AMI Semiconductor, Inc.
ULP Memory Solutions
670 North McCarthy Blvd. Suite 220
Milpitas, CA 95035
PH: 408-935-7777, FAX: 408-935-7770
N256S0818HDA/N256S0830HDA
Advance Information
256Kb Low Power Serial SRAMs
32K × 8 bit Organization
Overview
The AMI Semiconductor serial SRAM family
includes several integrated memory devices
including this 256Kb serially accessed Static
Random Access Memory, internally organized as
32K words by 8 bits. The devices are designed and
fabricated using AMI’s advanced CMOS
technology to provide both high-speed
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
N256S08xxHDA 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
o
C to +85
o
C and can be available in
several standard package offerings.
Features
• Power Supply Options
1.8V to 3.6V
• Very low standby current
As low as 200nA
• Very low operating current
As low as 500uA
• 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
32K x 8 bit
• Self timed write cycles
• Built-in write protection (CS high)
• HOLD pin for pausing communication
• High reliability
Unlimited write cycles
• RoHS Compliant Packages
Green SOIC and TSSOP
Device Options
Part Number
N256S0818HDA
N256S0830HDA
Density
Power
Supply (V)
1.8
3.0
Speed
(MHz)
20
25
Feature
Typical
Standby
Current
200nA
1uA
Read/Write
Operating Current
500 uA @ 1Mhz
256Kb
HOLD
1
This is a developmental specification and is subject to change without notice.
AMI [ AMI SEMICONDUCTOR ]
