Ordering number : EN5693 Monolithic Linear IC LA7642N SECAM Format Color TV Chrominance Circuit Overview Package Dimensions The LA7642N integrates the chrominance circuit for a SECAM format TV in a single 16-pin DIP (300 mil) package and provides an adjustment-free discriminator circuit. In combination with the Sanyo LA7687, LA7688, this IC can implement a multi-format color TV signalprocessing system. unit: mm 3006B-DIP16 [LA7642N] Features • Adjustment-free discriminator circuit • On-chip bell filter SANYO: DIP16 Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings VCC max Allowable power dissipation Pd max Unit 9 Ta ≤ 65°C V 400 mW Operating temperature Topr –10 to +65 °C Storage temperature Tstg –55 to +125 °C Ratings Unit Operating Conditions at Ta = 25°C Parameter Recommended operating voltage Operating voltage range Symbol Conditions VCC VCC op 7.8 V 7.0 to 8.5 V Operating Characteristics at Ta = 25°C, VCC = 7.8 V, with pin 13 pulled up to VCC through a 20-kΩ resistor Parameter Symbol Conditions ICC Chrominance system. Measure the current flowing into pin 15; With no signal applied to pin 14. Ratings min typ max Unit [Circuit Voltage and Current] Circuit current 28 35 42 mA [Filter Block] Input impedance The pin 14 input impedance. For reference only (design value) 15 kΩ Continued on next page. SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 73097HA(OT) No. 5693-1/6 LA7642N Continued from preceding page. Parameter Symbol Conditions Ratings min typ Unit max Bell filter frequency characteristics 4.086 MHz Referenced to 4.286 MHz. For reference only. EQU = off. Input a 20 mV p-p, f = 4.286 MHz CW signal to pin 14 and, measure the pin 16 output BEL4.086 (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.086 MHz and measure the pin 16 output (f = 4.086 MHz) and calculate the frequency characteristics. –9 –6 –3 dB Bell filter frequency characteristics 4.486 MHz Referenced to 4.286 MHz. For reference only. EQU = off. Input a 20 mV p-p, f = 4.286 MHz CW signal to pin 14 and, measure the pin 16 output BEL4.486 (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.486 MHz and measure the pin 16 output (f = 4.486 MHz) and calculate the frequency characteristics. –5 –2 –0.5 dB EQU frequency characteristics 4.086 MHz Referenced to 4.286 MHz. For reference only. EQU = on. Input a 20 mV p-p, f = 4.286 MHz CW signal to pin 14 and, measure the pin 16 output EQU4.086 (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.086 MHz and measure the pin 16 output (f = 4.086 MHz) and calculate the frequency characteristics. –10.5 –7.5 –4.5 dB EQU frequency characteristics 4.486 MHz Referenced to 4.286 MHz. For reference only. EQU = on. Input a 20 mV p-p, f = 4.286 MHz CW signal to pin 14 and measure the pin 16 output EQU4.486 (f = 4.286 MHz). Next, input a CW of 20 mV p-p, f = 4.486 MHz and measure the pin 16 output (f = 4.486 MHz) and calculate the frequency characteristics. –3 0 +3 dB –50 0 +50 kHz Bell filter frequency deviation from center frequency BELF0 Referenced to 4.35 MHz. For reference only. EQU = off. Input a 20 mV p-p CW signal to pin 14 and modify the frequency of that signal. Measure the deviation from 4.35 MHz of the frequency (the center frequency) for which the pin 16 output is maximized. Bell filter gain difference at f0 ±500 kHz BELdG Referenced to 4.35 MHz. For reference only. EQU = off. Measure the gain at the BELF0 ±500 kHz, and calculate the difference. –1 0 +1 dB Killer operating point KILL Let 0 dB = 200 mV p-p. Input a color bar signal to pin 14 and gradually lower the input signal level. Measure the input level at the point the pin 13 DC voltage falls below 1/2* VCC. –42 –36 –33 dB B-Y output amplitude VBY The pin 7 B-Y amplitude for a color bar signal. Let 0 dB = 200 mV p-p. Input a color bar signal (0 dB) to pin 14, and measure the B-Y amplitude at pin 7. 0.60 0.75 0.90 Vp-p R-Y output amplitude VRY The pin 6 R-Y amplitude for a color bar signal. Let 0 dB = 200 mV p-p. Input a color bar signal (0 dB) to pin 14, and measure the R-Y amplitude at pin 6. 0.74 0.92 1.10 Vp-p R-Y/B-Y output ratio RATRB VRY/VBY. Calculate the ratio of the values measured above. RATRB = VRY/VBY 1.1 1.23 1.35 LINBY Input a color bar signal (0 dB) to pin 14. In the pin 7 (B-Y) output waveform measure the amplitude of the blue (+230 kHz) and yellow (–230 kHz) components (A) and measure the amplitude of the blue green (+78 kHz) and red (–78 kHz) components (B). Calculate the value of LINBY from the following formula. LINBY = (A/B) × (156/460) × 100 (%) 85 100 115 [Chrominance Block] B-Y linearity % Continued on next page. No. 5693-2/6 LA7642N Continued from preceding page. Parameter Symbol Conditions R-Y linearity LINRY Input a color bar signal (0 dB) to pin 14. In the pin 6 (R-Y) output waveform measure the amplitude of the blue green (+280 kHz) and red (–280 kHz) components (A) and measure the amplitude of the blue (+45 kHz) and yellow (–45 kHz) components (B). Calculate the value of LINRY from the following formula. LINRY = (A/B) × (90/560) × 100 (%) ALC pulse height VALC Blanking period B-Y DC voltage Blanking period R-Y DC voltage SECAM output impedance: B-Y SECAM output impedance: R-Y Output impedance Non-SECAM: B-Y Output impedance Non-SECAM: R-Y Black level error B-Y Black level error R-Y Ratings min typ Unit max 85 100 115 % Measure the peak value of the pin 7 ALC pulse signal. Referenced to the blanking period DC level. 180 200 220 mVp-p VALC The pin 7 blanking period DC level. 3.8 4.1 4.4 V VRYBLK The pin 6 blanking period DC level. 3.8 4.1 4.4 V ZBYS The pin 7 output impedance. For reference only. Input a color bar signal (0 dB) to pin 14 and measure the pin 7 B-Y amplitude Vb (V p-p). Next, connect a 2-kΩ resistor between pin 7 and ground and measure the pin 7 B-Y amplitude Vwrb (V p-p). Derive ZBYS from the following formula. ZBYS = (Vb – Vwrb)/Vwrb × 2k (Ω). 150 Ω ZRYS The pin 6 output impedance. For reference only. Input a color bar signal (0 dB) to pin 14 and measure the pin 6 R-Y amplitude Vr (V p-p). Next, connect a 2-kΩ resistor between pin 6 and ground and measure the pin 6 R-Y amplitude Vwrr (V p-p). Derive ZRYS from the following formula. ZRYS = (Vr – Vwrr)/Vwrr × 2k (Ω). 150 Ω ZBY The pin 7 output impedance. For reference only. Apply a 4-V signal to pin 7 (B-Y), measure the influx current Ib, and derive ZBY from the following formula. ZBY = 4/Ib (MΩ) 10 MΩ ZRY The pin 6 output impedance. For reference only. Apply a 4-V signal to pin 6 (R-Y), measure the influx current Ir, and derive ZRY from the following formula. ZRY = 4/Ir (MΩ) 10 MΩ BBBY The DC difference between the pin 7 no signal period DC level and the signal period DC level for a black-and-white signal. Measure DBY (V) and calculate BBBY from the following formula. BBBY = DBY × 460/VBY kHz –5 0 +5 kHz BBRY The DC difference between the pin 6 no signal period DC level and the signal period DC level for a black-and-white signal. Measure DRY (V) and calculate BBRY from the following formula. BBRY = DRY × 460/VRY kHz –5 0 +5 kHz DE63B Input a signal to which a 63-kHz modulation has been applied to pin 14 and measure the pin 7 B-Y amplitude Vbon (V p-p) when preemphasis is on. Next, turn off preemphasis, measure the pin 7 B-Y amplitude Vboff (V p-p), and calculate DE63B from the following formula. DE63B = 20 × log (Vboff/Vbon) (dB) –1.0 –2.6 –4.0 dB [De-Emphasis Characteristics] De-emphasis 63k B-Y Continued on next page. No. 5693-3/6 LA7642N Continued from preceding page. Parameter De-emphasis 63k R-Y De-emphasis 250k B-Y De-emphasis 250k R-Y Ratings Symbol Conditions DE63R Input a signal to which a 63-kHz modulation has been applied to pin 14 and measure the pin 6 R-Y amplitude Vron (V p-p) when preemphasis is on. Next, turn off preemphasis, measure the pin 6 R-Y amplitude Vroff (V p-p), and calculate DE63R from the following formula. DE63R = 20 × log (Vroff/Vron) (dB) –1.0 –2.6 –4.0 dB DE250B Input a signal to which a 250-kHz modulation has been applied to pin 14 and measure the pin 7 B-Y amplitude Vbon (V p-p) when preemphasis is on. Next, turn off preemphasis, measure the pin 7 B-Y amplitude Vboff (V p-p), and calculate DE250B from the following formula. DE250B = 20 × log (Vboff/Vbon) (dB) –4.5 –7.0 –9.5 dB DE250R Input a signal to which a 250-kHz modulation has been applied to pin 14 and measure the pin 6 R-Y amplitude Vron (V p-p) when preemphasis is on. Next, turn off preemphasis, measure the pin 6 R-Y amplitude Vroff (V p-p), and calculate DE250R from the following formula. DE250R = 20 × log (Vroff/Vron) (dB) –6.5 –9.0 –11.5 dB VBLK Apply at least 16 pulses with an amplitude of 0 V to VCC and then take the following measurement. Apply a DC voltage to pin 10 and slowly increase this voltage starting at 0 V. Measure the DC voltage applied to pin at the point the pin 3 DC voltage exceeds 3 V. 1.0 1.3 1.6 V HBLK Apply at least 16 pulses with an amplitude of 0 V to VCC and then take the following measurement. Apply a pulse signal with a 12-µs high period and a 52-µs low period (for a 64-µs cycle) and slowly increase the amplitude of that signal starting at 0. Measure the wave height of that pulse signal at the point the pin 7 (B-Y) DC voltage exceeds VBYBLK + 100 mV. 2.5 3.0 3.5 V BGP Apply at least 16 pulses with an amplitude of 0 V to VCC and then take the following measurement. Apply a pulse signal with a 12-µs high period and a 52-µs low period (for a 64-µs cycle) and slowly increase the amplitude of that signal starting at 0. Measure the wave height of that pulse signal at the point the pin 4 (IDF) DC voltage becomes higher than it was at the point the pulse signal wave height was 0. 4.5 5.0 5.5 V min typ Unit max [Sandcastle Pulse] V threshold voltage H threshold voltage BGP threshold voltage [System Switching] SECAM threshold voltage 1 Slowly increase the pin 12 DC voltage from SESWLO 0 V and measure that voltage at the point the mode switches to a non-SECAM mode. 1.0 1.3 1.6 V SECAM threshold voltage 2 SESWHI Slowly increase the pin 12 DC voltage from 3 V and measure that voltage at the point the mode switches to SECAM mode. 3.6 3.9 4.3 V Killer on output level VKILON Measure the pin 13 voltage when the killer circuit is on. 0.0 0.2 0.5 V Killer off output level VKILOF Measure the pin 13 voltage when the killer circuit is off. 7.3 7.8 7.8 V V5DS4 Measure the variation in the pin 5 DC voltage when the 4.00-MHz input level is changed from 200 mV p-p to 100 mV p-p. –50 0 +50 mV [Killer Output: Pin 13] [Reference Frequency Input Block] 4.00-MHz input level variations 1 No. 5693-4/6 LA7642N Continued from preceding page. Parameter Ratings Symbol Conditions 4.00-MHz input level variations 2 V5DB4 Measure the variation in the pin 5 DC voltage when the 4.00-MHz input level is changed from 200 mV p-p to 300 mV p-p. –50 0 +50 mV 4.43-MHz input level variations 1 V3DS44 Measure the variation in the pin 3 DC voltage when the 4.43-MHz input level is changed from 200 mV p-p to 100 mV p-p. –50 0 +50 mV 4.43-MHz input level variations 2 V3DB44 Measure the variation in the pin 3 DC voltage when the 4.43-MHz input level is changed from 200 mV p-p to 300 mV p-p. –50 0 +50 mV min typ Unit max 4.00-MHz input impedance Z9 The pin 9 input impedance. For reference only (design value) 15 kΩ 4.43-MHz input impedance Z11 The pin 11 input impedance. For reference only (design value) 15 kΩ [VCC Dependency] ALC pulse wave height dVALC The percentage change in the ALC pulse peak value when VCC changes by 1 V. Measure the ALC pulse peak value when VCC = 9 V and record this value as VALC9. Calculate dVALC from the following formula. (VALC9 – VALC)/1.2/VALC × 100 (%) 10 15 20 % Notes: EQU = off: Pull pin 16 to ground through a 4.7-kΩ resistor. EQU = on: Leave pin 16 open. Block Diagram No. 5693-5/6 LA7642N ■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. ■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 1997. Specifications and information herein are subject to change without notice. No. 5693-6/6