| Known Devices:
| 501, 502, 503, 504.
|
| Period: | Late 1960s.
|
| Source of Data:
| Data for these devices was derived from reverse engineering of a
Sony SOBAX 2500
(1999 Nov).
|
| Technology:
| Measurements suggest DTL/TTL with open-collector outputs. Given the low supply voltage though, this is not standard DTL/TTL.
Gate outputs are open-collector, external pull-up resistors are none-the-less absent for most gate outputs in application.
Flip-flops outputs do have internal pull-up resistors.
|
| Supply Voltage: | +4 V.
|
| Logic:
| Gate symbols are presented in accordance with
- TRUE = high impedance or +4V
- FALSE = low impedance to ground or 0V
|
| Packaging:
| Sony 14-pin DIP. Similar to standard DIP but the distance between the two rows is slightly greater than the standard (...one can only wonder).
|
