NXP Semiconductors SAA7111AHZ/V4,557

Overview

SAA7111AHZ/V4,557 from Philips Semiconductors is an Enhanced Video Input Processor (EVIP) for analog video digitization and multi-standard decoding. It supports four CVBS or two Y/C analog inputs, integrates dual 8-bit ADCs, on-chip clock generation (24.576 MHz crystal), automatic PAL/NTSC/SECAM detection, and outputs CCIR-601–compliant YUV 4:2:2 (16-bit) or RGB (5-6-5) at 13.5 MHz over a 16-bit VPO bus - used in desktop video capture and multimedia PCMCIA cards.

For engineers reviewing the SAA7111AHZ/V4,557 datasheet, SAA7111AHZ/V4,557 pinout, SAA7111AHZ/V4,557 application, or SAA7111AHZ/V4,557 equivalent, key selection criteria include its LQFP64 package, 3.3 V digital/analog supply, real-time Line-21 text slicing, programmable luminance peaking, chrominance comb filtering for NTSC cross-colour reduction, and I²C-bus configurability of HREF/VREF timing and output formats.

Technical Context

The SAA7111AHZ/V4,557 implements a line-locked clock architecture with digital PLL for horizontal sync processing and subcarrier recovery, enabling stable decoding across PAL BGHI/N/M, NTSC M/J/N/4.43, and SECAM without external timing references. Its analog front-end includes switchable white peak control, dual anti-aliasing filters, and programmable static gain or automatic gain control per channel.

Functional blocks include a dedicated Line-21 text slicer with register-based read-back (I²C subaddresses 1A–1C), 27 MHz VBI-data bypass via TUF upsampling, and boundary-scan test compliance (IEEE 1149.1, ID-code 0F11102B). The RTCO output delivers serial status on HPLL increment, FSC-PLL phase, and PAL sequence - enabling synchronized encoding in downstream systems.

Key Specifications

Pinout & Package

LQFP64 package (SOT314-2), 10 × 10 × 1.4 mm body, 0.5 mm lead pitch. Exposed pad not specified; thermal design assumes standard PCB copper pour under package.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video input processor applications.

Compared with SAA7110AH, the SAA7111AHZ/V4,557 adds critical broadcast-data features (Line-21, VBI bypass, RTCO) without changing pinout or power requirements; ADV7170KSTZ performs a fundamentally different signal chain function and cannot replace it in video capture roles.

Availability

SAA7111AHZ/V4,557 is available at Aetrix Electronics and suitable for desktop video capture, multimedia PCMCIA cards, and digital television tuner modules requiring stable component supply and long-term obsolescence management.

Supply support for SAA7111AHZ/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

Philips Semiconductors (now NXP Semiconductors) is a Dutch semiconductor company founded in 1953, specializing in analog, mixed-signal, and video processing ICs for consumer electronics.

The SAA7111A product line was designed specifically for high-integration analog video digitization in cost-sensitive, space-constrained desktop and portable multimedia systems - emphasizing auto-standard detection, low power, and I²C configurability.

FAQ

What video standards does the SAA7111AHZ/V4,557 support and how is detection handled?

The SAA7111AHZ/V4,557 supports PAL BGHI/N/M, NTSC M/J/N/4.43, and SECAM. Detection is fully automatic: the device analyzes field frequency (50/60 Hz), sync structure, and subcarrier characteristics during vertical blanking to identify and configure itself for the incoming standard without external intervention or firmware polling. This behavior is confirmed in Section 1 and Section 3 of the datasheet.

Does the SAA7111AHZ/V4,557 require an external crystal, and what is the exact frequency?

Yes, the SAA7111AHZ/V4,557 requires a 24.576 MHz crystal connected between XTALI and XTAL pins. This single crystal drives the entire clock generation circuit (CGC), producing LLC (27 MHz), LLC2 (13.5 MHz), and internal subcarrier clocks - eliminating need for multiple oscillators. The specification is explicitly stated in Section 1 (Features) and Section 4 (Quick Reference Data).

Can the SAA7111AHZ/V4,557 output RGB data, and what formats are supported?

Yes, the SAA7111AHZ/V4,557 supports RGB output in two formats: 16-bit RGB (5-6-5) with dithering and 24-bit RGB (8-8-8) for special applications. These are selected via I²C-bus bit RGB888 and output on the VPO bus (pins VPO0–VPO15). The 5-6-5 format is standard; 8-8-8 requires external memory buffering and is documented in Section 8.7 and Table 6 of the datasheet.

How does the Line-21 text slicing function work in the SAA7111AHZ/V4,557?

The SAA7111AHZ/V4,557 contains a dedicated hardware Line-21 slicer that detects and acquires Closed Caption data from Field 1 or Field 2 of 525-line CVBS. Valid data is stored in I²C registers 1A (Field 1), 1B (Field 2), and 1C (status flags F1VAL/F2VAL/F1RDY/F2RDY). Parity is checked and stored in the MSB of each byte - all detailed in Section 8.13 and Figure 20.

Is the SAA7111AHZ/V4,557 compatible with 5 V logic systems?

Yes, the SAA7111AHZ/V4,557 has 5 V–tolerant digital I/O ports (SDA, SCL, FEI, GPSW, RTS0/1, etc.), allowing direct interfacing with 5 V microcontrollers or FPGAs while operating on a 3.3 V supply. This is explicitly listed in Section 1 (Features) and verified in Section 11 (Limiting Values) of the datasheet.