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Número de pieza | TC55257BTRL-85LT | |
Descripción | SILICON GATE CMOS STATIC RAM | |
Fabricantes | Toshiba | |
Logotipo | ||
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SILICON GATE CMOS
TC55257BPL/BFL/BSPL/BFIL/BTRL-85/10(Ln
32,768 WORD x 8 BIT STATIC RAM
Description
The TC55257BPL is a 262,144 bit CMOS static random access memory organized as 32,768 words by 8 bits and operated from a
single 5V power supply. Advanced circuit techniques provide both high speed and low power features with an operating current of
5mNMHz (typ.) and a minimum cycle time of 85ns.
When CE is a logical high, the device is placed in a low power standby mode in which the standby current is 2~ at room tem-
perature. The TC55257BPL has two control inputs. Chip enable (CE) allows for device selection and data retention control, while an
output enable input (OE) provides fast memory access. The TC55257BPL is suitable for use in microprocessor systems where high
speed, low power, and battery backup are required. The TC55257BPL-(LT) has an operating temperature range of -20 - 7CfC so it
is suitable for use in low temperature applications.
The TC55257BPL is offered in a standard dual-in-line 28-pin plastic package (0.6/0.3 inch width), a small outline plastic pack-
age, and a thin small outline plastic package (forward type, reverse type).
Features
Pin Connection (Top View)
• Low power dissipation:
• Standby current:
• Single 5V power supply
• Access time (max.)
27.5mW/MHz (typ.)
100~(max.)
A14
A12
A7
TC55257BPL/ TC55257BPL/
BFL/BSPL/BFTL/ BFL/BSPL/BFTL/
BTRL-85(LT)
BTRL-10(LT)
Access Time
Chip Enable Access Time
Output Enable Time
• Power down feature:
CE
• Data retention supply voltage:
• Wide operating temperature:
85ns
85ns
45ns
2.0 - 5.5V
-20 - 70°C
100ns
100ns
50ns
1/01
1/02
1/03
GNO
Voo
RIW
A13
A8
A9
All
oe
Al0
CE
1/08
1/07
1/06
1/05
1104
(forward type)
14
28
(reverse type)
28
• Inputs and outputs TIL compatible
• Package
TC55257BPL(LT): DIP28-P-600
TC55257BFL(LT) : SOP28-P-450
TC55257BSPL(LT) : DIP28-P-300B
Pin Names
TC55257BFTL(LT) : TSOP28-P
TC55257BTRL(LT) : TSOP28-P-A
AO - A14 Address Inputs
RIW ReadlWrite Control Input
OE Output Enable Input
CE Chip Enable Input
1/01 - 1/08 Data Input/Output
Voo Power (+5V)
GND
Ground
PIN NO.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
PIN NAME OE An
Ag
As A'3 RIW Voo A'4 A'2
A7
A6
As
A4
A3
PIN NO.
15 16 17 18 19 20 21 22 23 24 25 26 27 28
PIN NAME A2 A, Ao 1/01 1/02 1/03 GND 1/04 1/05 1/06 1/07 1/08 CE A'0
TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
A-17
1 page Timing Waveforms
Read Cycle (1)
ADDRESSES
Static RAM
TC55257BPUBFUBSPUBFTUBTRL-85/1 O(LT)
Dour
Write Cycle 1 (4) (RIW Controlled Write)
ADDRESSES
R/W
UNKNOWN
OUTPUT DATA VALID
twc
twp
Dour
DATA STABLE
TOSHIBA AMERICA ELECTRONIC, COMPONENTS, INC.
A-21
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet TC55257BTRL-85LT.PDF ] |
Número de pieza | Descripción | Fabricantes |
TC55257BTRL-85L | SILICON GATE CMOS STATIC RAM | Toshiba |
TC55257BTRL-85LT | SILICON GATE CMOS STATIC RAM | Toshiba |
TC55257BTRL-85LV | SILICON GATE CMOS STATIC RAM | Toshiba |
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