IS61LV6424 |
ISSI® |
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64K x 24 HIGH-SPEED CMOS STATIC RAM WITH 3.3V SUPPLY
DECEMBER 2000
FEATURES
•High-speed access time: 9, 10, 12, 15 ns
•CMOS low power operation
594 mW (max.) operating @ 9 ns
36 mW (max.) CMOS standby
•TTL compatible interface levels
•Single 3.3V power supply
•Fully static operation: no clock or refresh required
•Three state outputs
•Available in 100-pin TQFP
•Industrial temperature available
DESCRIPTION
The ISSI IS61LV6424 is a high-speed, static RAM organized as 65,536 words by 24 bits. It is fabricated using ISSI's highperformance CMOS technology. This highly reliable process coupled with innovative circuit design techniques, yields access times as fast as 9 ns with low power consumption.
When CE1 is HIGH or CE2 is LOW (deselected), the device assumes a standby mode at which the power dissipation can be reduced down with CMOS input levels.
Easy memory expansion is provided by using Chip Enable and Output Enable inputs, CE1, CE2, and OE. The active LOW Write Enable (WE) controls both writing and reading of the memory.
The IS61LV6424 is packaged in the JEDEC standard 100-pin TQFP
FUNCTIONAL BLOCK DIAGRAM
VCC
GND
A0-A14 |
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ROW |
64K x 24 |
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DECODER |
MEMORY ARRAY |
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A15 |
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MULTIPLEX |
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COLUMN |
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V/S |
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CONTROL |
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DECODER |
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CE1 |
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CONTROL |
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CE2 |
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I/O DATA |
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CIRCUIT |
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CIRCUIT |
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WE |
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ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which may appear in this publication. © Copyright 2000, Integrated Silicon Solution, Inc.
Integrated Silicon Solution, Inc. — 1-800-379-4774 |
1 |
Rev. A
12/19/00
IS61LV6424 |
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ISSI® |
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PIN CONFIGURATION |
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100-Pin TQFP |
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A14 |
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A15 |
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CE1 CE2 |
NC |
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NC |
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NC |
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X/Y |
V/S |
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VCC |
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GND |
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NC |
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WE |
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NC |
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OE NC NC NC A0 A1 |
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100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 |
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NC |
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1 |
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80 |
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NC |
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NC |
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NC |
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NC |
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I/O12 |
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75 |
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I/O11 |
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I/O13 |
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74 |
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I/O10 |
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I/O14 |
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73 |
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I/O9 |
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I/O15 |
9 |
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72 |
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I/O8 |
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GNDQ |
10 |
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71 |
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GNDQ |
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VCCQ |
11 |
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70 |
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VCCQ |
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I/O16 |
12 |
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69 |
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I/O7 |
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I/O17 |
13 |
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68 |
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I/O6 |
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NC |
14 |
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67 |
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GND |
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VCC |
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66 |
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NC |
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65 |
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VCC |
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GND |
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64 |
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NC |
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I/O18 |
18 |
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63 |
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I/O5 |
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I/O19 |
19 |
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62 |
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I/O4 |
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VCCQ |
20 |
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61 |
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GNDQ |
21 |
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60 |
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I/O20 |
22 |
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59 |
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I/O21 |
23 |
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58 |
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I/O22 |
24 |
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57 |
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I/O1 |
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I/O23 |
25 |
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I/O0 |
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NC |
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NC |
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NC |
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NC |
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NC |
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NC |
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30 |
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NC |
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31 32 33 34 35 36 37 |
38 |
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46 47 48 49 50 |
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NC |
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A13 |
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A12 A11 |
A10 |
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A9 |
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A8 |
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NC |
NC |
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GND |
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VCC |
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NC |
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NC |
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A7 |
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A6 |
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A5 A4 A3 A2 NC |
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PIN DESCRIPTIONS |
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A0-A14 |
Address Inputs |
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A15, X/Y |
Multiplexed Address |
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I/O0-I/O23 |
Data Inputs/Outputs |
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CE1, CE2 |
Chip Enable Input |
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OE |
Output Enable Input |
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WE |
Write Enable Input |
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V/S |
Address Multiplexer |
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NC |
No Connection |
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VCC |
Power |
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VCCQ |
Isolated Output Buffer Supply |
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GND |
Ground |
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GNDQ |
Isolated Output Buffer Ground |
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2 |
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Integrated Silicon Solution, Inc. — 1-800-379-4774 |
Rev. A
12/19/00
IS61LV6424 |
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ISSI® |
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TRUTH TABLE |
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Mode |
CE1 |
CE2 |
OE |
WE |
V/S |
I/O0-I/O23 |
Vcc Current |
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Not Selected |
H |
X |
X |
X |
X |
High-Z |
ISB1, ISB2 |
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X |
L |
X |
X |
X |
High-Z |
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Read Using X/Y |
L |
H |
L |
H |
H |
DOUT |
ICC |
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Read Using A15 |
L |
H |
L |
H |
L |
DOUT |
ICC |
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Write Using X/Y |
L |
H |
X |
L |
H |
DIN |
ICC |
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Write Using A15 |
L |
H |
X |
L |
L |
DIN |
ICC |
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Output Disable |
L |
H |
H |
H |
X |
High-Z |
ICC |
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ABSOLUTE MAXIMUM RATINGS(1)
Symbol |
Parameter |
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Value |
Unit |
VCC |
Power Supply Voltage Relative to GND |
–0.5 to 5.0 |
V |
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VTERM |
Terminal Voltage with Respect to GND |
–0.5 to Vcc + 0.5 |
V |
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TSTG |
Storage Temperature |
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–65 to + 150 |
°C |
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TBIAS |
Temperature Under Bias: |
Com. |
–10 to + 85 |
°C |
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Ind. |
–45 to + 90 |
°C |
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PT |
Power Dissipation |
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2.0 |
W |
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IOUT |
DC Output Current |
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±20 |
mA |
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Note:
1.Stress 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 reliability.
OPERATING RANGE
Range |
Ambient Temperature |
VCC (9, 10 ns) |
VCC (12, 15 ns) |
Commercial |
0°C to +70°C |
3.3V + 10%, – 5% |
3.3V ± 10% |
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Industrial |
–40°C to +85°C |
3.3V + 10%, – 5% |
3.3V ± 10% |
DC ELECTRICAL CHARACTERISTICS (Over Operating Range)
Symbol |
Parameter |
Test Conditions |
Min. |
Max. |
Unit |
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VOH |
Output HIGH Voltage |
VCC = Min., IOH = –4.0 mA |
2.4 |
— |
V |
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VOL |
Output LOW Voltage |
VCC = Min., IOL = 8.0 mA |
— |
0.4 |
V |
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VIH |
Input HIGH Voltage |
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2.2 |
VCC + 0.3 |
V |
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VIL |
Input LOW Voltage(1) |
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–0.3 |
0.8 |
V |
ILI |
Input Leakage |
GND - VIN - VCC |
–1 |
1 |
µA |
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ILO |
Output Leakage |
GND - VOUT - VCC, Outputs Disabled |
–1 |
1 |
µA |
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Note:
1.VIL (min.) = –0.3V DC; VIL (min.) = –2.0V AC (pulse width - 2.0 ns).
VIH (max.) = VCC + 0.3V DC; VIH (max.) = VCC + 2.0V AC (pulse width - 2.0 ns).
Integrated Silicon Solution, Inc. — 1-800-379-4774 |
3 |
Rev. A
12/19/00