The Texas Instruments TI 875 (P/N: 2550251-0021) and TI 877 (2550251-0021) models, 24-pin NLQ dot matrix printers, offer three distinct print speeds (draft, high density, letter quality) and multiple paper paths (straight bottom-feed, rear-feed, single sheet insert) to meet a wide variety of needs. The TI 877 is the 16" wide-carriage, 136-column version of the TI 875. Both printers also feature color capability, paper parking and a modular design.

Printing Capabilities

24-pin printhead Print Speeds: in characters per second (cps) at 12cpi - 240 cps (Draft) - 120 cps (High Density) - 80 cps (Letter Quality, LQ) Print Pitches: 5, 6, 8.5, 10, 12, and 17 cpi Optimized bidirectional printing Text and graphics printed in up to 7 colors (including black)

Fonts and Character Sets

Fonts: - Gothic font style resident - User-selectable font modules - Optional font styles: Courier, Orator, Prestige Elite, and OCR-A Full ASCII 96 character set (U.S.), Italic 96 character set (U.S.) International character sets for 10 countries User-defined downloadable characters IBM 256 character set, Epson character set

Graphics

Horizontal and vertical graphics resolution: - 60H x 90V (Draft) - 20H x 180V (High Density) - 180H x 180V (Letter Quality) Raster graphics Eight-bit vertical input

PrintHead

User-replaceable 24-pin printhead Head dot size: 0.2 mm 100M mean characters before failure

Ribbon

Carriage mount, continuous loop cartridge Color ribbon, standard: 1 million character-per-color-band ribbon life Black ribbon, optional: 2 million character ribbon life

Paper Handling

Paper parking Friction feed and tractor feed Handling of single sheets and continuous forms Top, rear, and bottom feed Original plus two copies Optional automatic sheet feeder Optional dual-bin upgrade

Electronics

Interfaces: - Centronics parallel port standard interface - Optional serial EIA RS-232-C port: 7 or 8 bits, with DC1/DC3 protocol Emulation: Epson LQ series Memory: - Standard 7KB buffer - Optional 64KB buffer

Operator Controls and Indicators

Power switch indicator Online/offline button indicator Line feed, form feed, insert sheet button indicator Type style selection for internal font, font cartridge Print mode selection for draft, high density, letter quality Character pitch selection for 10, 12, 17 cpi, and proportional Line spacing selection for 3, 4, 6, and 8 lines per inch (lpi) Paper out sensor / audible indicator

Physical Specs

Size: - 875: 18.5 inches width x 15.8 inches depth x 5.6 inches height - 877: 24.1 inches width x 15.8 inches depth x 5.6 inches height Weight: 30.9 pounds (875), 37.5 pounds (877) Power: AC 115 V ±15%, 50-60 Hz ± 3 Hz Temperature: 5° to 40° C (Operating), -40° to +70° (Non-operating) Relative humidity: 10% to 90% Altitude: 10,000 feet (Operating), 35,000 feet (Non-operating) Audible noise: less than 55 dBA

Reliability

Mean-time-between-failures (MTBF): 7500 hours at 20% duty cycle Mean-time-to-repair (MTR): 20 minutes