A0 – A18 Address Inputs
DQ0-DQ15 Data Inputs/Outputs
CE1#,CE2 Chip Enable Input
OE# Output Enable
WE# Read/Write Control Input
LB#,UB# Data Byte Control Inputs
GND Ground
V
DD
Power Supply
NC No Connection
Overview
The EM565161 is an 8M-bit SRAM organized as 512K words by 16 bits. It is designed with advanced CMOS
technology. This Device operates from a single power supply. Advanced circuit technology provides both high
speed and low power. It is automatically placed in low-power mode when CE1# or both UB# and LB# are
asserted high or CE2 is asserted low. There are three control inputs. CE1# and CE2 are used to select the
device and for data retention control, and output enable (OE#) provides fast memor y access. Data byte control
pin (LB#,UB#) provides lower and upper byte access. This device is well suited to various microprocessor
system applications where high speed, low power and battery backup are required. And, with a guaranteed
operating range from –40°C to 85°C, the EM565161 can be used in environments exhibiting extreme
temperature conditions.
Etron Technology, Inc., reserves the right to make changes to its products and specifications without notice.
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Block Diagram
EM565161
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
A0
A18
MEMORY
CELL ARRAY
512kx16
SENSE AMP
COLUMN ADDRESS
DECODER
VDD
GND
WE#
UB#
LB#
OE#
CE1#
CE2
POWER DO WN
CIRCUIT
Preliminary2 Rev 0.9Jan 2002
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Operating Mode
Mode CE1# CE2 OE# WE# LB# UB# DQ0~DQ7 DQ8~DQ15 Power
EM565161
Read L H L H
Write L H X L
L H H H X X High-Z High-Z I
Output Disabled
L H X X H H High-Z High-Z I
H X X X X X
Standby
X L X X X X
X X X X H H
Note:X=don’t care. H=logic high. L=logic low.
Absolute Maximum Ratings
L L D
H L High-Z D
L H D
L L DIN D
H L High-Z DIN I
L H DIN High-Z I
D
OUT
High-Z I
OUT
High-Z High-Z I
I
OUT
I
OUT
I
IN
DDO
DDO
DDO
DDO
DDO
DDO
DDO
DDO
DDS
Supply voltage, VDD -0.3 to +4.6V
Input voltages, VIN -0.3 to +4.6V
Input and output voltages, V
Operating temperature, T
Storage temperature, T
Soldering Temperature (10s), T
Power dissipation, PD 1 W
STRG
-0.5 to VDD +0.5V
I/O
OPR
SOLDER
-40 to +85°C
-55 to +150°C
240°C
Preliminary3 Rev 0.9Jan 2002
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EM565161
DC Recommended Operating Conditions (Ta=-40°C to 85°C)
Symbol Parameter Min Typ Max Unit
VDD Power Supply Voltage 2.3 3.0 3.6 V
VIH Input High Voltage 2.2
VIL Input Low Voltage -0.3
VDR Data Retention Supply Voltage 1.0
Note:
(1) Overshoot : VDD +2.0V in case of pulse width ≤ 20ns
(2) Undershoot : -2.0V in case of pulse width ≤ 20ns
(2)
−
−
−
V
DD
+ 0.3
0.6
3.6
(1)
DC Characteristics (Ta = -40°C to 85°C, VDD = 2.3V to 3.6V)
Parameter Symbol Test Conditions Min Typ* Max Unit