Examples of 4164 type RAM chips

64K by 1 bit, in a particular pin configuration ('pinout').

Note that some makers did not use "4164" in their part number. That is because makers did not need to adhere to a common naming standard. Some makers may have even purposely not used 4164 to avoid possible litigation action.

DIL packages listed only - LCC and SIP packages are omitted.

Japanese makers tend not to print prefixes on ICs and transistors. In photos below, it is seen that Mitsubishi, NEC, and OKI are in that category for the 4164.

Pin 1 use

On the majority of 4164 type chips, pin 1 is unused - datasheets indicate that the pin is "N.C." (Not Connected).
Pin 1 on the remaining chips is used to allow selection of additional refresh modes.

IMPORTANT:	Putting aside the major differences of access time and pin 1 use, the vast majority of 4164 type chips shown below are functionally the same.
	However, there can be subtle differences, ones that result in a particular 4164 chip not being suitable for your purpose.
	Sometimes, a device maker will produce a list of chips known to be compatible with their device (example).

Make	Part Number	Access Time	Pin 1 Use	Photo	Source	Source	Datasheet	Comment
AMD	AM9064-10	100 ns	?		4164 list 1			Pin 1 use unknown.
AMD	AM9064-12	120 ns	?		4164 list 1			Pin 1 use unknown.
AMD	AM9064-15	150 ns	?		4164 list 1	4164 list 2		Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
AMD	AM9064-20	200 ns	?		4164 list 1	4164 list 2		Pin 1 use unknown, however, inclusion on list#2 suggests N.C.

Fairchild	F4164-1	120 ns	N.C.		4164 list 1	4164 list 3	datasheet	Datasheet suggests ceramic package only.
Fairchild	F4164-2	150 ns	N.C.		4164 list 1	4164 list 3	datasheet	Datasheet suggests ceramic package only.
Fairchild	F4164-3	200 ns	N.C.		4164 list 1	4164 list 3	datasheet	Datasheet suggests ceramic package only.

Fujitsu	MB8264-15	150 ns	N.C.		4164 list 2	4164 list 3
Fujitsu	MB8264-20	200 ns	N.C.		4164 list 2	4164 list 3
Fujitsu	MB8264A-10	100 ns	N.C.			4164 list 3	datasheet	Datasheet indicates: P suffix for plastic, Z suffix for ceramic
Fujitsu	MB8264A-12	120 ns	N.C.			4164 list 3	datasheet	Datasheet indicates: P suffix for plastic, Z suffix for ceramic
Fujitsu	MB8264A-15	150 ns	N.C.	photo			datasheet	Datasheet indicates: P suffix for plastic, Z suffix for ceramic

Fujitsu	MB8265-15	150 ns	REF			4164 list 4		65
Fujitsu	MB8265-20	200 ns	REF			4164 list 4		65
Fujitsu	MB8265A-10	100 ns	REF			4164 list 4		65
Fujitsu	MB8265A-12	120 ns	REF			4164 list 4		65

Fujitsu	MB8266A-10	100 ns	REF			4164 list 4		66
Fujitsu	MB8266A-12	120 ns	REF			4164 list 4		66

Hitachi	HM4864-2	150 ns	N.C.			4164 list 3	datasheet	Ceramic case.
Hitachi	HM4864-3	200 ns	N.C.			4164 list 3	datasheet	Ceramic case.
Hitachi	HM4864P-2	150 ns	N.C.		4164 list 1	4164 list 2	datasheet	Plastic case.
Hitachi	HM4864P-3	200 ns	N.C.		4164 list 1	4164 list 2	datasheet	Plastic case.
Hitachi	HM4864A-12	120 ns	N.C.		4164 list 1	4164 list 3		Ceramic case.
Hitachi	HM4864A-15	150 ns	N.C.		4164 list 1	4164 list 3		Ceramic case.
Hitachi	HM4864A-20	200 ns	N.C.		4164 list 1	4164 list 3		Ceramic case.
Hitachi	HM4864AP-12	120 ns	N.C.		4164 list 1	4164 list 3		Plastic case.
Hitachi	HM4864AP-15	150 ns	N.C.	photo	4164 list 1	4164 list 3		Plastic case.
Hitachi	HM4864AP-20	200 ns	N.C.		4164 list 1	4164 list 3		Plastic case.

Hitachi	HM4865AP-12	120 ns	REF		4164 list 1	4164 list 4		Plastic case.
Hitachi	HM4865AP-15	150 ns	REF		4164 list 1	4164 list 4		Plastic case.
Hitachi	HM4865AP-20	200 ns	REF		4164 list 1	4164 list 4		Plastic case.

Inmos	IMS2600-10	100 ns	N.C.		4164 list 1		datasheet
Inmos	IMS2600-12	120 ns	N.C.		4164 list 1		datasheet
Inmos	IMS2600-15	150 ns	N.C.		4164 list 1		datasheet

Intel	2164-5	150 ns	N.C.		4164 list 1	4164 list 3		Ceramic case.
Intel	2164-6	200 ns	N.C.		4164 list 1	4164 list 3		Ceramic case.
Intel	C2164-15	150 ns	N.C.			4164 list 3		Cermamic case.
Intel	C2164-20	200 ns	N.C.			4164 list 3		Cermamic case.
Intel	C2164-25	250 ns	N.C.			4164 list 3		Cermamic case.
Intel	C2164A-15	150 ns	N.C.			4164 list 3		Plastic case.
Intel	C2164A-20	200 ns	N.C.			4164 list 3		Plastic case.
Intel	P2164A-15	150 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Intel	P2164A-20	200 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.

Matsushita	MN4164P-12	120 ns	N.C.		4164 list 3
Matsushita	MN4164P-15	150 ns	N.C.	photo	4164 list 3		datasheet	Plastic case. Datasheet indicates that MN4164-15 is the ceramic version.
Matsushita	MN4164P-20	200 ns	N.C.		4164 list 3		datasheet	Plastic case. Datasheet indicates that MN4164-20 is the ceramic version.
Matsushita	MN4164P-25	250 ns	N.C.		4164 list 3		datasheet	Plastic case. Datasheet indicates that MN4164-25 is the ceramic version.

Micron	MT4264N-2	150 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Micron	MT4264N-3	200 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Micron	MT4264-10	100 ns	N.C.				datasheet	Datasheet indicates an additional marking of 'C' for the ceramic version.
Micron	MT4264-12	120 ns	N.C.				datasheet	Datasheet indicates an additional marking of 'C' for the ceramic version.
Micron	MT4264-15	150 ns	N.C.	photo			datasheet	Datasheet indicates an additional marking of 'C' for the ceramic version.
Micron	MT4264-20	200 ns	N.C.				datasheet	Datasheet indicates an additional marking of 'C' for the ceramic version.

Mitsubishi	M5K4164AP-10	100 ns	REF		4164 list 4
Mitsubishi	M5K4164AP-12	120 ns	REF		4164 list 4
Mitsubishi	M5K4164AP-15	150 ns	REF		4164 list 4
Mitsubishi	M5M4164P-12	120 ns	REF		4164 list 4			Note: In list #4 as "M5M", not "M5K" - a typo ???
Mitsubishi	M5K4164P-15	150 ns	REF		4164 list 4			Plastic case.
Mitsubishi	M5K4164P-20	200 ns	REF		4164 list 4			Plastic case.
Mitsubishi	M5K4164S-15	150 ns	REF		4164 list 4			Ceramic case.
Mitsubishi	M5K4164S-20	200 ns	REF		4164 list 4			Ceramic case.
Mitsubishi	M5M4164NP-12	120 ns	N.C.			4164 list 3		Note: In list #3 as "M5M", not "M5K" - a typo ???
Mitsubishi	M5K4164NP-15	150 ns	N.C.		4164 list 2	4164 list 3		Plastic case.
Mitsubishi	M5K4164NP-20	200 ns	N.C.		4164 list 2	4164 list 3		Plastic case.
Mitsubishi	M5K4164NS-15	150 ns	N.C.		4164 list 2	4164 list 3		Ceramic case.
Mitsubishi	M5K4164NS-20	200 ns	N.C.		4164 list 2	4164 list 3		Ceramic case.
Mitsubishi	M5K4164ANP-10	100 ns	N.C.		4164 list 3
Mitsubishi	M5K4164ANP-12	120 ns	N.C.		4164 list 3		datasheet
Mitsubishi	M5K4164ANP-15	150 ns	N.C.	photo			datasheet	Photo is of a unit within an IBM 5160
Mitsubishi	M5K4164ANP-20	150 ns	N.C.	photo			datasheet	As shown in photo, the prefix of "M" is not printed on the chip.

Mostek	MK4164J-12	120 ns	REF			4164 list 4		Ceramic case.
Mostek	MK4164N-12	120 ns	REF			4164 list 4		Plastic case.

Mostek	MK4564N-15	150 ns	?	photo	4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Mostek	MK4564N-20	200 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.

Motorola	MCM6664A-12	120 ns	REF				datasheet	Datasheet indicates: If pin 1 not used, it should be pulled high via 10K resistor.
Motorola	MCM6664A-15	150 ns	REF				datasheet	Datasheet indicates: If pin 1 not used, it should be pulled high via 10K resistor.
Motorola	MCM6664A-20	200 ns	REF				datasheet	Datasheet indicates: If pin 1 not used, it should be pulled high via 10K resistor.
Motorola	MCM6664-15	150 ns	REF			4164 list 4
Motorola	MCM6664-20	200 ns	REF			4164 list 4

Motorola	MCM6665-15	150 ns	N.C.		4164 list 3
Motorola	MCM6665-20	200 ns	N.C.		4164 list 3
Motorola	MCM6665AP15	150 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Motorola	MCM6665AP20	200 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Motorola	MCM6665BP15	150 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Motorola	MCM6665BP20	200 ns	?	photo	4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Motorola	MCM6665L25	250 ns	N.C.		4164 list 3

National Semiconductor	NSC4164-1	120 ns	N.C.		4164 list 3			Plastic case.
National Semiconductor	NSC4164-2	150 ns	N.C.		4164 list 3			Plastic case.
National Semiconductor	NMC3764-12	120 ns	N.C.		4164 list 3
National Semiconductor	NMC3764-15	150 ns	N.C.		4164 list 3
National Semiconductor	NMC3764-20	200 ns	N.C.		4164 list 3

NEC	µpD4164C-1	250 ns	N.C.			4164 list 3		Plastic case.
NEC	µpD4164C-2	200 ns	N.C.	photo	4164 list 2	4164 list 3		Plastic case. Photo is of a unit within a late IBM 5150
NEC	µpD4164C-3	150 ns	N.C.		4164 list 2	4164 list 3		Plastic case.
NEC	µpD4164C-10	100 ns	N.C.				datasheet	Plastic case.
NEC	µpD4164C-12	120 ns	N.C.			4164 list 3	datasheet	Plastic case.
NEC	µpD4164C-15	150 ns	N.C.	photo		4164 list 3	datasheet	Plastic case.
NEC	µpD4164C-20	200 ns	N.C.			4164 list 3	datasheet	Plastic case.
NEC	µpD4164D-12	120 ns	N.C.			4164 list 3		Ceramic case.
NEC	µpD4164D-15	150 ns	N.C.			4164 list 3		Ceramic case.
NEC	µpD4164D-20	200 ns	N.C.			4164 list 3		Ceramic case.

OKI	MSM3764-2	??? ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
OKI	MSM3764-12	120 ns	N.C.			4164 list 3
OKI	MSM3764-15	150 ns	N.C.		4164 list 2	4164 list 3
OKI	MSM3764-20	200 ns	N.C.	photo	4164 list 2	4164 list 3		As shown in photo, the prefix of "MS" is not printed on the chip.
OKI	MSM3764A-12	120 ns	N.C.				datasheet
OKI	MSM3764A-15	150 ns	N.C.	photo			datasheet	As shown in photo, the prefix of "MS" is not printed on the chip.

Samsung	KM4164B-10	100 ns	N.C.		4164 list 3		datasheet	Datasheet indicates plastic case.
Samsung	KM4164B-12	120 ns	N.C.	photo	4164 list 3		datasheet	Datasheet indicates plastic case.
Samsung	KM4164B-15	150 ns	N.C.		4164 list 3		datasheet	Datasheet indicates plastic case.

Sanyo	LM3364-15	150 ns	?		4164 list 1			Pin 1 use unknown.
Sanyo	LM3364-20	200 ns	?		4164 list 1			Pin 1 use unknown.

Texas Instruments	SMJ4164-12	120 ns	N.C.			4164 list 3		Ceramic case.
Texas Instruments	SMJ4164-15	150 ns	N.C.			4164 list 3		Ceramic case.
Texas Instruments	SMJ4164-20	200 ns	N.C.			4164 list 3		Ceramic case.
Texas Instruments	TMS4164-12	120 ns	N.C.			4164 list 3	datasheet
Texas Instruments	TMS4164-15	150 ns	N.C.		4164 list 2	4164 list 3	datasheet
Texas Instruments	TMS4164-20	200 ns	N.C.	photo	4164 list 2	4164 list 3	datasheet	Photo is of a unit within a late IBM 5150
Texas Instruments	TMS4164-25	250 ns	N.C.			4164 list 3

Thompson	MKB4564P-82	150 ns	N.C.		4164 list 3
Thompson	MKB4564P-83	200 ns	N.C.		4164 list 3

Toshiba	TMM4164C-3	150 ns	N.C.			4164 list 3		Ceramic case.
Toshiba	TMM4164C-4	200 ns	N.C.			4164 list 3		Ceramic case.
Toshiba	TMM4164P-3	150 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Toshiba	TMM4164P-4	200 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.
Toshiba	TMM4164AP-12	120 ns	N.C.				datasheet	Plastic case.
Toshiba	TMM4164AP-15	150 ns	N.C.	photo	4164 list 2		datasheet	Plastic case.
Toshiba	TMM4164AP-20	200 ns	N.C.		4164 list 2		datasheet	Plastic case.
Toshiba	TMMS4164-20	200 ns	?		4164 list 2			Pin 1 use unknown, however, inclusion on list#2 suggests N.C.