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.