STATIC RAM. IS61WV25616EDBLL Datasheet

IS61WV25616EDBLL RAM. Datasheet pdf. Equivalent

Part IS61WV25616EDBLL
Description 256K x 16 HIGH SPEED ASYNCHRONOUS CMOS STATIC RAM
Feature IS61WV25616EDBLL IS64WV25616EDBLL 256K x 16 HIGH SPEED ASYNCHRONOUS CMOS STATIC RAM WITH ECC OCTO.
Manufacture ISSI
Datasheet
Download IS61WV25616EDBLL Datasheet



IS61WV25616EDBLL
IS61WV25616EDBLL
IS64WV25616EDBLL
256K x 16 HIGH SPEED ASYNCHRONOUS
CMOS STATIC RAM WITH ECC
OCTOBER 2011
FEATURES
• High-speed access time: 8, 10 ns
• Low Active Power: 85 mW (typical)
• Low Standby Power: 7 mW (typical)
CMOS standby
• Single power supply
— Vdd 2.4V to 3.6V (10 ns)
— Vdd 3.3V ± 10% (8 ns)
• Fully static operation: no clock or refresh
required
• Three state outputs
• Data control for upper and lower bytes
• Industrial and Automotive temperature support
• Lead-free available
• Error Detection and Error Correction
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION
The ISSI IS61/64WV25616EDBLL is a high-speed,
4,194,304-bit static RAMs organized as 262,144 words
by 16 bits. It is fabricated using ISSI's high-performance
CMOS technology. This highly reliable process coupled
with innovative circuit design techniques, yields high-
performance and low power consumption devices.
When CE is HIGH (deselected), the device assumes a
standby mode at which the power dissipation can be re-
duced down with CMOS input levels.
Easy memory expansion is provided by using Chip Enable
and Output Enable inputs, CE and OE. The active LOW
Write Enable (WE) controls both writing and reading of the
memory. A data byte allows Upper Byte (UB) and Lower
Byte (LB) access.
The IS61/64WV25616EDBLL is packaged in the JEDEC
standard 44-pin TSOP-II and 48-pin Mini BGA (6mm x
8mm).
A0-A17
Decoder
Memory
Lower IO
Array-
256Kx8
ECC
Array-
256K
x4
Memory
Upper IO
Array-
256Kx8
ECC
Array-
256K
x4
IO0-7
IO8-15
8 8 12 8
8
I/O Data
Circuit
8
ECC
12
ECC
48
Column I/O
4
/CE
/OE Control
/WE
/UB
Circuit
/LB
Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without
notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the lat-
est version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reason-
ably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications
unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. — www.issi.com
Rev. A
09/29/2011
1



IS61WV25616EDBLL
IS61/64WV25616EDBLL
TRUTH TABLE
Mode
Not Selected
Output Disabled
Read
Write
I/O PIN
WE CE OE LB UB
I/O0-I/O7
I/O8-I/O15
X H X X X
High-Z
High-Z
H L H X X
X L X H H
High-Z
High-Z
High-Z
High-Z
H L L L H
Dout
High-Z
H L L H L
High-Z
Dout
H L L L L Dout Dout
L L X L H
Din High-Z
L L X H L
High-Z
Din
L L X L L Din Din
Vdd Current
Isb1, Isb2
Icc
Icc
Icc
PIN CONFIGURATIONS
44-Pin TSOP (Type II)
A0
A1
A2
A3
A4
CE
I/O0
I/O1
I/O2
I/O3
VDD
GND
I/O4
I/O5
I/O6
I/O7
WE
A5
A6
A7
A8
A9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
*SOJ package under evaluation.
44 A17
43 A16
42 A15
41 OE
40 UB
39 LB
38 I/O15
37 I/O14
36 I/O13
35 I/O12
34 GND
33 VDD
32 I/O11
31 I/O10
30 I/O9
29 I/O8
28 NC
27 A14
26 A13
25 A12
24 A11
23 A10
PIN DESCRIPTIONS
A0-A17
Address Inputs
I/O0-I/O15
Data Inputs/Outputs
CE Chip Enable Input
OE
Output Enable Input
WE
Write Enable Input
LB Lower-byte Control (I/O0-I/O7)
UB Upper-byte Control (I/O8-I/O15)
NC No Connection
Vdd
Power
GND
Ground
2 Integrated Silicon Solution, Inc. — www.issi.com
Rev. A
09/29/2011





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