IC number:	6540
IC function:	16 kbit (2k×8) ROM with five chip selects
Related components:	16 kbit (2k×8) ROM with two chip selects

Component documentation

IC number	Manufacturer	Documentation
6540	MOS Technology	Preliminary Datasheet July 1977

Component versions

IC number	Package	Access time
6540	28-pin DIP	300 ns

Programmed components

IC number	CBM part number	CBM part description	Chip description

Positions

Device	Position

Pinout

Pin	Type	Name
1	Power	VSS
2..4	Input	CS5..CS3
5..10	Input	A0..A5
11	Input	A9
12	Power	VCC
13..15	Input	A8..A6
16	Input	ø2
17	Input	CS1
18	Input	A10
19..26	I/O	DB7..DB0
27	Input	CS2
28	N/C	NC