A Digital Micromirror Device (DMD) is a micro-electro-mechanical-system (MEMS) spatial light modulator: an array of microscopic aluminum mirrors, one per pixel, each hinged so it can rotate between two stable landed states. In the "on" state a mirror reflects illumination through the projection lens; in the "off" state it deflects that light into a beam dump. The DLP550JE carries 1024 × 768 = 786,432 such micromirrors on a 10.8 µm pitch, giving a 0.55-inch (active area 11.059 mm × 8.294 mm) diagonal array. Because each mirror is purely binary, grayscale and color are produced by pulse-width modulation: the controller switches every mirror on and off many times per frame, and the eye integrates the duty cycle into a brightness level.

The DLP550JE is not used alone - it is the optical engine of the DLP550JE chipset. The DLPC4420 display controller receives the video stream, formats it into binary bit-planes and generates the precise mirror-reset and sequencing commands, while the DLPA100 and DLPA200 power-management / driver ICs generate the regulated logic rails and, critically, the high-voltage offset, bias and reset waveforms that latch and clock the micromirrors. Pixel data reaches the DMD over two LVDS sub-buses clocked at up to about 320 MHz (DCLK), supplying the bandwidth that high-bit-depth XGA images demand. A corner-illumination geometry keeps the optical path compact.

With its balance of resolution, brightness capability and cost, the DLP550JE targets 0.55-inch XGA digital signage, education projectors and business / conference-room projectors. The DLP architecture brings high sequential contrast, fast response with no motion smearing, an inherently digital and stable image, and the long service life of a sealed MEMS array - which is why DLP technology is also adopted well beyond projection, in 3D printing, machine vision and automotive display.

Note: Values are taken from the Texas Instruments DLP550JE data sheet (DLPS101C). Recommended operating conditions are use-case dependent (especially array temperature and illumination); design engineers should confirm every parameter against the latest data sheet and the DLP optical / thermal application notes before committing a design.

The DLP550JE is supplied in the FYA 149-pin ceramic package (ceramic pin-grid array), with a body of 32.20 mm × 22.30 mm. A sealed glass optical window of 17.694 mm × 14.739 mm sits over the mirror array, presenting a clear optical aperture of about 14.152 mm × 11.424 mm. The leads are on a 1.27 mm grid pitch (pin diameter Ø0.305 mm), and a chamfered corner marks pin A1 for orientation.

The pin-grid leads mount through-hole into a socket or printed-circuit board. The window protects the micromirror array and must be kept clean, handled per TI's DMD handling guidelines and held within its 85 °C limit. The dimensioned outline below gives the body and window geometry needed for opto-mechanical alignment and heat-sink design.

The DLP550JE uses an FYA 149-pin grid (the bottom view is shown below). Rather than a small in-line list, its pins are best understood as functional groups; the full per-pin assignment is given in the Pin Functions table of the data sheet:

• LVDS pixel-data inputs (2× bus): Two differential LVDS sub-buses carry the binary bit-plane pixel data into the device.
• DCLK (LVDS clock): Differential data clock, up to about 320 MHz, that times the incoming LVDS pixel data.
• Interface control - PWRDNZ / LVDS_RSTZ: Power-down and LVDS-interface reset control inputs that sequence the receiver.
• MBRST[15:0] - micromirror reset bus: High-voltage reset lines from the PMIC that clock the mirrors; impedance-controlled at 95–105 Ω (about 160–210 pF per line).
• Mirror bias / offset rails (V_OFFSET, V_MBRST): High-voltage offset and reset rails (V_MBRST −27 V to +26.5 V) supplied by the DLPA200 / DLPA100.
• SCP serial control port: Low-speed serial port (SCPCLK 50–500 kHz with its data / enable lines) used for device configuration.
• Power - V_CC / V_CCI: 3.3 V LVCMOS core-logic and LVDS-interface supplies (kept within 0.3 V of each other).
• Ground (V_SS): Common device ground and the thermal / mechanical reference for the ceramic package.

The closest cross-reference is the standard TI ordering number for this exact device; the others are nearby DLP DMDs at different array sizes and resolutions. A DMD is not a simple drop-in: each device pairs with a specific DLPC controller and PMIC and has its own optical format, so verify the chipset, illumination geometry and mechanical mount before substituting.

DLP550JE Chipset - Required Companion Devices

Texas Instruments (TI, NASDAQ: TXN), headquartered in Dallas, Texas, USA, is a global semiconductor company and the inventor and sole manufacturer of DLP (Digital Light Processing) technology, which is built around the Digital Micromirror Device. TI's DLP Products group supplies DMDs together with the matched DLPC display controllers and DLPA power-management ICs for display and advanced light-control markets.

TI publishes the governing DLP550JE data sheet (DLPS101C) along with the FYA package drawing and the DLP optical, thermal and handling application notes that the device requires. The data sheet is the authoritative reference for electrical limits, the micromirror architecture and the recommended chipset; InFortune Electronics supplies the device under code 1076-6434B and provides sourcing and technical support.