Hardware Hacking

MIC502 Features
Temperature-proportional fan speed control
Low-cost, efficient PWM fan drive
4.5V to 13.2V IC supply range
Controls any voltage fan
Overtemperature detection with fault output
Integrated fan startup timer
Automatic user-specified sleep mode
Supports low-cost NTC/PTC thermistors
8-pin DIP and SOIC packages

SAA7324 Features
Integrated bitstream DAC with differential outputs, operating at 96fswith 3rd-order noise shaper; typical performance of -90 dB signal-to-noise ratio
Separate serial input and output interfaces allow data ‘loopback’ mode for use of onboard DAC with external Electronic Shock Absorption (ESA) systems
Up to 4 times speed mode
Low voltage operation at up to 2 times speed
Lock-to-disc mode
Full error correction strategy, t = 2 and e = 4
Full CD graphics interface
All standard decoder functions implemented digitally on chip
FIFO overflow concealment for rotational shock resistance
Digital audio interface (EBU), audio and data
Two and four times oversampling integrated digital filter, including fsmode
Audio data peak level detection
Kill interface for external DAC deactivation during digital silence
All SAA737x (CD7) digital servo and high-level functions
Low focus noise
Same playability performance as SAA737x (CD7)
Automatic closed-loop gain control available for focus and radial loops
Pulsed sledge support
Electronic damping of fast radial actuator during long jump
Microcontroller loading LOW
High-level servo control option
High-level mechanism monitor
Communication may be via TDA1301/SAA7345 compatible bus or I²C-bus
On-chip clock multiplier allows the use of 8.4672, 16.9344 or 33.8688 MHz crystals or ceramic resonators.

Low Voltage Audio Power Amplifier. The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low. This amplifier IC can drive 8 ohms speaker nicely with maximum power from 250 mW to 1W depending on operating voltage and IC version. Typical operating voltage range is 6-12V

MIC74 Description
2-Wire Serial I/O Expander and Fan Controller
MIC74 Vendor
Micrel
MIC74 Categories
Fan Controllers

MIC74 Features
Provides eight bits of general purpose I/O
Built in fan speed control logic (optional)
2-wire SMBusâ„¢/I2Câ„¢ compatible serial interface plus interrupt output
2.7V to 3.6V operating voltage range
5V-tolerant I/O
Low quiescent current: 2µA (typical)
Bit-programmable I/O options:
input or output
push-pull or open-drain output
interrupt on input changes
Outputs can directly drive LEDs (10mA IOL)
Up to 8 devices per bus

A Low noise dual operational amplifier - This is a very good for many audio designs. The 5532 has THD down around 0.0003% at normal levels and frequencies. The self noise is no worse than a 10 k ohm resistor.