AT91SAM7S256D-AU-999Alternatives & Equivalent Parts
About AT91SAM7S256D-AU-999
AT91SAM7S256D-AU-999 is a Integrated Circuit component manufactured by Microchip. It comes in a Quad Flat Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Get one quote covering all 7 alternatives for AT91SAM7S256D-AU-999 — response within 24 hours.
Specification Comparison
| Parameter | AT91SAM7S256D-AU-999Source | AT91SAM7X512-AU | MCP23S08T-E/SS | AT24C256C-XHL-B | AT91SAM7S256-AU-001 | AT91SAM7S64C-AU | AT91SAM7S512B-AU | AT91SAM7S64B-AU |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip |
| Package Type | Quad Flat Packages | Quad Flat Packages | Small Outline Packages | Small Outline Packages | Quad Flat Packages | Quad Flat Packages | Quad Flat Packages | Quad Flat Packages |
| Pin Count | 64 | 100 | 20 | 8 | 48 | 64 | 64 | 64 |
| Temperature Range | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | — | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $8.8100 | $14.2230 | $1.1105 | $0.4250 | $11.4900 | $5.5761 | $5.0349 | $14.5980 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | OBSOLETE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
| Electrical Parameters | ||||||||
| Pbfree Code | Yes | — | Yes | Yes | — | Yes | Yes | — |
| Manufacturer Package Code | LQFP-64 | — | SSOP-20 | TSSOP-8 | — | LQFP-64 | LQFP-64 | — |
| Factory Lead Time | 1 Week | — | 6 Weeks | 9 Weeks | — | 8 Weeks | 4 Weeks | — |
| YTEOL | 14 | 0 | 9 | 14 | 8.23 | 14 | 14 | 8.23 |
| Has ADC | YES | YES | — | — | YES | YES | YES | YES |
| Bit Size | 32 | 32 | — | — | 32 | 32 | 32 | 32 |
| Boundary Scan | YES | YES | — | — | YES | YES | YES | YES |
| CPU Family | ARM7TDMI | — | — | — | ARM7 | ARM7 | ARM7 | ARM7 |
| Clock Frequency-Max | 20 MHz | 50 MHz | — | — | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| DAC Channels | NO | NO | — | — | NO | NO | NO | NO |
| DMA Channels | YES | YES | — | — | YES | YES | YES | YES |
| Format | FIXED POINT | — | — | — | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT |
| Integrated Cache | NO | — | — | — | NO | NO | NO | NO |
| JESD-30 Code | S-PQFP-G64 | S-PQFP-G100 | — | R-PDSO-G8 | S-PQFP-G64 | S-PQFP-G64 | S-PQFP-G64 | S-PQFP-G64 |
| JESD-609 Code | e3 | — | — | e4 | — | e3 | e3 | — |
| Low Power Mode | NO | — | — | — | YES | YES | YES | YES |
| Number of External Interrupts | 2 | — | — | — | 2 | 2 | 2 | 2 |
| Number of I/O Lines | 32 | 60 | — | — | 32 | 32 | 32 | 32 |
| Number of Serial I/Os | 2 | — | — | — | 3 | 3 | 3 | 2 |
| Number of Timers | 3 | — | — | — | 3 | 3 | 3 | 5 |
| On Chip Data RAM Width | 8 | — | — | — | 8 | 8 | 8 | 8 |
| On Chip Program ROM Width | 8 | 8 | — | — | 8 | 8 | 8 | 8 |
| PWM Channels | YES | YES | — | — | YES | YES | YES | YES |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | QFP64,.47SQ,20 | — | — | TSSOP8,.25 | QFP64,.47SQ,20 | QFP64,.47SQ,20 | QFP64,.47SQ,20 | QFP64,.47SQ,20 |
| Package Shape | SQUARE | SQUARE | — | RECTANGULAR | SQUARE | SQUARE | SQUARE | SQUARE |
| Package Style | FLATPACK, LOW PROFILE, FINE PITCH | FLATPACK, LOW PROFILE, FINE PITCH | — | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH | FLATPACK, LOW PROFILE, FINE PITCH | FLATPACK, LOW PROFILE, FINE PITCH | FLATPACK, LOW PROFILE, FINE PITCH | FLATPACK, LOW PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 | 260 | — | 260 | — | 260 | 260 | — |
| RAM (bytes) | 65536 | 131072 | — | — | 65536 | 16384 | 65536 | 16384 |
| ROM (words) | 262144 | 524288 | — | — | 262144 | 65536 | 524288 | 65536 |
| ROM Programmability | FLASH | FLASH | — | — | FLASH | FLASH | FLASH | FLASH |
| Speed | 55 MHz | 55 MHz | — | — | 55 MHz | 55 MHz | 55 MHz | 55 MHz |
| Supply Voltage-Max | 1.95 V | 1.95 V | — | — | 1.95 V | 1.95 V | 1.95 V | 1.95 V |
| Supply Voltage-Min | 1.8 V | 1.8 V | — | — | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Supply Voltage-Nom | 1.8 V | 1.8 V | — | — | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Surface Mount | YES | YES | — | YES | YES | YES | YES | YES |
| Technology | CMOS | CMOS | — | CMOS | CMOS | CMOS | CMOS | CMOS |
| Temperature Grade | INDUSTRIAL | INDUSTRIAL | — | INDUSTRIAL | — | INDUSTRIAL | INDUSTRIAL | — |
| Terminal Finish | Matte Tin (Sn) | — | — | Nickel/Palladium/Gold (Ni/Pd/Au) | — | Matte Tin (Sn) | Matte Tin (Sn) | — |
| Terminal Form | GULL WING | GULL WING | — | GULL WING | GULL WING | GULL WING | GULL WING | GULL WING |
| Terminal Pitch | 0.5 mm | 0.5 mm | — | 0.65 mm | 0.5 mm | 0.5 mm | 0.5 mm | 0.5 mm |
| Terminal Position | QUAD | QUAD | — | DUAL | QUAD | QUAD | QUAD | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 | 30 | — | 40 | — | 30 | 30 | — |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | PARALLEL IO PORT, GENERAL PURPOSE | — | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC |
| ## AT91SAM7S256D-AU-999 Alternates Showing results | Image | — | — | — | — | — | — | — |
| Qualification Status | — | — | Not Qualified | Not Qualified | — | Not Qualified | Not Qualified | — |
| ## MCP23S08T-E/SS Alternates Showing results | — | — | Image | — | — | — | — | — |
| Clock Frequency-Max (fCLK) | — | — | — | 1 MHz | — | — | — | — |
| Data Retention Time-Min | — | — | — | 40 | — | — | — | — |
| Endurance | — | — | — | 1000000 Write/Erase Cycles | — | — | — | — |
| I2C Control Byte | — | — | — | 1010DDDR | — | — | — | — |
| Memory Density | — | — | — | 262144 bit | — | — | — | — |
| Memory IC Type | — | — | — | EEPROM | — | — | — | — |
| Memory Width | — | — | — | 8 | — | — | — | — |
| Number of Functions | — | — | — | 1 | — | — | — | — |
| Number of Ports | — | — | — | 1 | — | — | — | — |
| Number of Words | — | — | — | 32768 words | — | — | — | — |
| Number of Words Code | — | — | — | 32000 | — | — | — | — |
| Operating Mode | — | — | — | SYNCHRONOUS | — | — | — | — |
| Organization | — | — | — | 32KX8 | — | — | — | — |
| Parallel/Serial | — | — | — | SERIAL | — | — | — | — |
| Programming Voltage | — | — | — | 2.5 V | — | — | — | — |
| Serial Bus Type | — | — | — | I2C | — | — | — | — |
| Standby Current-Max | — | — | — | 0.000006 A | — | — | — | — |
| Supply Current-Max | — | — | — | 0.003 mA | — | — | — | — |
| Supply Voltage-Max (Vsup) | — | — | — | 5.5 V | — | — | — | — |
| Supply Voltage-Min (Vsup) | — | — | — | 1.7 V | — | — | — | — |
| Supply Voltage-Nom (Vsup) | — | — | — | 2.5 V | — | — | — | — |
| Write Cycle Time-Max (tWC) | — | — | — | 5 ms | — | — | — | — |
| Write Protection | — | — | — | HARDWARE/SOFTWARE | — | — | — | — |
| ## AT24C256C-XHL-B Alternates Showing results | — | — | — | Image | — | — | — | — |
| Number of DMA Channels | — | — | — | — | 11 | 11 | 11 | 11 |
| Additional Feature | — | — | — | — | — | ALSO REQUIRES 3.3V SUPPLY | ALSO REQUIRES 3.3V SUPPLY | — |
| ## AT91SAM7S64B-AU Alternates Showing results | — | — | — | — | — | — | — | Image |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 7 alternatives for AT91SAM7S256D-AU-999 — response within 24 hours.
Quick Links
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RISC Microcontroller, 32-Bit, FLASH, ARM7 CPU, 55MHz, CMOS, PQFP64
RISC Microcontroller, 32-Bit, FLASH, ARM7 CPU, 55MHz, CMOS, PQFP64
RISC Microcontroller, 32-Bit, FLASH, ARM7 CPU, 55MHz, CMOS, PQFP64
Why Look for Alternatives?
Finding alternatives for AT91SAM7S256D-AU-999 is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating AT91SAM7S256D-AU-999 replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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FAQ
What is equivalent to AT91SAM7S256D-AU-999?
Known equivalents for AT91SAM7S256D-AU-999 include AT91SAM7X512-AU, MCP23S08T-E/SS, AT24C256C-XHL-B. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of AT91SAM7S256D-AU-999?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify AT91SAM7S256D-AU-999 alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.