Features: `AS7C1024A (5V version)` AS7C31024A (3.3V version)` Industrial and commercial temperatures` Organization: 131,072 words x 8 bits`High speed- 10/12/15/20 ns address access time- 5, 6, 7, 8 ns output enable access time` Low power consumption: ACTIVE- 853 mW (AS7C1024A) / max @ 10 ns- 522 m...
AS7C1024A-20STC: Features: `AS7C1024A (5V version)` AS7C31024A (3.3V version)` Industrial and commercial temperatures` Organization: 131,072 words x 8 bits`High speed- 10/12/15/20 ns address access time- 5, 6, 7, 8 ...
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` AS7C1024A (5V version)
` AS7C31024A (3.3V version)
` Industrial and commercial temperatures
` Organization: 131,072 words x 8 bits
`High speed
- 10/12/15/20 ns address access time
- 5, 6, 7, 8 ns output enable access time
` Low power consumption: ACTIVE
- 853 mW (AS7C1024A) / max @ 10 ns
- 522 mW (AS7C31024A) / max @ 10 ns
` Low power consumption: STANDBY
- 55 mW (AS7C1024A) / max CMOS
- 36 mW (AS7C31024A) / max CMOS
` Latest 6T 0.25u CMOS technology
` Easy memory expansion with CE1 , CE2, OE inputs
` TTL/LVTTL-compatible, three-state I/O
` 32-pin JEDEC standard packages
- 300 mil SOJ
- 400 mil SOJ
-8 * 20mm TSOP 1
- 8 x 13.4mm sTSOP 1
` ESD protection 2000 volts
`Latch-up current 200 mA
Parameter | Symbol | Min | Max | Unit | |
Voltage on VCC relative to GND | AS7C1024A | Vt1 | -0.50 | +7.0 | V |
AS7C31024A | Vt1 | 0.50 | +5.0 | ||
Voltage on any I/O pin relative to GND | Both | Vt2 | 0.50 | VCC+ 0.50 | V |
Power dissipation | Both | PD | 1.0 | W | |
Storage temperature (plastic) | Both | Tstg | 65 | +150 | |
Temperature with VCC applied |
Both | Tbias | 55 | +125 | |
DC output current (low) | Both | IOUT | 20 | mA |
Equal address access of AS7C1024A-20STC and cycle times (tAA , t RC , tWC ) of 10/12/15/20 ns with output enable access times (tOE ) of 5/6/7/8 ns are ideal for high performance applications. Active high and low chip enables (CE1 , CE2) permit easy memory expansion with multiple-bank systems.
When CE1 is high the devices enter standby mode. If inputs are still toggling, the device will consume I power. If the bus is SB static, then full standby power is reached (ISB1 ). For example, the AS7C31024A is guaranteed not to exceed 55mW under nominal full standby conditions.
A write cycle is accomplished by asserting write enable (WE ) and both chip enables (CE1 , CE2). Data on the input pins I/O0 through I/O7 is written on the rising edge of WE (write cycle 1) or the active-to-inactive edge of CE1 or CE2 (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 both chip enables (CE1 , CE2), with write enable (WE ) high. The chips drive I/O pins with the data word referenced by the input address. When either chip enable is inactive, output enable is inactive, or write enable is active,output drivers stay in high-impedance mode.