UPD4217405G3-70-7JD Datasheet PDF - NEC
Part Number | UPD4217405G3-70-7JD | |
Description | 16M-BIT DYNAMIC RAM | |
Manufacturers | NEC | |
Logo | ||
There is a preview and UPD4217405G3-70-7JD download ( pdf file ) link at the bottom of this page. Total 30 Pages |
Preview 1 page No Preview Available ! DATA SHEET
MOS INTEGRATED CIRCUIT
µPD42S17405, 4217405
16 M-BIT DYNAMIC RAM
4 M-WORD BY 4-BIT, EDO
Description
The µPD42S17405, 4217405 are 4,194,304 words by 4 bits CMOS dynamic RAMs with optional EDO.
EDO is a kind of the page mode and is useful for the read operation.
Besides, the µPD42S17405 can execute CAS before RAS self refresh.
The µPD42S17405, 4217405 are packaged in 26-pin plastic TSOP (II) and 26-pin plastic SOJ.
Features
• EDO (Hyper page mode)
• 4,194,304 words by 4 bits organization
• Single +5.0 V ±10 % power supply
• Fast access and cycle time
Part number
µPD42S17405-50, 4217405-50
µPD42S17405-60, 4217405-60
µPD42S17405-70, 4217405-70
Power
consumption
Active (MAX.)
660 mW
605 mW
550 mW
Access time
(MAX.)
R/W cycle time
(MIN.)
50 ns
60 ns
70 ns
84 ns
104 ns
124 ns
EDO (Hyper page mode)
cycle time (MIN.)
20 ns
25 ns
30 ns
• µPD42S17405 can execute CAS before RAS self refresh
Part number
µPD42S17405
Refresh cycle
2,048 cycles/128 ms
µPD4217405
2,048 cycles/32 ms
Refresh
CAS before RAS self refresh
CAS before RAS refresh
RAS only refresh
Hidden refresh
CAS before RAS refresh
RAS only refresh
Hidden refresh
Power consumption
at standby (MAX.)
1.4 mW
(CMOS level input)
5.5 mW
(CMOS level input)
The information in this document is subject to change without notice.
Document No. M10067EJ6V0DS00 (6th edition)
Date Published January 1997 N
Printed in Japan
The mark shows major revised points.
©
1995
|
|
µPD42S17405, 4217405
Input/Output Pin Functions
The µPD42S17405, 4217405 have input pins RAS, CAS, WE, OE, A0 to A10 and input/output pins I/O1 to I/O4.
Pin name
Input/Output
Function
RAS
(Row address strobe)
CAS
(Column address strobe)
A0 to A10
(Address inputs)
WE
(Write enable)
OE
(Output enable)
I/O1 to I/O4
(Data inputs/outputs)
Input
Input
Input
Input
Input
Input/Output
RAS activates the sense amplifier by latching a row address and selecting a
corresponding word line.
It refreshes memory cell array of one line selected by the row address.
It also selects the following function.
• CAS before RAS refresh
CAS activates data input/output circuit by latching column address and
selecting a digit line connected with the sense amplifier.
Address bus.
Input total 22-bit of address signal, upper 11-bit and lower 11-bit in sequence
(address multiplex method).
Therefore, one word is selected from 4,194,304-word by 4-bit memory cell
array.
In actual operation, latch row address by specifying row address and
activating RAS.
Then, switch the address bus to column address and activate CAS.
Each address is taken into the device when RAS and CAS are activated.
Therefore, the address input setup time (tASR, tASC) and hold time (tRAH, tCAH)
are specified for the activation of RAS and CAS.
Write control signal.
Write operation is executed by activating RAS, CAS and WE.
Read control signal.
Read operation can be executed by activating RAS, CAS and OE.
If WE is activated during read operation, OE is to be ineffective in the device.
Therefore, read operation cannot be executed.
4-bit data bus.
I/O1 to I/O4 are used to input/output data.
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for UPD4217405G3-70-7JD electronic component. |
Information | Total 30 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ UPD4217405G3-70-7JD.PDF Datasheet ] |
Share Link :
Electronic Components Distributor
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
Part Number | Description | MFRS |
UPD4217405G3-70-7JD | The function is 16M-BIT DYNAMIC RAM. NEC | |
Semiconductors commonly used in industry:
1N4148 |  
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
UPD4
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA |