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PDF TC55257CPI-85 Data sheet ( Hoja de datos )
| Número de pieza | TC55257CPI-85 | |
| Descripción | SILICON GATE CMOS STATIC RAM | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA
1l:55257CPI/CF1/CSPI/CF1l/C1lU~5/10
SILICON GATE CMOS
PRELIMINARY
32,768 WORD x 8 BIT STATIC RAM
Description
The TC55257CPI 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 i!YP.) 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 21lA at room tem-
perature. The TC55257CPI 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 TC55257CPI is suitable for use in microprocessor systems where high
speed, low power, and battery backup are required. The TC55257CPI is guaranteed over an operating temperature range
of -40 - 85°C so the TC55257CPI is suitable for use in wide operating temperature systems.
The TC55257CPI 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.)
27.5mW/MHz (typ.)
2001lA (max.)
TC55257CPI/CFI/CSPI/CFTI/CTRI
Access Time
CE Access Time
OE Access Time
-85
85ns
85ns
45ns
-10
100ns
100ns
50ns
• Power down feature:
CE
• Data retention supply voltage:
2.0 - 5.5V
• Inputs and outputs TIL compatible
• Wide operating temperature: -40 - 85°C
• Package
TC55257CPI : DIP28-P-600
Pin Names
TC55257CFI
TC55257CSPI
TC55257CFTI
TC55257CTRI
: SOP28-P-450
: DIP28-P-300B
: TSOP28-P
: TSOP28-P-A
Pin Connection (Top View)
o 28 PIN DIP & SOP
o 28 PIN TSOP
A14
A12
A7
A6
AS
A2
A1
AO
ItOl
1/02
1/03
GNO
voo
RIW
All
A8
A9
All
OE
Al0
CE
1108
1/07
1106
1105
1/04
(forward type)
~4
28
(reverse type)
1~
28 B
AO - A14 Address Inputs
RIW
ReadlWrite Control Input
OE Output Enable Input
CE Chip Enable Input
1/01 - 1/08 Data Input/Output
VDD
GND
Power (+5V)
Ground
PIN NO.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
PIN NAME OE A11
Ag
As A13 RIW VDD A14 A12
A7
A6
A5
A4
A3
PIN NO.
15 16 17 18 19 20 21 22 23 24 25 26 27 28
PIN NAME A2 A1 Ao 1/01 1/02 1/03 GND 1/04 1/05 1/06 1/07 1/08 CE A10
TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
A-67
1 page  
Timing Waveforms
Read Cycle (1)
ADDRESSES
Static RAM
TC55257CPI/CFI/CSPI/CFTI/CTRI-85/10
DOUT
Write Cycle 1 (4) (RIW Controlled Write)
ADDRESSES
PJW
UNKNOWN
OUTPUT DATA VALID
twc
twp
DOUT
tos
DATA STABLE
PRELIMINARY
TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
A-71
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet TC55257CPI-85.PDF ] | |
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