TC94A23F is a single-chip CD processor from Toshiba that incorporates a 4-bit microcontroller. The controller features an LCD/LED driver, 4-channel 6-bit AD converter, 2/3-line serial interface, buzzer, interrupt function, and 8-bit timer/counter. The CPU can select one of three crystal oscillator operating clocks (16.9344 MHz, 4.5 MHz, and 75 kHz), facilitating interface with the CD processor. The CD processor incorporates sync separation protection and interpolation, EFM decoder, error correction, digital equalizer for servo, and servo controller. The CD processor also incorporates a 1-bit DA converter. In combination with RF amp TA2153FN or TA2109F, TC94A23F can very simply configure an adjustment-free CD player. Thus, the IC is suitable for CD systems for automobiles and radio-cassette players.
The TC94A23F is a single‑chip CD processor that integrates a 4‑bit microcontroller, LCD/LED driver, 4‑channel 6‑bit AD converter, serial interface, buzzer, interrupt function, and an 8‑bit timer/counter. It supports three crystal oscillator frequencies (16.9344 MHz, 4.5 MHz, 75 kHz) and includes EFM decoding, error correction, digital equalizer, and servo control for automotive and radio‑cassette CD systems.
The document details the pin assignments, package (QFP100‑P‑1420‑0.65A), electrical characteristics, memory sizes, and usage restrictions. It also outlines power‑on reset, backup modes, and test mode controls, providing designers with the necessary data to integrate the IC into their products.
| Operating voltage | CD on: 4.5‑5.5 V (typ. 5.0 V); CD off: 3.0‑5.5 V |
|---|---|
| Operating temperature range | -40 °C to 85 °C |
| Package | QFP100‑P‑1420‑0.65A (0.65 mm pitch, 2.7 mm thick) |
| Weight | 1.6 g (typ.) |
| Program memory (ROM) | 16‑bit × 8 k‑step |
| Data memory (RAM) | 4‑bit × 512‑word |
| AD converter | 6‑bit × 4‑channel |
| Timer/Counter | 8‑bit, selectable 100 Hz/1 kHz |
| Serial interface | Supports 2‑line/3‑line method, 4 or 8‑bit data length |
| Crystal oscillator frequencies | 16.9344 MHz, 4.5 MHz, 75 kHz |
At CD on the device runs from 4.5 V to 5.5 V (typical 5.0 V); at CD off the supply voltage is 3.0 V to 5.5 V.
It is supplied in a QFP100‑P‑1420‑0.65A package with a 0.65 mm pitch and 2.7 mm thickness.
The typical weight is 1.6 g.
The IC can operate with crystal frequencies of 16.9344 MHz, 4.5 MHz, or 75 kHz.