Model 102 RAM: Difference between revisions
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Original: [http://pdf1.alldatasheet.com/datasheet-pdf/view/107834/NEC/UPD4364C-15LL.html NEC uPD4364C-20L] | Original: [http://pdf1.alldatasheet.com/datasheet-pdf/view/107834/NEC/UPD4364C-15LL.html NEC uPD4364C-20L] | ||
General specs: | General specs:<br> | ||
Generic part number: 6264 | |||
* | *5v | ||
*SRAM (static ram) | |||
*8Kx8 | |||
*CMOS | *CMOS | ||
* | *DIP-28 600 mil package | ||
*Parallel (ie 2764 eprom pin compatible) | |||
*2764 eprom pin compatible | *200ns or faster | ||
*200ns or faster | *Low power or extra low power (1) | ||
*Low power or extra low power ( | |||
Example parts: | |||
:Alliance AS6C6264-55PCN https://www.digikey.com/en/products/detail/alliance-memory-inc/AS6C6264-55PCN/4234595 | |||
:NEC uPD4364C-##LL, uPD4364C-##L | :NEC uPD4364C-##LL, uPD4364C-##L | ||
:Hitachi HM6264ALP-##L | :Hitachi HM6264ALP-##L | ||
| Line 22: | Line 22: | ||
:Hyundai HY6264ALLP-##, HY6264ALP-##, HY6264LP-## | :Hyundai HY6264ALLP-##, HY6264ALP-##, HY6264LP-## | ||
-## = any speed<br> | |||
L, LP = low power<br> | |||
LL, LLP = extra low power | |||
(1) Standby current needs to be as low as possible for battery life because the ram is kept powered at all times, even while the machine is turned off. | |||
Most old parts have seperate low power and extra low power versions, usually but not always indicated by L or LL somewhere in the part number. | |||
Most new parts base/only version is the same or better than an older parts "LL" version. The current Alliance part with no special modifiers is better than even the "LL" versions of most of the older parts. | |||
Latest revision as of 21:36, 28 August 2024
Original: NEC uPD4364C-20L
General specs:
Generic part number: 6264
- 5v
- SRAM (static ram)
- 8Kx8
- CMOS
- DIP-28 600 mil package
- Parallel (ie 2764 eprom pin compatible)
- 200ns or faster
- Low power or extra low power (1)
Example parts:
- Alliance AS6C6264-55PCN https://www.digikey.com/en/products/detail/alliance-memory-inc/AS6C6264-55PCN/4234595
- NEC uPD4364C-##LL, uPD4364C-##L
- Hitachi HM6264ALP-##L
- Sony CXK5864BP-##L
- SRM2264LC##
- Toshiba TC5564PL-##
- MOS MS6264L-##PC
- Hyundai HY6264ALLP-##, HY6264ALP-##, HY6264LP-##
-## = any speed
L, LP = low power
LL, LLP = extra low power
(1) Standby current needs to be as low as possible for battery life because the ram is kept powered at all times, even while the machine is turned off.
Most old parts have seperate low power and extra low power versions, usually but not always indicated by L or LL somewhere in the part number.
Most new parts base/only version is the same or better than an older parts "LL" version. The current Alliance part with no special modifiers is better than even the "LL" versions of most of the older parts.