This article provides technical specifications for the Macintosh LC 575 computer.

Microprocessor

MC68LC040, 33 MHz clock speed; 32-bit data bus

Built-in memory-management unit

Memory

4MB RAM on logic board

Expandable (by authorized Apple dealer) to as much as 36MB by adding 1MB, 2MB, 4MB, 8MB, 16MB, or 32MB SIMM to a single 72-pin slot. Requirement: 72-pin fast-paged, 80ns or faster.

1MB ROM

Storage

One built-in Apple SuperDrive 1.4MB floppy disk drive

One internal 160MB or 320MB hard disk

Internal AppleCD 300i Plus CD-ROM drive with new tray-loading design

- Does not require a CD caddy

- Average access time: 295 ms

- Capacity: 650MB

- Supported formats: Multisession Photo CD, High Sierra (ISO 9660), Macintosh HFS, Audio CD, CD + G/CD + MIDI, CD-ROM XA, CD-I

Start-up (bootable) CD-ROM with system software

Video Display

Integrated Macintosh Color Display with 14-inch Trinitron CRT

Resolution: 640 x 480 pixels, 69 dpi, .26 mm dot pitch

Two VRAM expansion slots:

Standard 512K VRAM supports 256 colors (8-bit color)

Optional 1MB VRAM supports 32,768 colors (16-bit color)

Interfaces

Internal expansion slot for one Macintosh LC processor-direct expansion card. Compatible with Apple IIe Card.

SCSI interface for connecting up to five external devices

Communication slot can be easily configured -- by the user -- to accept any of three Ethernet cards (10BASE-T, Thin Coax, Apple AUI), or a high-speed 14.4 KB fax/modem (based on PowerBook Express Modem).

Two serial (RS-232/RS-422) ports

One stereo sound-output port for external audio amplifier or headphones

One Apple Desktop Bus (ADB) ports for keyboard, mouse, and other devices

Front headphone jack

Built-in microphone above display

One sound-input port for four sources: internal or external microphone*, internal CD-ROM, or external audio.

* Note: Requires the PlainTalk microphone.

Pull-out Logic Boar d

Allows easy upgrades to DRAM, VRAM, PDS, and communication slot.

Sound Generator

Stereo 8-bit digital-analog conversion using 22-kHz sample rate, capable of driving stereo headphones or other stereo equipment through the sound jack and headphone jack

Two built-in stereo speakers

CD output is 16-bit digital

Keyboard and Mouse

ADB Mouse II

Keyboard purchased separately only in the K-12 configuration; several ADB keyboards with numeric keypads available

Clock/Calendar

Custom integrated circuit with long-life alkaline battery.

Disability Access

CloseView, Easy Access, and visible-beep software are built in.

Third-party options provide alternative input and output devices

Power Requirements

Line voltage: 90 to 264 V AC, RMS single phase, automatically configured

Frequency: 47 to 63 Hz

Power: 40 W maximum, not including display

60 W maximum, including display

Energy-saving feature reduces power consumption by 50%

One AC outlet powers computer, display, drives, and speakers

ADB Power Requirements

Maximum current draw for all ADB devices: 500 mA (three ADB devices maximum is recommended)

Mouse draws 10 mA

Keyboard draws 25 to 80 mA, depending model used

System Software

Requires System 7.1 or later and the System Enabler 065.

Size and Weight

Height: 17.9 in. (45.5 cm)

Width: 13.5 in. (34.4 cm)

Depth: 16.5 in. (42.0 cm)

Weight: 40.5 lbs (18.4 kg)

Operating Environment

Operating temperature: 50 to 104 F (10 to 40 C)

Storage temperature: 40 to 116.6 F (40 to 47 C)

Relative humidity: 20% to 85% noncondensing

Maximum altitude: 15,000 ft. (4,722 m)