Description

The SM5907AF is a compression and non-compression type shock-proof memory controller LSI designed for use in compact disc players. It's an electronic component model that falls within the IC Chips category. With a voltage input range of 2.4 to 3.6 V, the compression level can be set in four levels, while external memory options range from 4 to 16M/s.

Specifications and features

• 2-channel processing
• Serial data input
• 2s complement, 16-bit/MSB first, right-justified format
• Wide capture function (up to 3 × speed input rate)
• System clock input
• 384fs (16.9344 MHz)
• Shock-proof memory controller
• ADPCM compression method
• 4-level compression mode selectable
• 4-bit compression mode 2.78 s/Mbit
• 5-bit compression mode 2.22 s/Mbit
• 6-bit compression mode 1.85 s/Mbit
• Full-bit non-compression mode 0.74 s/Mbit
• 4 external DRAM configurations selectable
• 1 or 2 × 16M DRAM (4M × 4 bits, refresh cycle = 2048 cycle)
• 1 or 2 × 4M DRAM (1M × 4 bits)
• Microcontroller interface
• Serial command write and status read-out
• Data residual detector: 15-bit operation, 16-bit output
• Forced mute
• Extension I/O
• Microcontroller interface for external control using 5 extension I/O pins
• +2.4 to +3.6 V operating voltage range
• Schmitt inputs
• All input pins (including I/O pins) except CLK (system clock)
• Reset signal noise elimination
• Approximately 3.8 µs or longer (65 system clock pulses) continuous LOW-level reset
• 44-pin QFP package (0.8 mm pin pitch)

Application Scenarios

The SM5907AF is primarily designed for use as a shock-proof memory controller LSI in compact disc players, which ensures it works efficiently and effectively to protect players from shocks, enhancing their performance and durability over the long term.

Comparison

• A wide range of compression levels to select from
• Multiple external memory options available
• Shock-proof design for enhanced durability and performance efficiency

• Designed specifically for use in compact disc players and may not be suitable for use in other electronic devices
• The number of external DRAM configurations available is limited