DESCRIPTION
The M3004LD transmitter IC is designed for infrared remote control systems. It has a total of 448 commands which are divided into 7 sub-system groups with 64 commands each. The sub-system code may be selected by a press button, a slider switch or hard wired.
The M3004LD generates the pattern for driving the output stage. These patterns are pulse distance coded. The pulses are infrared flashes or modulated. The transmission mode is defined in conjunction with the sub-system address. Modulated pulses allow receivers with narrow-band preamplifiers for improved noise rejection to be used. Flashed pulses require a wide-band preamplifier within the receiver.

FEATURES SUMMARY
■ FLASHED OR MODULATED TRANSMISSION
■ 7 SUB-SYSTEM ADDRESSES
■ UP TO 64 COMMANDS PER SUB-SYSTEM
   ADDRESS
■ HIGH-CURRENT REMOTE OUTPUT AT
   VDD = 6V (–IOH = 80mA)
■ LOW NUMBER OF ADDITIONAL
   COMPONENTS
■ KEY RELEASE DETECTION BY TOGGLE
   BITS
■ VERY LOW STAND-BY CURRENT (< 2µA)
■ OPERATIONAL CURRENT < 1mA AT 6V
   SUPPLY
■ SUPPLY VOLTAGE RANGE 2 TO 6.5V
■ CERAMIC RESONATOR CONTROLLED
   FREQUENCY (typ. 450kHz)