|
|
Part: MSM514221B
Category:
Memory
-> FIFO
-> 1 Mb
Description: 262,263-word X 4-bit Field Memory
Company: Oki Semiconductor
Datasheet: Download MSM514221B datasheet File size : 644 kB
Request For quote: Find where to buy MSM514221B
Datasheet text preview:
E2L0029-17-Y1
¡ Semiconductor MSM514221B
¡ Semiconductor 262,263-Word ¥ 4-Bit Field Memory
This version: M514221B MS Jan. 1998 Previous version: Dec. 1996
DESCRIRTION
The OKI MSM514221B is a high performance 1-Mbit, 256K ¥ 4-bit, Field Memory. It is designed for high-speed serial access applications such as HDTVs, conventional NTSC TVs, VTRs, digital movies and Multi-media systems. It is a FRAM for wide or low end use as general commodity TVs and VTRs, exclusively. The MSM514221B is not designed for the other use or high end use in medical systems, professional graphics systems which require long term picture, and data storage systems and others. The 1-Mbit capacity fits one field of a conventional NTSC TV screen. Each of the 4-bit planes has separate serial write and read ports. These employ independent control clocks to support asynchronous read and write operations. Different clock rates are also supported that allow alternate data rates between write and read data streams. The MSM514221B provides high speed FIFO, First-In First-Out, operation without external refreshing: it refreshes its DRAM storage cells automatically, so that it appears fully static to the users. Moreover, fully static type memory cells and decoders for serial access enable refresh free serial access operation, so that the serial read and/or write control clock can be halted high or low for any duration as long as the power is on. Internal conflicts of memory access and refreshing operations are prevented by special arbitration logic. The MSM514221B's function is simple, and similar to a digital delay device whose delay-bitlength is easily set by reset timing. The delay length, number of read delay clocks between write and read, is determined by externally controlled write and read reset timings. Additional SRAM serial registers, or line buffers for the initial access of 256 ¥ 4-bit enable high speed first-bit-access with no clock delay just after the write or read reset timings. The MSM514221B is similar in operation and functionality to OKI 2-Mbit Field Memory MSM518221.
1/15
¡ Semiconductor
MSM514221B
FEATURES
· Single power supply: 5 V ±10% · 512 Rows ¥ 512 Column ¥ 4 bits · Fast FIFO (First-in First-out)operation · High speed asynchronous serial access Read/Write cycle time 30 ns/40 ns/60 ns Access time 25 ns/30 ns/50 ns · Functional compatibility with OKI MSM518221 · Self refresh (No refresh control is required) · Package options: 16-pin 300 mil plastic DIP (DIP16-P-300-2.54-W1) 26/20-pin 300 mil plastic SOJ (SOJ26/20-P-300-1.27) 20-pin 400 mil plastic ZIP (ZIP20-P-400-1.27)
(Product : MSM514221B-xxRS) (Product : MSM514221B-xxJS) (Product : MSM514221B-xxZS) xx indicates speed rank.
PRODUCT FAMILY
Family MSM514221B-30RS MSM514221B-40RS MSM514221B-60RS MSM514221B-30JS MSM514221B-40JS MSM514221B-60JS MSM514221B-30ZS MSM514221B-40ZS MSM514221B-60ZS Access Time (Max.) 25 ns 30 ns 50 ns 25 ns 30 ns 50 ns 25 ns 30 ns 50 ns Cycle Time (Min.) 30 ns 40 ns 60 ns 30 ns 40 ns 60 ns 30 ns 40 ns 60 ns 400 mil 20-pin ZIP 300 mil 26/20-pin SOJ 300 mil 16-pin DIP Package
2/15
¡ Semiconductor
MSM514221B
PIN CONFIGURATION (TOP VIEW)
WE 1 RSTW 2 SWCK 3 DIN0 4 DIN1 5 DIN2 6 DIN3 7 VSS 8
16 VCC 15 RE 14 RSTR 13 SRCK 12 DOUT0 11 DOUT1 10 DOUT2 9 DOUT3 16-Pin Plastic DIP
RSTW 2 SWCK 3
Pin Name SWCK SRCK WE RE RSTW RSTR DIN0 - 3 DOUT0 - 3 VCC VSS NC
WE 1 DIN0 4 NC 5 NC 9 DIN1 10 DIN2 11 DIN3 12 VSS 13 26/20-Pin Plastic SOJ
Serial Write Clock Serial Read Clock Write Enable Read Enable Write Reset Clock Read Reset Clock Data Input Data Output Ground (0 V) No Connection
26 VCC
SRCK RE WE SWCK NC
1 3 5 7 9
25 RE
2 RSTR 4 VCC 6 RSTW 8 DIN0 NO LEAD
24 RSTR 23 SRCK 22 NC 18 NC 17 DOUT0 16 DOUT1 15 DOUT2 14 DOUT3
NC 11 DIN1 13 DIN3 15 DOUT3 17 DOUT1 19
12 NC 14 DIN2 16 VSS 18 DOUT2 20 DOUT0
20-Pin Plastic ZIP
Function
Power Supply (5 V)
3/15
Others parts begin by ms
|
|
|
