64k×1 DRAM used in Commodore and Amiga equipment

IC function: 64 kbit (64k×1) DRAM
Related components: 8 kbit (8k×1) DRAM, 16 kbit (16k×1) DRAM, 256 kbit (256k×1) DRAM, 1 Mbit (1M×1) DRAM

Component versions
IC number	Package	Access time
HM4864-3, HM4864P-3, HM4864AP-3, µPD4164-2, M5K416NS-20, MK4564N-20, MSM3764-20, M3764-20RS, MN4164P-20, HYB4164-3, LH2164-Z1, TMM4164AP-20, TMS4164-20NL	16-pin DIP	200 ns
MB8264-15-P-G, MB8264A-15, HM4864-2, MT4264-2, µPD4164C-15, MSM3764-15RS, LH2164-15, TMM4164P-3, MK4564N-15	16-pin DIP	150 ns

Component part numbers
CBM part number	CBM part description
901505-01	4164-2 DRAM
901505-02	IC MEM DRAM 64KX1BIT 150NS

Positions
Device	Positions	Positions (not installed)	Package	Access time
PC10 256k RAM expansion		U10, U11	DIP	150 ns
PC10 384k RAM expansion	U10, U11		DIP	150 ns
C64	U9..U12, U21..U24		DIP	200 ns
SX 64 CPU board	UA4..UA7, UB4..UB7		DIP	200 ns
Plus 4	U11..U18		DIP	200 ns
C128 rev. 6 board	U38..U53		DIP	200 ns
C128 rev. 7 board	U38..U53		DIP	150 ns
Super PET 9000 combo board	U22..U29		DIP	200 ns
CBM II lo-profile 128k	U64..U79	U29..U36, U45..U52	DIP	150 ns
CBM II lo-profile 256k	U29..U36, U45..U52, U64..U79		DIP	150 ns
CBM II hi-profile 128k	U37, U38, U45, U47, U50, U51, U59, U60, U67, U68, U76, U77, U85, U86, U89, U90	U39, U40, U47, U48, U52, U53, U61, U62, U69, U70, U78, U79, U87, U88, U91, U92	DIP	150 ns
CBM II hi-profile 256k	U37..U40, U45..U48, U50..U53, U59..U62, U67..U70, U76..U79, U85..U92		DIP	150 ns