MOSEL V62C318256

MOSEL VITELIC
PRELIMINARY
V62C318256
2.7 VOLT 32K X 8 STATIC RAM
■ Packages
– 28-pin TSOP (Standard)
– 28-pin 300 mil SOP (450 mil pin-to-pin)
Features
■ High-speed: 35, 70 ns
■ Ultra low DC operating current of 2mA (max.)
■ Low Power Dissipation:
– TTL Standby: 0.5 mA (Max.)
– CMOS Standby: 10 µA (Max.)
■ Fully static operation
■ All inputs and outputs directly compatible
■ Three state outputs
■ Ultra low data retention current (VCC = 2V)
■ Extended operating voltage: 2.7V–3.6V
Description
The V62C318256 is a 262,144-bit static random
access memory organized as 32,768 words by 8
bits. It is built with MOSEL VITELIC’s high
performance CMOS process. Inputs and threestate outputs are TTL compatible and allow for
direct interfacing with common system bus
structures.
Functional Block Diagram
A0
VCC
Row
Decoder
GND
512 x 512
Memory Array
A8
I/O0
Column I/O
Input
Data
Circuit
Column Decoder
I/O7
A9
CE
OE
WE
A14
Control
Circuit
318256 01
Device Usage Chart
Operating
Temperature
Range
Package Outline
Access Time (ns)
Power
T
F
35
70
L
LL
Temperature
Mark
0°C to 70 °C
•
•
•
•
•
•
Blank
–40°C to +85°C
•
•
•
•
I
V62C318256 Rev. 1.7 July 2001
1
MOSEL VITELIC
V62C318256
Pin Descriptions
WE
Write Enable Input
An active LOW input, WE input controls read and
write operations. When CE and WE inputs are both
LOW, the data present on the I/O pins will be
written into the selected memory location.
A0–A14
Address Inputs
These 15 address inputs select one of the 32,768 x
8 bit segments in the RAM.
CE
Chip Enable Inputs
CE is an active LOW input. Chip Enable must be
LOW when reading from or writing to the device.
When HIGH, the device is in standby mode with I/O
pins in the high impedance state.
I/O0–I/O7 Data Input and Data Output Ports
These 8 bidirectional ports are used to read data
from and write data into the RAM.
OE
Output Enable Input
The Output Enable input is active LOW. When OE
is LOW with CE LOW and WE HIGH, data of the
selected memory location will be available on the
I/O pins. When OE is HIGH, the I/O pins will be in
the high impedance state.
VCC
Power Supply
GND
Ground
Pin Configurations (Top View)
28-Pin SOP
28-Pin TSOP (Standard)
A14
1
28
VCC
A12
2
27
WE
A7
3
26
A13
A6
4
25
A8
A5
5
24
A9
A4
6
23
A11
A3
7
22
OE
A2
8
21
A10
A1
9
20
CE
A0
10
19
I/O7
I/O0
11
18
I/O6
I/O1
12
17
I/O5
I/O2
13
16
I/O4
GND
14
15
I/O3
OE
A11
A9
A8
A13
WE
VCC
A14
A12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
318256 03
318256 02
V62C318256 Rev. 1.7 July 2001
2
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
MOSEL VITELIC
V62C318256
Part Number Information
V
MOSEL-VITELIC
MANUFACTURED
62
C
31
8
256
–
TEMP.
SRAM
FAMILY
OPERATING
VOLTAGE
DENSITY
256K
62 = ASYNCHRONOUS, SLOW
PKG
SPEED
BLANK = 0°C to 70°C
I = -40°C to +85°C
PWR.
35 ns
70 ns
C = CMOS PROCESS
T = TSOP STANDARD
F = 330 mil SOP (450 mil pin-to-pin)
31 = 2.7V – 3.6V
ORGANIZATION
L = LOW POWER
LL = DOUBLE LOW POWER
8 = 8-bit
318256 05
Absolute Maximum Ratings (1)
Symbol
Parameter
Commercial
Industrial
Units
VCC
Supply Voltage
-0.5 to VCC+0.5
-0.5 to VCC+0.5
V
VN
Input Voltage
-0.5 to VCC+0.5
-0.5 to VCC+0.5
V
VDQ
Input/Output Voltage Applied
VCC + 0.3
VCC + 0.3
V
TBIAS
Temperature Under Bias
-10 to +125
-65 to +135
°C
TSTG
Storage Temperature
-55 to +125
-65 to +150
°C
NOTE:
1. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reli-
Truth Table
ability.
Capacitance*
TA = 25°C, f = 1.0MHz
Symbol
Parameter
CIN
Input Capacitance
COUT
Output Capacitance
Conditions
Max.
Unit
VIN = 0V
6
pF
VI/O = 0V
8
pF
NOTE:
* This parameter is guaranteed and not tested.
Mode
CE
OE
WE
I/O
Operation
Standby
H
X
X
High Z
Read
L
L
H
DOUT
Read
L
H
H
High Z
Write
L
X
L
DIN
NOTE:
X = Don’t Care, L = LOW, H = HIGH
V62C318256 Rev. 1.7 July 2001
3
MOSEL VITELIC
V62C318256
DC Electrical Characteristics (over all temperature ranges, VCC = 2.7V – 3.6V)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Units
VCC
Power Supply Voltage
2.7
—
3.6
V
VIL
Input LOW Voltage(1,2)
-0.3
—
0.4
V
VIH
Input HIGH Voltage(1)
2.2
—
VCC+0.3
V
IIL
Input Leakage Current
VCC = Max, VIN = 0V to VCC
-2
—
2
µA
IOL
Output Leakage Current
VCC = Max, CE = VIH, VOUT = 0V to
VCC
-2
—
2
µA
VOL
Output LOW Voltage
VCC = Min, IOL = 2.1mA
—
—
0.4
V
VOH
Output HIGH Voltage
VCC = Min, IOH = -1mA
2.4
—
—
V
Com.(4)
Ind.
Units
Symbol
Parameter
ICC (read)
Operating Power Supply Current, CE = VIL, WE = VIH
Output Open, VCC = Max., f = 0
2
2
mA
ICC (write)
Operating Power Supply Current, CE = VIL, WE = VIL
Output Open, VCC = Max., f = 0
20
20
mA
ICC1
Average Operating Current, CE ≤ VIL Output Open,
VCC = Max., f = fMAX(3)
40
40
mA
ISB
TTL Standby Current
CE ≥ VIH, VCC = Max.
L
2
3
mA
LL
1
1
CMOS Standby Current, CE ≥ VCC – 0.2V,
VIN ≥ VCC – 0.2V or VIN ≤ 0.2V, VCC = Max.
L
50
60
LL
15
20
ISB1
NOTES:
1. These are absolute values with respect to device ground and all overshoots due to system or tester noise are included.
2. VIL (Min.) = -3.0V for pulse width < 20ns.
3. fMAX = 1/tRC.
4. Maximum values.
AC Test Conditions
Key to Switching Waveforms
Input Pulse Levels
0 to 3V
Input Rise and Fall Times
5 ns
Timing Reference Levels
1.5V
Output Load
WAVEFORM
see below
INPUTS
OUTPUTS
MUST BE
STEADY
WILL BE
STEADY
MAY CHANGE
FROM H TO L
WILL BE
CHANGING
FROM H TO L
MAY CHANGE
FROM L TO H
WILL BE
CHANGING
FROM L TO H
DON'T CARE:
ANY CHANGE
PERMITTED
CHANGING:
STATE
UNKNOWN
DOES NOT
APPLY
CENTER
LINE IS HIGH
IMPEDANCE
“OFF” STATE
AC Test Loads and Waveforms
+3V
1103 Ω
I/O Pins
1554 Ω
CL = 30 pF*
* Includes scope and jig capacitance
318256 07
V62C318256 Rev. 1.7 July 2001
4
µA
MOSEL VITELIC
V62C318256
Data Retention Characteristics
Symbol
VDR
ICCDR
VCC for Data Retention
tR
Typ.(2)
Max.
Units
2.0
—
3.6
V
L
—
1
40
µA
LL
—
0.5
10
L
—
—
45
LL
—
—
15
0
—
—
ns
tRC(1)
—
—
ns
CE ≥ VCC – 0.2V
Data Retention Current
VDR = 3.0V, CE ≥ VDR – 0.2V
Com’l
Ind.
tCDR
Min.
Parameter
Chip Deselect to Data Retention Time
Operation Recovery Time (see Retention Waveform)
NOTES:
1. tRC = Read Cycle Time
2. TA = +25°C.
Low VCC Data Retention Waveform
Data Retention Mode
VCC
2.7V
VDR ≥ 2V
tCDR
CE
2.2V
2.7V
tR
CE ≥ VCC – 0.2V
2.2V
318256 06
V62C318256 Rev. 1.7 July 2001
5
MOSEL VITELIC
V62C318256
AC Electrical Characteristics
(over all temperature ranges)
Read Cycle
Parameter
Name
-35
Parameter
-70
Min.
Max.
Min.
Max.
Unit
tRC
Read Cycle Time
35
—
70
—
ns
tAA
Address Access Time
—
35
—
70
ns
tACS
Chip Enable Access Time
—
35
—
70
ns
tOE
Output Enable to Output Valid
—
15
—
30
ns
tCLZ
Chip Enable to Output in Low Z
5
—
5
—
ns
tOLZ
Output Enable to Output in Low Z
5
—
5
—
ns
tCHZ
Chip Disable to Output in High Z
0
20
0
20
ns
tOHZ
Output Disable to Output in High Z
0
20
0
20
ns
tOH
Output Hold from Address Change
5
—
5
—
ns
Write Cycle
Parameter
Name
-35
Parameter
-70
Min.
Max.
Min.
Max.
Unit
tWC
Write Cycle Time
35
—
70
—
ns
tCW
Chip Enable to End of Write
35
—
70
—
ns
tAS
Address Setup Time
0
—
0
—
ns
tAW
Address Valid to End of Write
35
—
70
—
ns
tWP
Write Pulse Width
25
—
50
—
ns
tWR
Write Recovery Time
0
—
0
—
ns
tWHZ
Write to Output High-Z
0
20
0
25
ns
tDW
Data Setup to End of Write
25
—
30
—
ns
tDH
Data Hold from End of Write
0
—
0
—
ns
tOHZ
Output Disable to Output in High Z
0
25
0
30
ns
tOW
Output Active from End of Write
5
—
5
—
ns
V62C318256 Rev. 1.7 July 2001
6
MOSEL VITELIC
V62C318256
Switching Waveforms (Read Cycle)
Read Cycle 1(1, 2)
tRC
ADDRESS
tAA
OE
tOE
tOLZ
tOHZ(5)
I/O
318256 12
Read Cycle 2(1, 2, 4)
tRC
ADDRESS
tOH
tAA
tOH
I/O
318256 13
Read Cycle 3(1, 3, 4)
ADDRESS
tACS
CE
tCLZ(5)
tCHZ(5)
I/O
318256 14
NOTES:
1. WE = VIH.
2. CE = VIL.
3. Address valid prior to or coincident with CE transition LOW.
4. OE = VIL.
5. Transition is measured ±500mV from steady state with CL = 5pF. This parameter is guaranteed and not 100% tested.
V62C318256 Rev. 1.7 July 2001
7
MOSEL VITELIC
V62C318256
Switching Waveforms (Write Cycle)
Write Cycle 1 (WE Controlled)(4)
tWC
ADDRESS
tWR(2)
tCW(6)
CE
tAW
tAS
WE
tWP(1)
OUTPUT
tWHZ(3)
tDW
tDH
INPUT
318256 15
Write Cycle 2 (CE Controlled)(4)
tWC
ADDRESS
tAS
tWR(2)
tCW(6)
CE
tAW
WE
OUTPUT
Hi-Z
tDW
tDH
(5)
INPUT
318256 11
NOTES:
1. The internal write time of the memory is defined by the overlap of CE active and WE low. Both signals must be active to initiate and
any one signal can terminate a write by going inactive. The data input setup and hold timing should be referenced to the second
transition edge of the signal that terminates the write.
2. tWR is measured from the earlier of CE or WE going HIGH.
3. During this period, I/O pins are in the output state so that the input signals of opposite phase to the outputs must not be applied.
4. OE = VIL or VIH. However it is recommended to keep OE at VIH during write cycle to avoid bus contention.
5. If CE is LOW during this period, I/O pins are in the output state. Then the data input signals of opposite phase to the outputs must
not be applied to them.
6. tCW is measured from CE going LOW to the end of write.
V62C318256 Rev. 1.7 July 2001
8
MOSEL VITELIC
V62C318256
Package Diagrams
28-pin 330 mil SOP
Units in inches [mm]
0 MIN
(STAND OFF)
0.339 ± 0.008
[8.61 ± 0.203]
0.402 ±0.012
[10.21 ± 0.203]
0.465 ± 0.012
[11.81 ± 0.305]
0.031 ± 0.008
[0.787 ± 0.203]
INDEX
0.006 ± 0.002
[0.152 ± 0.051]
0.713 [18.11] TYP
0.112 [0.285] MAX
"A"
0.098 ± 0.005
[2.49 ± 0.127]
0.008 [0.203]
View "A"
0.050 [1.27] TYP
0.018 ± 0.004
[0.457 ± 0.102]
0.024 [0.610]
0.008 [0.203] MAX
0.027 [0.686] MAX
V62C318256 Rev. 1.7 July 2001
9
MOSEL VITELIC
V62C318256
Package Diagrams (Cont’d)
28-Pin TSOP
Unit in inches [mm]
0.463 ±0.003
[11.76 ± 0.076]
0.046 ±0.004
[1.17 ± 0.102]
0.528 ±0.008
[13.41 ± 0.203]
0.315 ±0.004
[8.00 ± 0.102]
+0.007
0.020 –0.008
+0.178
0.508 –0.305
V62C318256 Rev. 1.7 July 2001
0.006 ±0.002
[0.152 ± 0.051]
0.022 [0.559] BSC
10
0.006 ±0.004
[0.152 ± 0.102]
MOSEL VITELIC
V62C318256
Notes
V62C318256 Rev. 1.7 July 2001
11
MOSEL VITELIC
WORLDWIDE OFFICES
V62C318256
U.S.A.
TAIWAN
SINGAPORE
UK & IRELAND
3910 NORTH FIRST STREET
SAN JOSE, CA 95134
PHONE: 408-433-6000
FAX: 408-433-0952
7F, NO. 102
MIN-CHUAN E. ROAD, SEC. 3
TAIPEI
PHONE: 886-2-2545-1213
FAX: 886-2-2545-1209
10 ANSON ROAD #23-13
INTERNATIONAL PLAZA
SINGAPORE 079903
PHONE: 65-3231801
FAX: 65-3237013
NO 19 LI HSIN ROAD
SCIENCE BASED IND. PARK
HSIN CHU, TAIWAN, R.O.C.
PHONE: 886-3-579-5888
FAX: 886-3-566-5888
JAPAN
SUITE 50, GROVEWOOD
BUSINESS CENTRE
STRATHCLYDE BUSINESS
PARK
BELLSHILL, LANARKSHIRE,
SCOTLAND, ML4 3NQ
PHONE: 44-1698-748515
FAX: 44-1698-748516
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2-14-6 SHINTOMI, CHUO-KU
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FAX: 03-3537-1402
GERMANY
(CONTINENTAL
EUROPE & ISRAEL)
BENZSTRASSE 32
71083 HERRENBERG
GERMANY
PHONE: +49 7032 2796-0
FAX: +49 7032 2796 22
U.S. SALES OFFICES
NORTHWESTERN
SOUTHWESTERN
3910 NORTH FIRST STREET
SAN JOSE, CA 95134
PHONE: 408-433-6000
FAX: 408-433-0952
302 N. EL CAMINO REAL #200
SAN CLEMENTE, CA 92672
PHONE: 949-361-7873
FAX: 949-361-7807
© Copyright 1998, MOSEL VITELIC Inc.
The information in this document is subject to change without
notice.
MOSEL VITELIC makes no commitment to update or keep current the information contained in this document. No part of this
document may be copied or reproduced in any form or by any
means without the prior written consent of MOSEL-VITELIC.
MOSEL VITELIC
CENTRAL,
NORTHEASTERN &
SOUTHEASTERN
604 FIELDWOOD CIRCLE
RICHARDSON, TX 75081
PHONE: 214-826-6176
FAX: 214-828-9754
7/01
Printed in U.S.A.
MOSEL VITELIC subjects its products to normal quality control
sampling techniques which are intended to provide an assurance
of high quality products suitable for usual commercial applications. MOSEL VITELIC does not do testing appropriate to provide
100% product quality assurance and does not assume any liability for consequential or incidental arising from any use of its products. If such products are to be used in applications in which
personal injury might occur from failure, purchaser must do its
own quality assurance testing appropriate to such applications.
3910 N. First Street, San Jose, CA 95134-1501 Ph: (408) 433-6000 Fax: (408) 433-0952 Tlx: 371-9461