76489

Texas Instruments SN76489 Product Family Summary

Chip Variant	Freq (max)	Audio In	Invert Waveform
TMS9919 / SN94624	500 kHz	No	No
SN76489	4 MHz	No	Yes
SN76489A	4 MHz	No	No
SN76494	500 kHz	Yes	Yes
SN76494A	500 kHz	Yes	No
SN76496 / NCR 8496	4 MHz	Yes	Yes
SN76496A	4 MHz	Yes	No

Digital Complex Sound Generator

Pinout

DIP16
         +---\/---+
      D2 | 1    16| Vcc
      D1 | 2    15| D3
      D0 | 3    14| CLOCK
   READY | 4    13| D4
     *WE | 5    12| D5
     *OE | 6    11| D6
AUD. OUT | 7    10| D7
     GND | 8     9| N.C.
         +--------+

Frequency

DIP16
Set reader to FREQ, put black probe to GND, red probe to 14 to measure CPU clock

External links

SN76489 page on Wikipedia

Files

• 
  SN76489 Datasheet