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  ON Semiconductor Electronic Components Datasheet  

N25S818HA Datasheet

256 kb Low Power Serial SRAMs

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N25S818HA
256 kb Low Power Serial
SRAMs
32 k x 8 Bit Organization
Introduction
The ON Semiconductor serial SRAM family includes several
integrated memory devices including this 256 kb serially accessed
Static Random Access Memory, internally organized as 32 k words by
8 bits. The devices are designed and fabricated using
ON Semiconductor’s advanced CMOS technology to provide both
highspeed performance and low power. The devices operate with a
single chip select (CS) input and use a simple Serial Peripheral
Interface (SPI) serial bus. A single data in and data out line is used
along with a clock to access data within the devices. The N25S818HA
devices include a HOLD pin that allows communication to the device
to be paused. While paused, input transitions will be ignored. The
devices can operate over a wide temperature range of 40°C to +85°C
and can be available in several standard package offerings.
Features
Power Supply Range: 1.7 to 1.95 V
Very Low Standby Current: Typical Isb as low as 200 nA
Very Low Operating Current: As low as 3 mA
Simple Memory Control:
Single chip select (CS)
Serial input (SI) and serial output (SO)
Flexible Operating Modes:
Word read and write
Page mode (32 word page)
Burst mode (full array)
Organization: 32 k x 8 bit
Self Timed Write Cycles
Builtin Write Protection (CS High)
HOLD Pin for Pausing Communication
High Reliability: Unlimited write cycles
Green SOIC and TSSOP
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
MARKING
DIAGRAMS
TSSOP8
T SUFFIX
CASE 948AL
C124
XXXXYZZ
SOIC8
S SUFFIX
CASE 751BD
C114
XXXXYZZ
XXXX
Y
ZZ
= Date Code
= Assembly Code
= Lot Traceability
ORDERING INFORMATION
Device
Package
Shipping
N25S818HAS21I
N25S818HAT21I
N25S818HAS21IT
N25S818HAT21IT
SOIC8
(PbFree)
TSSOP8
(PbFree)
SOIC8
(PbFree)
TSSOP8
(PbFree)
100 Units / Tube
100 Units / Tube
3000 / Tape &
Reel
3000 / Tape &
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2012
June, 2012 Rev. 12
1
Publication Order Number:
N25S818HA/D


  ON Semiconductor Electronic Components Datasheet  

N25S818HA Datasheet

256 kb Low Power Serial SRAMs

No Preview Available !

CS
SO
NC
VSS
1
N25S818HA
TSSOP8
VCC
HOLD
SCK
SI
1
CS
SO
NC
VSS
Figure 1. Pin Connections
(Top View)
SOIC8
VCC
HOLD
SCK
SI
Table 1. DEVICE OPTIONS
Part Number
N25S818HAS2
N25S818HAT2
Density
256 Kb
Power
Supply (V)
1.8
Speed
(MHz)
16
Table 2. PIN NAMES
Pin Name
CS
SCK
SI
SO
HOLD
NC
VCC
VSS
Pin Function
Chip Select Input
Serial Clock Input
Serial Data Input
Serial Data Output
Hold Input
No Connect
Power
Ground
Package
SOIC
TSSOP
Typical Standby
Current
200 nA
Read/Write
Operating Current
3 mA @ 1 Mhz
SCK
HOLD
Clock
Circuitry
CS
Decode
Logic
SI
Data In
Receiver
SRAM
Array
SO
Data Out
Buffer
Figure 2. Functional Block Diagram
http://onsemi.com
2


Part Number N25S818HA
Description 256 kb Low Power Serial SRAMs
Maker ON Semiconductor
Total Page 12 Pages
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