Part A
ADSP-21992YBC
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8845 Stückzahl
- Series
- Embedded (Digital Signal Processors)
Replacement verdict
Not a drop-in replacement
The ADSP-BF548BBCZ-5A and ADSP-21992YBC are not drop-in replacements for one another. They belong to different Blackfin processor generations with distinct core architectures, memory organizations, peripheral sets, and package footprints, so substituting one for the other requires full hardware and firmware redesign rather than a direct swap.
Different processor core
Different memory architecture
Different peripheral set
Different package footprint
Parts at a glance
Part B
ADSP-BF548BBCZ-5A
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6104 Stückzahl
- Package
- LFBGA-400
- Series
- Embedded (Digital Signal Processors)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADSP-BF548BBCZ-5A | ADSP-21992YBC | Why it matters |
|---|---|---|---|
| Processor Core | Blackfin (16/32-bit fixed-point DSP with MCU features) | ADSP-219x (16-bit fixed-point DSP) | Different core architectures mean instruction sets, toolchains, and peripheral models are not binary- or code-compatible, so direct substitution requires a redesign. |
| Maximum Core Clock Frequency | 533 MHz | 160 MHz | Core clock determines available MIPS/DMIPS and real-time processing headroom; a large gap affects whether the same signal-processing workload can be handled. |
| On-Chip Program/Data Memory | Large on-chip L1/L2 SRAM (approx. 260 KB total) plus external memory interface | On-chip SRAM (approx. 128 KB total) with external memory interface | On-chip memory capacity affects how much code and data can run without external memory, influencing performance, board space, and BOM cost. |
| Package Type | BGA (CSP_BGA) | LQFP | Different package footprints and pin counts are not drop-in compatible; the PCB land pattern and assembly process must change. |
| Operating Supply Voltage | Multiple rails (core and I/O, approx. 1.2 V core / 2.5–3.3 V I/O) | 3.3 V I/O with lower core voltage | Supply rail requirements dictate power supply design and level-shifting needs; mismatched rails prevent direct board-level replacement. |
| Integrated Ethernet MAC | Yes (10/100 Ethernet MAC integrated) | No integrated Ethernet MAC | Integrated Ethernet changes connectivity options and external component count; a missing MAC requires an external controller for networked designs. |
| Integrated USB Interface | Yes (high-speed USB OTG) | No integrated USB | USB support affects host/device connectivity and peripheral architecture; absence requires external USB controller hardware. |
| Target Application Class | Convergent multimedia/embedded processing with connectivity | Industrial motor control and embedded signal processing | Different intended application domains imply different peripheral sets and validation; substitutability depends on whether the target use case matches the part's design focus. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADSP-21992YBC | ADSP-BF548BBCZ-5A |
|---|---|---|
| Series | ADSP-21xx | Blackfin® |
| Part Status | Obsolete | Active |
| Type | Fixed Point | Fixed Point |
| Interface | SPI, SSP | CAN, SPI, SSP, TWI, UART, USB |
| Clock Rate | 150MHz | 533MHz |
| Non - Volatile Memory | External | External |
| On - Chip RAM | 128kB | 260kB |
| Voltage - I / O | 3.30V | 2.50V, 3.30V |
| Voltage - Core | 2.50V | 1.25V |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | ADSP-2199 | - |
Frequently asked questions
What are the core architectural differences between the ADSP-BF548BBCZ-5A and the ADSP-21992YBC?
The ADSP-BF548BBCZ-5A is a Blackfin fixed-point DSP with a 16-bit/32-bit architecture, operating at 533 MHz, featuring 324 KB on-chip SRAM and integrated peripherals such as Ethernet MAC, USB 2.0, and CAN. The ADSP-21992YBC is a 16-bit fixed-point DSP from the ADSP-2199x family, operating at 160 MHz, with 128 KB on-chip SRAM and a different peripheral set including a PWM unit and ADC interface. They belong to different DSP families and are not pin- or code-compatible.
Are the ADSP-BF548BBCZ-5A and ADSP-21992YBC pin-to-pin compatible?
No. The ADSP-BF548BBCZ-5A is supplied in a 289-ball BGA package, while the ADSP-21992YBC is supplied in a 196-ball BGA package. The ball counts, ball maps, and package dimensions differ, so they cannot be interchanged on the same PCB footprint.
Can firmware developed for the ADSP-21992YBC run on the ADSP-BF548BBCZ-5A without modification?
No. The two devices use different DSP cores and instruction sets. The ADSP-BF548BBCZ-5A uses the Blackfin architecture, while the ADSP-21992YBC uses the ADSP-219x core. Source code would require recompilation with the appropriate toolchain and likely significant porting effort due to differing peripherals, memory maps, and register sets.
How do the maximum operating frequencies and core voltages compare?
The ADSP-BF548BBCZ-5A operates at a core clock of up to 533 MHz with a core voltage of 1.2 V (typical) and 3.3 V I/O. The ADSP-21992YBC operates at up to 160 MHz with a core voltage of 2.5 V (typical) and 3.3 V I/O. The Blackfin device offers substantially higher processing throughput.
What integrated peripherals distinguish the ADSP-BF548BBCZ-5A from the ADSP-21992YBC?
The ADSP-BF548BBCZ-5A integrates a 10/100 Ethernet MAC, USB 2.0 high-speed OTG, CAN 2.0B controller, SD/SDIO, and a parallel peripheral interface (PPI). The ADSP-21992YBC integrates a PWM generation unit, an ADC interface, and a CAN controller, but does not include Ethernet MAC or USB. The peripheral sets target different application classes.
Are these devices suitable for the same application domains?
Not generally. The ADSP-BF548BBCZ-5A is suited to networked embedded applications requiring Ethernet, USB, and higher processing throughput, such as industrial networking and multimedia endpoints. The ADSP-21992YBC is oriented toward motor control and power conversion applications leveraging its PWM and ADC interface. Designers should select based on the required peripheral and performance profile.
Do both devices support external memory expansion?
Yes, both provide external memory interfaces, but with different capabilities. The ADSP-BF548BBCZ-5A includes a flexible external bus interface supporting SDRAM, asynchronous memory, and NAND flash. The ADSP-21992YBC provides an external memory interface for SRAM and flash. The supported memory types, bus widths, and timing parameters differ and must be verified against the respective datasheets.
What package and temperature grade options are documented for these parts?
The ADSP-BF548BBCZ-5A is offered in a 289-ball BGA with an industrial temperature range as specified in the Analog Devices datasheet. The ADSP-21992YBC is offered in a 196-ball BGA, also with an industrial temperature range per its datasheet. Exact grade suffixes and qualified temperature limits should be confirmed from the official manufacturer documentation before design release.