SAA7121H

Product Summary

The SAA7121H Digital video encoder encodes digital YUV video data to an NTSC or PAL CVBS or S-video signal. The circuit accepts CCIR compatible YUV data with 720 active pixels per line in 4 : 2 : 2 multiplexed formats, for example MPEG decoded data. The SAA7121H includes a sync/clock generator and on-chip DACs.

Parametrics

SAA7121H characteristics: (1)VDDA, analog supply voltage: 3.1 to 3.5 V; (2)VDDD, digital supply voltage: 3.0 to 3.6 V; (3)IDDA, analog supply current: 62 mA max; (4)IDDD, digital supply current VDDD = 3.3 V: 45 mA max; (5)VIL, LOW-level input voltage: -0.5 to +0.8 V; (6)VIH, HIGH-level input voltage: 2.0 to VDDD + 0.3 V; (7)ILI, input leakage current: 1 mA max; (8)Ci, input capacitance: clocks: 10 pF; data: 8 pF; I/Os at high-impedance: 8 pF; (9)VOL, LOW-level output voltage at IOL = 2 mA: 0.4 V max; (10)VOH, HIGH-level output voltage at IOH = -2 mA: 2.4 V min.

Features

SAA7121H features: (1)Monolithic CMOS 3.3 V device; (2)Digital PAL/NTSC encoder; (3)System pixel frequency 13.5 MHz; (4)Accepts MPEG decoded data on 8-bit wide input port; input data format CB-Y-CR (CCIR 656); (5)Three Digital-to-Analog Converters (DACs) for Y, C and CVBS two times oversampled with 10-bit resolution; (6)Real-time control of subcarrier; (7)Cross-colour reduction filter; (8)Closed captioning encoding and World Standard Teletext (WST) and North-merican Broadcast Text System (NABTS) teletext encoding including sequencer and filter; (9)Line 23 Wide Screen Signalling (WSS) encoding; (10)Fast I2C-bus control port (400 kHz); (11)Encoder can be master or slave; (12)Programmable horizontal and vertical input synchronization phase; (13)Programmable horizontal sync output phase; (14)Internal Colour Bar Generator (CBG); (15)2 ×2 bytes in lines 20 (NTSC) for copy guard management system can be loaded via I2C-bus; (16)Down mode of DACs; (17)Controlled rise/fall times of synchronization and blanking output signals; (18)Macrovision Pay-per-View copy protection system rev. 7.01 and rev. 6.1 as option; (19)QFP44 package.

Diagrams