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Número de pieza | TC55BS8128J-12 | |
Descripción | 128K x 8-Bit Synchronous Static RAM | |
Fabricantes | Toshiba | |
Logotipo | ||
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No Preview Available ! TOSHIBA
131,072 WORD x 8 BIT SYNCHRONOUS STATIC RAM
with Input Registers, Output Registers and Pass-Through Feature
1l:55~128J-I0/12
PRELIMINARY
Description
The TC55BS8128J is a 1,048,576 bit synchronous static random access memory fabricated using BiCMOS technology and
organized as 131,072 words by 8 bits. The TC55BS8128J is similar to the TC55BS8125J but has separate data inputs and
outputs and a write-cycle pass-through feature.
Designed for pipelined architectures, this device has internal input and output registers which latch on the positive edge of an
external clock (ClK). All address; data, and control signals are latched. The setup and hold times for the inputs are 2ns and 1ns
respectively. Synchronous SRAMs can lead to faster, more robust system operation by virtually eliminating the timing skew
problems associated with conventional asynchronous SRAMs. For example, write operations are internally self-timed when
initiated - eliminating the need for accurate write pulse generation and timing by the memory controller or microprocessor. A
pass-through feature during write cycles allows the outputs to follow the inputs with a one clock cycle delay. For read cycles, data
is available one clock cycle after the address is latched. All inputs and outputs are TTL compatible.
The TC55BS8128J is available in a 40-pin, 400mil SOJ package suitable for high density assembly.
Features
• Fast cycle time
- TC55BS8128J-10 10ns (max.)
- TC55BS8128J-12 12ns (max.)
• Fast clock access time
- TC55BS8128J-10 5ns (max.)
- TC55BS8128J-12 6ns (max.)
• Input and output registers for synchronous operation
• Data pass-through for write cycles
• Single power supply: 5V±10%
• Separate data inputs and outputs
• Package: JEDEC standard pinout
- 40-pin, 400mil SOJ: SOJ40-P-400
Pin Names
AO - A16
DO - 07
00-07
ClK
CE
WE
V DD
GND
Address Inputs
Data Inputs
Data Outputs
Clock Input
Chip Enable Input
Write Enable Input
Power (+5V)
Ground
Pin Connection (Top View)
TC55BS8128J
A3
A2
Al
AO
CE
DO
01
QO
Ql
VDO
GND
Q2
Q3
02
03
WE
A16
A1S
A14
A13
A4
AS
A6
A7
A8
07
06
Q7
Q6
GND
VDD
QS
Q4
OS
04
ClK
A9
A10
All
A12
TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
C-13
1 page TC55BS8128J-10112
Timing Waveforms
Read Cycle
Standby
Static RAM
Read
Read
Read
Write Cycle and Pass-Through Mode
Standby
tACK
Write and
Pass - Through
Write and
Pass - Through
Pass - Through
PRELIMINARY
tACK
TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
C-17
5 Page |
Páginas | Total 5 Páginas | |
PDF Descargar | [ Datasheet TC55BS8128J-12.PDF ] |
Número de pieza | Descripción | Fabricantes |
TC55BS8128J-10 | 128K x 8-Bit Synchronous Static RAM | Toshiba |
TC55BS8128J-12 | 128K x 8-Bit Synchronous Static RAM | Toshiba |
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