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PDF TC55257BPL-85L Data sheet ( Hoja de datos )

Número de pieza TC55257BPL-85L
Descripción SILICON GATE CMOS STATIC RAM
Fabricantes Toshiba 
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No Preview Available ! TC55257BPL-85L Hoja de datos, Descripción, Manual

TOSHIBA
TC55257BPL/BFL/BSPL/BFlL/BTRL-85L/IOL
SILICON GATE CMOS
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 illP.) 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 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
• Low power dissipation:
• Standby current:
• Single 5V power supply
• Access time (max.)
Access Time
Chip Enable Access Time
Output Enable Time
27.5mW/MHz (typ.)
2~ (max.) at Ta = 25°C
TC55257BPl/ TC55257BPl/
BFl/BSPl/BFTl/ BFl/BSPl/BFTl/
BTRl-85l
BTRl-10l
85ns
85ns
45ns
100ns
100ns
50ns
• Power down feature:
CE
• Data retention supply voltage:
2.0 - 5.5V
• Inputs and outputs TIL compatible
• Package
TC55257BPL: DIP28-P-600
TC55257BFL : SOP28-P-450
TC55257BSPL : DIP28-P-300B
TC55257BFTL : TSOP28-P
Pin Names
TC55257BTRL : TSOP28-P-A
Pin Connection (Top View)
(forward type)
Al4
Al2
A7
1101
1/02
1/03
GNO
liDO
R/W
A13
A8
A9
Al1
OE
Al0
CE
1108
1/07
1/06
1/05
1/04
14
28
( reverse type)
28 15
AO - A14
RIW
OE
IT
1/01 - 1/08
VDD
GND
Address Inputs
ReadlWrite Control Input
Output Enable Input
Chip Enable Input
Data Input/Output
Power (+5V)
Ground
PIN NO.
PIN NAME
PIN NO.
PIN NAME
12
OE A11
15 16
A2 A1
3 4 5 6 7 8 9 10 11 12 13 14
Ag As A13 RIW VDD A14 A12 A7 A6 As A4 A3
17 18 19 20 21 22 23 24 25 26 27 28
Ao 1/01 1/02 1/03 GND 1/04 1/05 1/06 1/07 1/08 ct: AlO
TOSHIEIA AMERlCA ELECTRONIC COMPONENTS. INC.
A-9

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TC55257BPL-85L pdf
Timing Waveforms
Read Cycle (1)
ADDRESSES
Static RAM
TC55257BPLlBFLlBSPLlBFTLlBTRL-85L110L
toE
DOUT
Write Cycle 1 (4) (R/W Controlled Write)
ADDRESSES
UNKNOWN
OUTPUT DATA VALID
twc
R/W
DOUT
DATA STABLE
TOSHIBA AMERICA ELECTRONIC COMPONENTS. INC.
A-13

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