The AS7C31025B is a high-performance CMOS 1,048,576-bit Static Random Access Memory (SRAM) device organized as 131,072 x 8
bits. It is designed for memory applications where fast data access, low power, and simple interfacing are desired.
Equal address access and cycle times (t
AA
, t
RC
, t
WC
) of 10/12/15/20 ns with output enable access times (t
OE
) of 5, 6, 7, 8 ns are ideal for
high-performance applications. The chip enable input CE permits easy memory and expansion with multiple-bank memory systems.
When CE is high the device enters standby mode. A write cycle is accomplished by asserting write enable (WE) and chip enable (CE). Data
on the input pins I/O0 through I/O7 is written on the rising edge of WE (write cycle 1) or CE (write cycle 2). To avoid bus contention,
external devices should drive I/O pins only after outputs have been disabled with
output enable (
OE
) or write enable
(WE).
A read cycle is accomplished by asserting output enable (OE) and chip enable (CE), with write enable (WE) high. The chip drives I/O pins
with the data word referenced by the input address. When either chip enable or output enable is inactive or write enable is active, output
drivers stay in high-impedance mode.
All chip inputs and outputs are TTL-compatible, and operation is from a single 3.3 V supply. The AS7C31025B is packaged in common
industry standard packages.
Absolute maximum ratings
Parameter
Voltage on V
CC
relative to GND
Voltage on any pin relative to GND
Power dissipation
Storage temperature (plastic)
Ambient temperature with V
CC
applied
DC current into outputs (low)
Symbol
V
t1
V
t2
P
D
T
stg
T
bias
I
OUT
Min
–0.50
–0.50
–
–65
–55
–
Max
+5.0
V
CC
+ 0.5
1.0
+150
+125
20
Unit
V
V
W
o
C
o
C
mA
NOTE: Stresses greater than those listed under
Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress rating only and func-
tional operation of the device at these or any other conditions outside those indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect reliability.
Truth table
CE
H
L
L
L
WE
X
H
H
L
OE
X
H
L
X
Data
High Z
High Z
D
OUT
D
IN
Mode
Standby (I
SB
, I
SB1
)
Output disable (I
CC
)
Read (I
CC
)
Write (I
CC
)
Key: X = don’t care, L = low, H = high.
3/24/04, v. 1.3
Alliance Semiconductor
P. 2 of 9
AS7C31025B
®
Recommended operating conditions
Parameter
Supply voltage
Input voltage
Ambient operating temperature
V
IL
= -1.0V for pulse width less than 5ns
V
IH =
V
CC
+ 1.5V for pulse width less than 5ns
Symbol
V
CC
V
IH
V
IL
T
A
T
A
Min
3.0
2.0
–0.5
0
–40
Nominal
3.3
–
–
–
–
Max
3.6
V
CC
+ 0.5
0.8
70
85
Unit
V
V
V
o
C
o
C
DC operating characteristics (over the operating range)
[size=4] ESD (electrostatic discharge) is one of the most serious failure mechanisms in CMOS circuits, which can cause the circuit to burn itself. This paper discusses the necessity of ESD protection ...
There was a previous version with 7 uses
Diodes are very commonly used basic components. This article mainly introduces some functions of diodes, such as anti-reverse, rectification, voltage regulatio...
Digi-key joins hands with senior technicians to focus on the growth of electronic engineers and provide you with wonderful video tutorials
The video tutorial is full of useful information~Currently av...
I received the board today. I like it very much. It has rich interfaces and peripherals. After getting it, I can't wait to prepare the development environment and routine testing.My STM32CubeMX is an ...
[i=s]This post was last edited by MianQi on 2021-9-6 12:00[/i]Since actual measurements show that the output is still a switch quantity, the configuration of the previously tested D1CS-D54 capacitive ...
Previously, we did a lot of tests on 1024-point CFFT. The test results show that
The ADC clock of AT32F421 is more stable and accurate than other clocks at 20M.
And CFFT-1024 can be completed within 2...
The STM32F767's FMC divides the external memory into six fixed-size 256M storage areas, as shown below: The FMC memory block 1 (Bank1) of STM32F767 is divided into 4 areas, ea...[Details]
According to foreign media reports, as more and more people choose to work or study at home during the COVID-19 pandemic, the global market demand for semiconductor products such as chips used in con...[Details]
According to a Twitter user, the OnePlus 7 series will be released globally on May 14, which is less than a month away. It is reported that in addition to the regular OnePlus 7, the next generation o...[Details]
On May 8, it was reported that ASML's most advanced EUV lithography machine orders this year have been monopolized by Intel, with the price of a single unit exceeding 2.5 billion yuan.
It is r...[Details]
TFN FB11 Cable Fault Tester Overview TFN FB11 cable fault tester is the result of TFN's continuous improvement and innovation over the years. The technical level of the whole system has reached the i...[Details]
With the rapid development of computer and related microelectronics and optoelectronics technology, LED display screens have rapidly grown into mainstream flat panel display products with their h...[Details]
How does the car DSC control system
ESP electronic stability system is no longer a high-end active safety device, and more and more models have included it as standard configuration. The effec...[Details]
Recently, the topic of #iPhone 13 pink screen# ranked first on Weibo's hot search list, attracting a lot of attention from netizens. After all, this year's thirteen-spice attribute has attracte...[Details]
Recently, four ministries and commissions including the Ministry of Industry and Information Technology jointly issued the "Notice on Carrying out Pilot Work on the Access and Road Access of Intellig...[Details]
WPG Holdings announced that its subsidiary, World Peace, has launched a 77GHz millimeter-wave radar solution for advanced driver assistance systems based on Texas Instruments (TI) products. The s...[Details]
In the 21st century, energy issues are becoming increasingly prominent, and energy conservation and environmental protection have become a major factor that must be considered in many designs. This de...[Details]
To optimize drilling processes and reduce operating costs, Baker Hughes' Dynamics & Telemetry group developed a sequence prediction algorithm for fast and reliable decoding of downhole data during ...[Details]
Function of the circuit
Thermistor is a temperature sensing element with a negative temperature coefficient. Because its detection sensitivity is higher than other sensors, it c...[Details]
The annual Chengdu Auto Show has opened again. Perhaps this year’s auto market has experienced turbulence and involution, and everyone’s new product rhythm has become more scattered. After all, frequ...[Details]
On October 14, the Yunnan Provincial Development and Reform Commission and the Yunnan Provincial Energy Bureau issued the "Yunnan Province 2024 Second Batch of New Energy Project Development and Const...[Details]
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
