NXP Semiconductors SAA7103H/V4,518

Overview

SAA7103H/V4,518 from NXP Semiconductors (formerly Philips Semiconductors) is a monolithic CMOS digital video encoder IC that converts PC graphics data up to 800 × 600 @ 60 Hz into analog PAL/NTSC CVBS, S-video, or RGB-SCART outputs. It integrates a programmable scaler, anti-flicker filter, triple 10-bit DACs, on-chip 27 MHz crystal oscillator, and I²C-bus control interface - enabling flicker-free TV display with underscan control and hardware cursor overlay in embedded PC-to-TV video interface applications.

For engineers reviewing the SAA7103H/V4,518 datasheet, SAA7103H/V4,518 pinout, SAA7103H/V4,518 application, or SAA7103H/V4,518 equivalent, this page delivers verified technical context, exact QFP44 pin mapping, real-world use cases for PC graphics encoding, and validated alternative options for legacy video interface design.

Technical Context

The SAA7103H/V4,518 implements a dual-path video processing architecture: one path processes non-interlaced RGB or 4:2:2 Y-CB-CR input through horizontal/vertical scalers and anti-flicker filtering before NTSC/PAL encoding; the other bypasses scaling to deliver auxiliary VGA RGB output at ≤45 MHz pixel clock. Its 27 MHz crystal-stable subcarrier generation ensures precise 13.5 MHz color burst timing compliant with ITU-R BT.470-3 and RS-170-A standards.

All three 10-bit DACs operate at 27 MHz sample rate with independent reference current control (via RSET and DUMP pins), supporting simultaneous CVBS (BLUE/CB/CVBS, GREEN/VBS/CVBS, RED/CR/C), TTL composite sync, and non-interlaced RGB outputs. The device supports double-edge clocking for 16-bit 4:2:2 input, programmable sync phase alignment, and optional VBI data insertion including teletext (line 23), VPS (line 16), and closed caption (line 21).

Key Specifications

Pinout & Package

Package: Plastic Quad Flat Package (QFP44), 10 × 10 × 1.75 mm body, 44 leads, SOT307-2 footprint. Compatible with SAA7102H but not pin-compatible with LBGA156 variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital video encoder applications.

Compared with SAA7102H, the SAA7103H/V4,518 adds Macrovision 7.01 support for pay-per-view content; compared with ADV7170KSTZ, it delivers full feature integration - eliminating external components for scaling, RGB output, and VBI data insertion - reducing BOM count and layout complexity.

Availability

SAA7103H/V4,518 is available at Aetrix Electronics and suitable for PC-to-TV interface modules, legacy graphics adapter upgrades, auxiliary VGA output paths, teletext-enabled broadcast encoders, and industrial HMI video subsystems requiring stable component supply across extended product lifecycles.

Supply support for SAA7103H/V4,518 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance analog and mixed-signal ICs for automotive, industrial, and consumer applications.

The SAA7103H/V4,518 belongs to NXP's legacy video interface product line, designed specifically for bridging PC graphics architectures to analog TV standards with integrated timing, scaling, and broadcast-compliant VBI encoding.

FAQ

What video standards does the SAA7103H/V4,518 support?

The SAA7103H/V4,518 supports NTSC M and PAL B/G analog video standards with crystal-stable 13.5 MHz subcarrier generation. It complies with RS-170-A and ITU-R BT.470-3 luminance/chrominance filtering requirements and enables flicker-free interlaced display via its programmable vertical scaler and anti-flicker filter. The SAA7103H/V4,518 does not support SECAM or digital broadcast standards like HDMI or DVI.

Does the SAA7103H/V4,518 require an external crystal?

Yes - the SAA7103H/V4,518 requires a 27 MHz crystal connected between XTALI and XTALO pins. It supports both fundamental-mode and 3rd-harmonic crystals, and the on-chip oscillator eliminates the need for external clock generation circuitry. No external PLL or frequency synthesizer is required, as all internal clocks - including pixel clock synthesis - derive from this crystal source.

Can the SAA7103H/V4,518 drive both CVBS and RGB outputs simultaneously?

Yes - the SAA7103H/V4,518 drives CVBS (composite), S-video (Y/C), and RGB outputs concurrently via its three independent 10-bit DACs. BLUE_CB_CVBS, GREEN_VBS_CVBS, and RED_CR_C pins provide analog outputs that can be routed to separate connectors (e.g., RCA for CVBS, SCART for RGB). All outputs share the same 27 MHz sampling clock and exhibit matched group delay for synchronized display.

How is the hardware cursor configured on the SAA7103H/V4,518?

The SAA7103H/V4,518 supports a 32 × 32 pixel hardware cursor with programmable colors and hot-spot positioning. Cursor bitmap data (256 bytes, 2 bits per pixel) is loaded either via I²C-bus write to dedicated registers or embedded in the pixel data stream two lines before the first active line. Cursor position, transparency mode (CMODE), and color registers are fully configurable through the I²C interface without CPU intervention during operation.

Is the SAA7103H/V4,518 pin-compatible with the SAA7102H?

Yes - the SAA7103H/V4,518 and SAA7102H share identical QFP44 packaging (SOT307-2), pinout, and electrical interface. They differ only in firmware-level Macrovision support: SAA7103H/V4,518 includes Macrovision Pay-per-View copy protection rev. 7.01, while SAA7102H does not. All register maps, timing diagrams, and application circuits remain functionally interchangeable for non-Macrovision use cases.