ADSP-2185LBSTZ-210 vs ADSP-2187LBSTZ-210: Differences, EOL Status and Stock
The ADSP-2185LBSTZ-210 and ADSP-2187LBSTZ-210 are 16-bit, fixed-point digital signal processors from the Analog Devices ADSP-218xL family. Both devices provide 52.5MHz instruction rates, 3.3V operation, two serial ports and the same 100-lead LQFP package.
The main difference is memory capacity. ADSP-2187LBSTZ-210 provides twice the program and data RAM of ADSP-2185LBSTZ-210, making it more suitable for legacy applications with larger programs, buffers or data tables.
Both models have been discontinued. Buyers maintaining existing equipment must now source remaining obsolete inventory or redesign around ADI’s suggested ADSP-BF706BCPZ-4 processor.
ADSP-2185LBSTZ-210 vs ADSP-2187LBSTZ-210 Comparison
| Parameter | ADSP-2185LBSTZ-210 | ADSP-2187LBSTZ-210 |
| Manufacturer | Analog Devices | Analog Devices |
| Processor Family | ADSP-2185L | ADSP-2187L |
| Architecture | ADSP-2100 family, 16-bit fixed-point DSP | ADSP-2100 family, 16-bit fixed-point DSP |
| Instruction Rate | 52.5MHz | 52.5MHz |
| Instruction Cycle | 19ns | 19ns |
| Program RAM | 16K × 24-bit / 48KB | 32K × 24-bit / 96KB |
| Data RAM | 16K × 16-bit / 32KB | 32K × 16-bit / 64KB |
| Total On-Chip RAM | 80KB | 160KB |
| Serial Ports | Two synchronous SPORTs | Two synchronous SPORTs |
| Internal DMA Port | 16-bit IDMA | 16-bit IDMA |
| Byte DMA Port | 8-bit BDMA | 8-bit BDMA |
| External Byte Memory Space | Up to 4MB | Up to 4MB |
| Mode D Support | No | Yes |
| Supply Voltage | 3.3V | 3.3V |
| Package | 100-lead LQFP, 14 × 14mm body | 100-lead LQFP, 14 × 14mm body |
| Temperature Range | −40°C to +85°C ambient | −40°C to +85°C ambient |
| RoHS Version | Yes, indicated by “Z” | Yes, indicated by “Z” |
| Lifecycle Status | Obsolete | Obsolete |
| ADI-Suggested Replacement | ADSP-BF706BCPZ-4 | ADSP-BF706BCPZ-4 |
What Is the Main Difference?
The primary difference is the amount of on-chip SRAM.
ADSP-2185LBSTZ-210 contains:
16K × 24-bit program RAM
16K × 16-bit data RAM
80KB total on-chip memory
ADSP-2187LBSTZ-210 contains:
32K × 24-bit program RAM
32K × 16-bit data RAM
160KB total on-chip memory
The ADSP-2187L therefore doubles both program and data memory while retaining the same instruction rate, voltage, package and temperature grade.
ADSP-2187L also supports Mode D operation, which provides an additional host-mode IDMA acknowledge configuration. Designs that use Mode D should not assume identical behavior on ADSP-2185L.
ADSP-BF706BCPZ-4 Replacement
ADI identifies ADSP-BF706BCPZ-4 as the suggested replacement for both discontinued devices.
| Parameter | ADSP-2185L / ADSP-2187L | ADSP-BF706BCPZ-4 |
| Processor Architecture | ADSP-2100 family DSP | Blackfin+ DSP |
| Maximum Speed | 52.5MHz | 400MHz |
| On-Chip Memory | 80KB or 160KB | 1024KB |
| Package | 100-lead LQFP | 88-lead LFCSP with exposed pad |
| Package Size | 14 × 14mm body | 12 × 12mm |
| Pin-Compatible | — | No |
| Migration Requirement | Existing legacy platform | Hardware and software redesign |
Stock and RFQ Information
ADSP-2185LBSTZ-210 and ADSP-2187LBSTZ-210 availability changes quickly because neither part is still being manufactured.
When requesting stock, provide:
Complete manufacturer part number
Required quantity
Acceptable date-code range
Packaging requirements
Delivery destination
Required delivery date
Current quantity, manufacturer marking, lot/date code, packaging condition, price and lead time should be confirmed with each quotation.
Frequently Asked Questions
What is the main difference between ADSP-2185LBSTZ-210 and ADSP-2187LBSTZ-210?
The main difference is on-chip RAM. ADSP-2185LBSTZ-210 has 80KB, while ADSP-2187LBSTZ-210 has 160KB. Their speed, package, supply voltage and temperature ratings are the same.
Does “-210” mean that these processors operate at 210MHz?
No. The ADI ordering guide specifies an instruction rate of 52.5MHz for both models. The “-210” suffix is a manufacturer speed-grade code and should not be interpreted as a 210MHz clock frequency.
Can ADSP-2187LBSTZ-210 replace ADSP-2185LBSTZ-210?
It may be possible because the two devices belong to the pin-compatible ADSP-218xL family and use the same package and speed grade. However, firmware, memory configuration, boot modes and product qualification must be reviewed before substitution.
Are ADSP-2185LBSTZ-210 and ADSP-2187LBSTZ-210 discontinued?
Yes. Both models are listed in ADI PDN 24_0080. The last-time-buy date was February 28, 2025, and the last-time-ship date was February 27, 2026.
Is ADSP-BF706BCPZ-4 a drop-in replacement?
No. ADSP-BF706BCPZ-4 uses a different Blackfin+ architecture and an 88-lead LFCSP package. ADI states that hardware and software redesign are required.
How can I request current stock?
Send the exact part number, required quantity, acceptable date code and delivery destination. Stock, pricing and lead time will be confirmed with the quotation.
Request ADSP-2185L and ADSP-2187L Stock
DataStorageIC supports RFQs for remaining obsolete inventory of:
ADSP-2185LBSTZ-210
ADSP-2187LBSTZ-210
Send us your required part number, quantity and delivery destination to receive current availability, lot information, price and lead time.
Submit your ADSP-2185LBSTZ-210 or ADSP-2187LBSTZ-210 RFQ today.
