCC = == 0 44.8..77 V55 VV,, VVIIHH == 22 VV,, IIOOHH == −−1400 mmAA 2.25 3.5 VV VVOL LLooww-lleevveell oouuttppuutt vvoollttaaggee VVIOCCLCC = == 4 440.. 77m55A VV,, VVIIHH == 22 VV,, VVIILL == 00..88 VV,, 00.55 VV |VOD1| Magnitude of differential output voltage VCC = 5.25 V, IO = 0 2VOD2 V |VOD2| Magnitude of differential output voltage 2 V CChhaannggee iinn mmaaggnniittuuddee ooff ddiiffffeerreennttiiaall ΔΔ||VVOD|| output voltage‡ VVCCCC == 44..7755 VV ttoo 55..2255 VV,, RRLL == 110000 ΩΩ,, ±±00.44 VV VOC Common-mode output voltage§ See Figure 1 3 V CChhaannggee iinn mmaaggnniittuuddee ooff ccoommmmoonn--mmooddee ΔΔ||VVOC|| output voltage‡ ±±00.44 VV VO = 6 V 0.1 100 IIOO OOuuttppuutt ccuurrrreenntt wwiitthh ppoowweerr ooffff VVCCCC = 00 VO = − 0.25 V −0.1 −100 μμAA VO = − 0.25 V to 6 V ±100 II Input current VCC = 5.25 V, VI = 5.5 V 50 μA IIH High-level input current VCC = 5.25 V, VI = 2.7 V 25 μA IIL Low-level input current VCC = 5.25 V, VI = 0.5 V −200 μA IOS Short-circuit output current¶ VCC = 5.25 V, VO = 0 −50 −150 mA ICC Supply current (both drivers) VCC = 5.25 V, No load, All inputs at 0 V 45 65 mA †All typical values are at VCC = 5 V and TA = 25°C. ‡Δ| VOD | and Δ| VOC | are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low level or vice versa. §In Standard EIA-422-A, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage, VOS. ¶Only one output at a time should be shorted, and duration of the short circuit should not exceed one second. switching characteristics, V = 5 V, T = 25°C CC A PARAMETER TEST CONDITIONS MIN TYP MAX UNIT td(OD) Differential output delay time 10 20 ns tt(OD) Differential output transition time CCL = 1155 ppFF, RRL = 110000 ΩΩ, SSeeee FFiigguurree 22 10 20 ns tsk(o) Output skew See Figure 2 1 ns POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3

uA9638C DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER SLLS112C − OCTOBER 1980 − REVISED APRIL 1994 PARAMETER MEASUREMENT INFORMATION 50 Ω Input VOD2 50 Ω VOC Figure 1. Differential and Common-Mode Output Voltages 3 V Input 1.5 V 1.5 V 0 V Y Output td(OD) td(OD) Differential 90% 90% CL Output 10% 10% RL = 100 Ω Generator tt(OD) tt(OD) (see Note A) 50 Ω Z Output VOH CL = 15 pF Y Output 50% 50% (see Note B) VOL tsk(o) tsk(o) VOH Z Output 50% 50% VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The input pulse generator has the following characteristics: ZO = 50 Ω, PRR ≤ 500 kHz, tw = 100 ns, tr = ≤ 5 ns. B. CL includes probe and jig capacitance. Figure 2. Test Circuit and Voltage Waveforms 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 PACKAGING INFORMATION Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples (1) Drawing Qty (2) (6) (3) (4/5) UA9638CD ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-2-260C-1 YEAR 0 to 70 9638C & no Sb/Br) UA9638CDE4 ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-2-260C-1 YEAR 0 to 70 9638C & no Sb/Br) UA9638CDR ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-2-260C-1 YEAR 0 to 70 9638C & no Sb/Br) UA9638CDRG4 ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-2-260C-1 YEAR 0 to 70 9638C & no Sb/Br) UA9638CP ACTIVE PDIP P 8 50 Green (RoHS NIPDAU N / A for Pkg Type 0 to 70 UA9638CP & no Sb/Br) UA9638CPE4 ACTIVE PDIP P 8 50 Green (RoHS NIPDAU N / A for Pkg Type 0 to 70 UA9638CP & no Sb/Br) (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 <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. 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 2

PACKAGE MATERIALS INFORMATION www.ti.com 19-Mar-2008 TAPE AND REEL INFORMATION *Alldimensionsarenominal Device Package Package Pins SPQ Reel Reel A0(mm) B0(mm) K0(mm) P1 W Pin1 Type Drawing Diameter Width (mm) (mm) Quadrant (mm) W1(mm) UA9638CDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 19-Mar-2008 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) UA9638CDR SOIC D 8 2500 340.5 338.1 20.6 PackMaterials-Page2

PACKAGE OUTLINE D0008A SOIC - 1.75 mm max height SCALE 2.800 SMALL OUTLINE INTEGRATED CIRCUIT C SEATING PLANE .228-.244 TYP [5.80-6.19] .004 [0.1] C A PIN 1 ID AREA 6X .050 [1.27] 8 1 2X .189-.197 [4.81-5.00] .150 NOTE 3 [3.81] 4X (0 -15 ) 4 5 8X .012-.020 B .150-.157 [0.31-0.51] .069 MAX [3.81-3.98] .010 [0.25] C A B [1.75] NOTE 4 .005-.010 TYP [0.13-0.25] 4X (0 -15 ) SEE DETAIL A .010 [0.25] .004-.010 0 - 8 [0.11-0.25] .016-.050 [0.41-1.27] DETAIL A (.041) TYPICAL [1.04] 4214825/C 02/2019 NOTES: 1. Linear dimensions are in inches [millimeters]. Dimensions in parenthesis are for reference only. Controlling dimensions are in inches. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed .006 [0.15] per side. 4. This dimension does not include interlead flash. 5. Reference JEDEC registration MS-012, variation AA. www.ti.com

EXAMPLE BOARD LAYOUT D0008A SOIC - 1.75 mm max height SMALL OUTLINE INTEGRATED CIRCUIT 8X (.061 ) [1.55] SYMM SEE DETAILS 1 8 8X (.024) [0.6] SYMM (R.002 ) TYP [0.05] 5 4 6X (.050 ) [1.27] (.213) [5.4] LAND PATTERN EXAMPLE EXPOSED METAL SHOWN SCALE:8X SOLDER MASK SOLDER MASK METAL OPENING OPENING METAL UNDER SOLDER MASK EXPOSED METAL EXPOSED METAL .0028 MAX .0028 MIN [0.07] [0.07] ALL AROUND ALL AROUND NON SOLDER MASK SOLDER MASK DEFINED DEFINED SOLDER MASK DETAILS 4214825/C 02/2019 NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site. www.ti.com

EXAMPLE STENCIL DESIGN D0008A SOIC - 1.75 mm max height SMALL OUTLINE INTEGRATED CIRCUIT 8X (.061 ) [1.55] SYMM 1 8 8X (.024) [0.6] SYMM (R.002 ) TYP [0.05] 5 4 6X (.050 ) [1.27] (.213) [5.4] SOLDER PASTE EXAMPLE BASED ON .005 INCH [0.125 MM] THICK STENCIL SCALE:8X 4214825/C 02/2019 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design. www.ti.com

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