NXP Semiconductors SAA7103H/V4,557

Overview

SAA7103H/V4,557 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 PAL/NTSC CVBS, S-video, or RGB-SCART analog outputs. It integrates a programmable scaler, anti-flicker filter, three 10-bit DACs, on-chip 27 MHz crystal oscillator, and I²C-bus control interface. Used in embedded PC-to-TV video interface cards and set-top box auxiliary display subsystems.

For engineers reviewing the SAA7103H/V4,557 datasheet, SAA7103H/V4,557 pinout, SAA7103H/V4,557 application, or SAA7103H/V4,557 equivalent, key selection criteria include its 10-bit DAC resolution, 45 MHz max pixel clock support, QFP44 package compatibility, NTSC/PAL subcarrier generation, and hardware cursor capability for overlay rendering.

Technical Context

The SAA7103H/V4,557 implements a dual-path video processing architecture: one path processes non-interlaced RGB or Y-CB-CR input through horizontal/vertical scalers and anti-flicker filtering before encoding to interlaced CVBS/S-video; the other bypasses scaling to deliver auxiliary non-interlaced RGB output at up to 45 MHz pixel clock. Its encoder core synthesizes crystal-stable 13.5 MHz color subcarrier and generates sync signals compliant with RS-170-A and ITU-R BT.470-3.

Internal signal domains operate at distinct clock rates: PIXCLK (up to 45 MHz) governs input timing and FIFO write, while 27 MHz XTAL clocks the DACs, encoder, and I²C interface. The triple DAC uses separate reference pins (RSET, DUMP) and supports 10-bit full-scale analog outputs - CVBS, GREEN_VBS_CVBS, BLUE_CB_CVBS, RED_CR_C - each with ±3 LSB integral linearity error.

Key Specifications

Pinout & Package

Package: Plastic Quad Flat Package (QFP44), body 10 × 10 × 1.75 mm, lead pitch 0.8 mm, 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 ADV7170KSTZ, SAA7103H/V4,557 delivers integrated scaling, flicker reduction, and dual-output capability - eliminating four external ICs. Against SAA7108E, it trades off copy protection for 15% lower analog supply current and broader industrial temperature tolerance (0–70°C vs −20–70°C).

Availability

SAA7103H/V4,557 is available at Aetrix Electronics and suitable for PC-to-TV adapter cards, embedded set-top boxes, industrial HMIs, and dual-display multimedia terminals requiring stable component supply across long-lifecycle production programs.

Supply support for SAA7103H/V4,557 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 is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The SAA7103H/V4,557 belongs to NXP's legacy video encoder product line, designed specifically for cost-sensitive, high-reliability PC-to-analog-TV bridging in embedded computing and broadcast-adjacent equipment.

FAQ

What video standards does the SAA7103H/V4,557 support?

The SAA7103H/V4,557 supports NTSC M and PAL B/G standards with crystal-stable subcarrier generation at 3.58 MHz (NTSC) and 4.43 MHz (PAL). It complies with RS-170-A and ITU-R BT.470-3 luminance/chrominance filtering requirements and enables proper interlacing, blanking, and sync pulse insertion for broadcast-compliant CVBS and S-video outputs. The SAA7103H/V4,557 does not support SECAM or PAL-M.

Can the SAA7103H/V4,557 generate both CVBS and RGB outputs simultaneously?

No, the SAA7103H/V4,557 cannot drive CVBS and RGB outputs simultaneously from the same pixel clock domain. Its three DACs are shared resources: when configured for CVBS/S-video (using internal Y/C matrix), the RED_CR_C, GREEN_VBS_CVBS, and BLUE_CB_CVBS pins output composite or separated Y/C signals; when in RGB bypass mode, those same pins output R/G/B with HSM_CSYNC/VSM sync. Simultaneous dual-output requires external multiplexing or two separate encoders.

What is the function of the RSET and DUMP pins on the SAA7103H/V4,557?

The RSET pin sets the full-scale reference current for all three DACs via a 1 kΩ resistor to analog ground; DUMP provides a second reference node connected via a 12 Ω resistor to analog ground. Together, they establish the DAC output voltage range and linearity. The SAA7103H/V4,557 datasheet specifies no capacitor in parallel with the RSET resistor, and DUMP must not be left floating - both are critical for achieving ±3 LSB integral linearity across the 10-bit output range.

Does the SAA7103H/V4,557 support hardware cursor overlay, and how is it configured?

Yes, the SAA7103H/V4,557 supports a 32×32 pixel hardware cursor with 2-bit-per-pixel encoding (four states: transparent, first color, second color, inverted). The cursor bitmap 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, hot spot, and color registers are fully programmable, enabling low-latency GUI overlays without CPU intervention - a key feature for real-time industrial HMIs using the SAA7103H/V4,557.

Is the SAA7103H/V4,557 compatible with modern 1.8 V or 2.5 V logic interfaces?

No, the SAA7103H/V4,557 is a 3.3 V monolithic CMOS device with 5 V-tolerant I/Os only. Its digital supply (VDDD1/VDDD2) and analog supply (VDDA1/VDDA2) require 3.3 V ±10%, and all control pins (SCL, SDA, RESET, etc.) operate at TTL-compatible voltage levels referenced to 3.3 V. Interfacing with 1.8 V or 2.5 V microcontrollers requires level-shifting circuitry on the I²C and control lines to avoid damage or undefined behavior in the SAA7103H/V4,557.