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PDF TMM41256T-12 Data sheet ( Hoja de datos )
| Número de pieza | TMM41256T-12 | |
| Descripción | DRAM | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TMM41256T-12 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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TOSHIBA MOS MEMORY PRODUCT
262,144 WORD X 1 BIT DYNAMIC RAM
N-CHANNEL SILICON GATE MOS
TMM41256P/T-12
TMM41256P/T-15
DESCRIPTION
The TMM41256P/T is the new generation dynamic
RAM organized 262,144 words by 1 bit, it is successor
to the industry standard TMM4164AP.
The TMM41256P/T utilizes TOSHI BA's N-channel
Silicon gate process technology as well as advanced
circuit techniques to provide wide operating margins,
both internally and to the system user.
Multiplexed address inputs permit the TMM-
41256P IT to be packaged in a standard 16 pin plastic
DIP and 18 pin plastic leaded chip carner. The
package size provides high system t)lt riensltles and IS
compatible with Widely available al:ltomated testing
and Insertion eqUipment,
System oriented features include sing Ie power
supply of 5V ± 10% tolerance, direct interfacing
capability with high perforrna nce logic families such
as Schottky TTL.
FEATURES
• 262,144 words by 1 bit organization
• Fast access time and cycle time
DEVICE
TMM41256P,'T-12
TMM4125GP 'T-1 5
tRAC
120 ns
150 ns
tCAC
60 ns
75 ns
tRC
220 ns
260 ns
• Single power supply of 5V ± 10% with a built-in
Vss generator
• Low Power:
330mW Operating (MAX.) (TMM41256P/T-12)
275mW Operating (MAX.) (TMM41256P/T-15)
28mVV Stand by (MAX.)
PIN CONNECTION' (TOP VIEW)
• Plastic LCC
• Plastic DIP
• Output unlatched at cycle end allows two-dimen-
sional chip selection
• Common I/O capability using "EARLY WR ITE"
operation
• Read-Modify-Write, RAS-only refresh, Hidden
refresh, and Page Mode capability.
• All inputs and output TTL compatible
• 256 refresh cycles/4ms
• Package
PlastiC DIP
PlastiC Leaded Chip Carrier
TMM41256P
TMM41256T
BLOCK DIAGRAM
.--..<:I Vee
CAS
V"
AS
D,N
:~~ ~ ~ ~
?:
P-IN-N-A~~~
r-[
WRlTE
RAS
AO
3
DOUT
- A-3 -
1 page  
e WRITE CYCLE (EARLY WRITE)
RAS
TMM41256P/T-12
TMM41256P/T-15
ADDRESSES
VIH - - "7"7~r-r"r7-rr7'''''''''
4 -________vIL--:L~~LL~LLLL~~_ _
-f~~~~~~~~~~~~~~~~
DIN
DOUT
VIH-
V IL -
VOH -
VOL-
eREAD-WRITE/READ-MODIFY-WRITE CYCLE
ADDRESSES
DOUT
e "AAs -ONLY" REFRESH CYCLE
VIH - --------~
VIL-
~ Dnot"Clr.
ADDRESSES VIH-
VI L- -'-.L..I..J-L-..i..J-~~
DOUT
VOH- _____________________________
VOL-
OPEN --------------------------------
NoU: CAS - VIH. WAITE - Don't Clr., AS - Don't clr.
~ Oon'te.r.
A-7
5 Page | ||
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