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Semiconductor Devices of the CueCat

U1: ATC 93LC46 (serial EEPROM)

U2: Hyundai 90C54-GB189 (OTP/mask microcontroller)--running at 14.7456MHz

U3: Phillips 74HC373D (octal D-type transparent latch; 3-state)

U4: Utron UT6164JC-15 (15ns asynchronous SRAM, 8K x 8)

U5: Motorola HC4066 (quad analog switch multiplexer) or a Phillips 74HC4066D (quad bilateral switch)

U6: TI 271C 04T DH10 (under foil wrap--)

U7: TI LM358 (dual general purpose operational amplifier)