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LA7356 Dataheets PDF



Part Number LA7356
Manufacturers Sanyo
Logo Sanyo
Description Monolithic Linear IC
Datasheet LA7356 DatasheetLA7356 Datasheet (PDF)

Ordering number : EN4832B Monolithic Linear IC LA7356, LA7356M For Use in VCR Products PAL/SECAM (MESECAM) Discrimination IC Overview The LA7356 and LA7356M are PAL/SECAM discrimination ICs. Since these products do not require external circuits such as ceramic filters and tank resonators, the number of external components is reduced. Thus they allow the discriminator block to be implemented in a smaller space and at a lower cost. Functions • Burst/CW switching • Limit amplifier • Frequency - p.

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Ordering number : EN4832B Monolithic Linear IC LA7356, LA7356M For Use in VCR Products PAL/SECAM (MESECAM) Discrimination IC Overview The LA7356 and LA7356M are PAL/SECAM discrimination ICs. Since these products do not require external circuits such as ceramic filters and tank resonators, the number of external components is reduced. Thus they allow the discriminator block to be implemented in a smaller space and at a lower cost. Functions • Burst/CW switching • Limit amplifier • Frequency - phase conversion • Phase comparator • Comparator Features • These products enable the implementation of discrimination circuits with high sensitivity even with weak signals or with strong burst input levels. • Ceramic capacitors are the only required external components when used in conjunction with the Sanyo LA7430 and LA7435. In particular, ceramic filters and tank circuits are not required. • Completely adjustment-free • Low power dissipation • Compact package Package Dimensions unit: mm 3098B-DIP10S [LA7356] unit: mm 3086A-MFP10S [LA7356M] SANYO: DIP10S Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ta ≤ +65°C SANYO: MFP10S Ratings 7.0 120 –10 to +65 –40 to +125 Unit V mW °C °C SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 33195TH (OT)/61594TH No. 4832-1/6 LA7356, 7356M Operating Conditions at Ta = 25°C Parameter Supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Operating Characteristics at Ta = 25°C, VCC = 5 V Parameter Quiescent current (1) Quiescent current (2) BGP threshold level SYNC threshold level Input limit amplifier gain Input limit amplifier limit level Comparator hysteresis voltage H Comparator hysteresis voltage L DET-OUT output voltage (H) DET-OUT output voltage (L) Symbol Conditions ICC1 ICC2 BTH STH LIMG LIMD CompH CompL DETH DETL Pin 5 = GND, Pin 7: input current, Output: T4 Pin 5 = VCC, Pin 7: input current, Output: T4 Slowly increase the DC voltage applied to pin 5 starting at 0 V. The pin 5 voltage input signal when a signal appears on pin 2 is 300 mV p-p. Output: T2 Slowly increase the DC voltage applied to pin 5 starting at 0 V. The pin 5 voltage input signal when a signal appears on pin 2 is 300 mV p-p. Output: T2 Defined as the output ratio when a 10 mVp-p amplitude sine wave is input to pin 1. Output: T2 Observe the output amplitude when a 300 mVp-p amplitude sine wave is input to pin 1. Output: T2 The V1 voltage when T1 goes from low to high when the voltage on V1 is gradually raised from 0 V. Output: T1 The V1 voltage when T1 goes from high to low when the voltage on V1 is gradually lowered from 5 V. Output: T1 With a 2 kΩ load resistance. Output: T1 With a 2 kΩ load resistance. Output: T1 Ratings 5.0 4.8 to 5.2 Unit V V Ratings Unit min typ max 7.0 10.0 13.0 mA 7.5 10.5 13.5 mA 2.2 2.5 2.8 V 0.6 0.8 9 12 150 190 2.7 3.0 2.0 2.3 3.6 4.0 0 0.2 1.0 V 15 dB 230 mVp-p 3.3 V 2.6 V 4.4 V 0.4 V Switch Conditions Symbol ICC1 ICC2 BTH Input signal S1 S2 No signal No signal No signal No signal Sig. 1 No signal STH LIMG LIMD Comp H No signal Sig. 1 Sig. 1 No signal Sig. 1 No signal No signal No signal Comp L DET H DET L No signal Sig. 2 Sig. 3 No signal Sig. 1 Sig. 1 Input pulse S3 S4 0V 0V 5V 5V 0V 0V 0V 5V 5V No signal 0V 0V 0V No signal No signal P2 P2 No signal P1 P1 Applied voltage V1 V2 DC, variable DC, variable DC, variable DC, variable SW1 OFF OFF ON ON ON ON OFF OFF OFF OFF SW2 OFF OFF OFF OFF OFF OFF ON ON OFF OFF Switch SW3 OFF OFF ON ON OFF OFF OFF OFF OFF OFF SW4 OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF SW5 OFF OFF OFF OFF OFF ON ON ON ON ON No. 4832-2/6 LA7356, 7356M Pin Assignment and Equivalent Circuit Block Diagram Pin Functions Pin No. Symbol 1 CHROMA-IN Equivalent I/O circuit Unit (resistance: Ω, capacitance: F) Function This is the chroma signal input pin. It can handle burst signals (an unmodulated carrier for SECAM signals) with an amplitude of between about 50 and 800 mV p-p. 2 HPF. MONI 3 FILTER 4 GND HPF output monitor This pin should be connected to VCC in normal operation to avoid interference between pins 1 and 3. Phase comparator output The output is smoothed with a capacitor. The smoothed output level will be 2.0 V or lower for PAL, and 3.5 V or higher for SECAM or MESECAM. Continued on next page. No. 4832-3/6 Continued from preceding page. Pin No. Symbol 5 SYNC + BGP LA7356, 7356M Equivalent I/O circuit Function Input for the BGP + SYNC signal The input level is 1.0 to 2.0 V during the SYNC period ( ) and 3.0 to 4.5 V during the BGP period. Note that when used in conjunction with Sanyo LA7430 and LA7435 single-chip Y/C products, the external circuit connected to pin 5 is unnecessary since those single-chip circuits output a combine.


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