IC function:	1 Mbit (256k×4) DRAM
Related components:	64 kbit (16k×4) DRAM, 256 kbit (64k×4) DRAM, 4 Mbit (1M×4) DRAM

Component documentation

IC number	Manufacturer	Documentation
TC514256, TC514256A	Toshiba	Not available
TC514258	Toshiba	Not available
LH64256	Sharp	Not available
LH64258	Sharp	Not available
MSM514256	Oki	Not available
MSM514258	Oki	Not available
HM514256	Hitachi	Not available
HM514256A	Hitachi	Not available
HM514258	Hitachi	Not available
µPD424256	NEC	Not available
µPD424258	NEC	Not available
TMS44C256	Texas Instruments	Not available
MB81C4256	Fujitsu	Not available
MN414256	Matsushita (Panasonic)	Not available
MN414256L	Matsushita (Panasonic)	Not available
LC324256	Sanyo	Not available
HYB514256A	Siemens	Not available

Component versions

IC number	Access time	Mode	Package
TC514256		Page
MSM514256		Page
HM514256		Page
µPD424256		Page
TC514258		Static column
LH64258		Static column
MSM514258		Static column
HM514258		Static column
µPD424258		Static column
TMS44C256		Static column
TMS44C256-12	120 ns		20-pin DIP
TC514256P-12	120 ns		20-pin DIP
MB81C4256-12P	120 ns		20-pin DIP
µPD424256C-10	100 ns		20-pin DIP
MN414256-10	100 ns		20-pin DIP
D424256C-10	100 ns		20-pin DIP
TC514256P-10	100 ns		20-pin DIP
TC514256AP-10	100 ns		20-pin DIP
MN414256L-10	100 ns		20-pin DIP
TMC44C2256-10N	100 ns		20-pin DIP
HM514256AP-10	100 ns		20-pin DIP
LH64256AD-10	100 ns		20-pin DIP
MB81C4256-10P	100 ns		20-pin DIP
MSM514256-10R	100 ns		20-pin DIP
D424256V-10	100 ns		20-pin ZIP
TC51425AZ-10	100 ns		20-pin ZIP
MN414256L-10	100 ns		20-pin ZIP
MB81C4256-10	100 ns		20-pin ZIP
LC324256Z-10	100 ns		20-pin ZIP
MB81C4256-10	100 ns		26/20-pin SOJ
MB81C4256-80	80 ns		26/20-pin SOJ
TC514256AP-80	80 ns		20-pin DIP
HYB514256A-80	80 ns		20-pin DIP
HYB514256A-70	70 ns		20-pin DIP

Component part numbers

CBM part number	CBM part description
318099-01	DRAM 256K X 4 100 ns ZIP
318099-02	DRAM 256K X 4 150 ns
318099-03	DRAM 256K X 4 120 ns ZIP
318099-04	DRAM 256K X 4 120 ns
318099-05	DRAM 256K X 4 80 ns ZIP
318099-06	DRAM 256K X 4 80 ns
390365-01	IC, 44256 DIP 120 ns
390668-01	514258, 256X4 Static col DRAM 80 ns
390668-02	514258, 256X4 80 ns DRAM Static col DIP
390668-03	DRAM 256K X 4 ST COL 100 ns ZIP
390668-04	DRAM 256K X 4 ST COL 80 ns ZIP
390668-06	DRAM 256K X 4 ST COL 120 ns ZIP
391201-01	DRAM 256K X 4 80 ns

Positions

Device	Positions	Positions (not installed)	Package	Mode	Access time
A2000-CR Rev. 6	U501..U508		DIP		120 ns
A500 Rev. 6A/7	U16..U19	U20..U23	DIP		150 ns
A500 Plus	U16..U23		DIP		120 ns
CDTV	U65..U72		ZIP		100 ns
A3000 (Chip memory)	U259..U266	U267..U274	DIP	Static column or Page	120 ns
A3000 (Fast memory)	U850D..U857D		DIP	Static column or Page	80 ns
		U850..U881	ZIP
A3000T (Chip memory)	U259..U266	U267..U274	ZIP	Static column or Page	120 ns
A3000T (Fast memory)	U850..U865	U866..U881	ZIP	Static column or Page	80 ns
A501 Rev. 6C	U1..U4		DIP		150 ns
A501 Plus	U1..U8		DIP		120 ns
A590		U15, U16, U19, U20, U23, U24, U27, U28	DIP		120 ns
A2091		U14..U29	DIP		120 ns
A2630 (4Mb)	U400..U430		ZIP		100 ns
A2286 sandwich board	U34..U37, U40..U43		DIP		120 ns
CD³² MPEG board	U301		SOJ		100 ns
PC10-III Rev. 6	U305..U308		DIP		120 ns
PC30-III	U707, U708, U711, U712		DIP		100 ns
PC40-III	U707..U414		DIP		100 ns
PC60-III	U3..U6, U15, U16, U20, U21, U29, U30, U32, U33, U40, U41, U46, U47		DIP		100 ns
SL286/SL386SX main board	U403..U410, U507, U508		SOJ		80 ns
		U509, U510	ZIP

Pinout DIP package

Pin	Type	Name
1..2	I/O	Data
3	Input	_WE
4	Input	_RAS
5	N/C	NC
6..9	Input	Address
10	Power	VCC
11..15	Input	Address
16	Input	_OE
17	Input	_CAS
18..19	I/O	Data
20	Power	GND

Pinout ZIP package

Pin	Type	Name
1	Input	_OE
2	Input	_CAS
3..4	I/O	Data
5	Power	GND
6..7	I/O	Data
8	Input	_WE
9	Input	_RAS
11..14	Input	Address
15	Power	VCC
16..20	Input	Address

Pinout SOJ package

Pin	Type	Name
1..2	I/O	Data
3	Input	_WE
4	Input	_RAS
5	N/C	NC
9..12	Input	Address
13	Power	VCC
14..18	Input	Address
22	Input	_OE
23	Input	_CAS
24..25	I/O	Data
26	Power	GND