SN28838 PAL-COLOR SUBCARRIER GENERATOR SOCS029B – AUGUST 1991 • • NS PACKAGE (TOP VIEW) Solid-State Reliability Surface-Mount Package GND VDD1 PD LSW VCC GND CLK13M VDD2 description The SN28838 is a monolithic integrated circuit designed to interface with the SN28837 PALtiming generator in order to generate the PAL-color timing signals. It receives inputs from the SN28837 and a 17-MHz oscillator and outputs the PAL-color subcarrier, color subcarrier delayed by 90 degrees, and burst-color-subcarrier signals, which are all 4.43-MHz outputs. 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 X1 X2 VCC LOCK PLLFIL BSC SC(90) SC The SN28838 is supplied in a 16-pin surfacemount package and is characterized for operation from 0°C to 40°C. logic symbol PAL CLR SUBCARR GEN SN28838 LSW PD LSW CLK13M X2 X1 3 4 7 15 16 H L SC (90) BSC SC – 90° SC – 90° SC + 90° SC + 180° Pwr Dwn Phase Del Clock Lock Xtal 13 LOCK Xtal G SC G SC (90) G BSC 9 10 11 SC SC (90) BSC This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C, Method 3015; however, precautions should be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriate logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies available from Texas Instruments. Copyright 1991, 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 4-1 SN28838 PAL-COLOR SUBCARRIER GENERATOR SOCS029B – AUGUST 1991 Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION BSC 11 O Burst subcarrier CLK13M 7 I 13.34-MHz clock from SN28837 GND 1 GND 6 LOCK 13 O PLL lock signal. LOCK is high when the phase-locked loop is locked. LSW 4 I Line switch (from SN28837) PD 3 I Power down PLLFIL 12 Ground Ground Terminal for PLL filter SC 9 O Subcarrier SC(90) VCC† 10 O Subcarrier 90° out of phase 5 Power supply voltage VCC† VDD1 14 Power supply voltage 2 Power supply voltage for X1 8 Power supply voltage for CLK13M VDD2 X1 16 Crystal oscillator X2 15 † These two terminals should be connected together externally. 0° 0° SC LSW SC – 90° SC + 90° SC(90) SC – 90° SC + 180° BSC Figure 1. SC, SC(90), and BSC Timing 4-2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN28838 PAL-COLOR SUBCARRIER GENERATOR SOCS029B – AUGUST 1991 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V Input voltage range, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to VCC + 0.3 V Output voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to VCC + 0.3 V Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30°C to 75°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mW † 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 the GND terminal. recommended operating conditions Supply voltage, VCC MIN NOM MAX 4.5 5 5.5 VCC × 0.7 High-level input voltage, VIH 0.8 V 17.735 MHz 300 µs Power-up time Operating free-air temperature, TA V V Low-level input voltage, VIL Operating frequency UNIT – 20 45 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VOH VOL High-level output voltage IIH IIL High-level input current (except X1)‡ Low-level output voltage TEST CONDITIONS BSC SC BSC, SC, SC(90) IOH = – 2 mA TYP MAX 3.5 – 30 BSC, SC, SC(90) – 200 0.5 V 100 nA – 370 4.43 ICC Supply current ‡ All inputs except X1 have pullup current sources. UNIT V IOL = 2 mA VI = 5 V VI = 0 Low-level input current Output frequency VCC = 4.5 V, VCC = 4.5 V, MIN µA MHz 5 20 TYP MAX mA switching characteristics PARAMETER tr tf Rise time Fall time TEST CONDITIONS CL = 50 pF POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN UNIT 50 ns 50 ns 4-3 SN28838 PAL-COLOR SUBCARRIER GENERATOR SOCS029B – AUGUST 1991 MECHANICAL DATA NS/R-PDSO-G** PLASTIC SMALL-OUTLINE PACKAGE 16 PIN SHOWN A 16 9 PINS** 14 16 20 24 A MAX 10,50 10,50 12,90 15,30 A MIN 9,90 9,90 12,30 14,70 DIM 8,20 7,40 5,60 5,00 1 8 2,00 MAX Seating Plane 0,10 0,05 MIN 1,27 0°– 10° 0,40 0,20 0,10 1,05 0,55 0,25 M 4040062/A–10/93 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion not to exceed 0,15. 4-4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. 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