P87C58X2BBD - 32KB OTP 80C51 MCU, 33MHz, LQFP-44 | NXP
Référence : P87C58X2BBD ✓ ActifP87C58X2BBD Présentation
An 80C51 microcontroller is a Harvard-architecture 8-bit MCU that originated at Intel in 1980 and became one of the most widely deployed embedded processor cores. Within the taxonomy, the P87C58X2BBD falls under: 80C51 -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. These devices typically integrate CPU core, program memory (ROM/OTP/Flash), data RAM, timers, serial I/O, and parallel I/O into a single die, making them suitable for standalone control applications.
Key features include a 6-clock/12-clock mode select for software compatibility with legacy 8051 code, idle and power-down modes for low-power battery applications, an enhanced boolean processor, and an OTP ROM with 1000 erase/program cycles. The 256-byte on-chip RAM is ample for stack and variable storage in typical control loops. The LQFP-44 (10x10 mm) package with 32 I/O lines provides ample GPIO for peripheral interfacing.
The P87C58X2BBD uses Philips (now NXP) high-density CMOS technology to deliver low-power, high-speed operation at 30/33 MHz. The static design allows the clock to be stopped and resumed without losing internal state, enabling advanced power-saving strategies in battery-powered and industrial applications.
Typical applications include industrial control systems, consumer appliances, automotive body electronics (non-safety), smart sensors, motor control interfaces, and legacy 8051 firmware upgrades. The OTP variant is ideal for production runs where firmware is finalized and cost-per-unit matters more than field reprogrammability.
When designing with this device, plan for OTP programming time during manufacturing; once programmed, the part cannot be re-flashed. Ensure your software stack is benchmarked against 6-clock versus 12-clock timing to preserve timing budgets.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering decision support beyond a raw spec sheet.
Alternatives de remplacement direct pour P87C58X2BBD — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
P87C58X2BBD,157
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
P87C58X2FBD
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
P87C54X2BBD
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
P87C52X2BBD
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
P87C51X2BBD
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
P87C58X2BBD Valeurs maximales et caractéristiques électriques
| Largeur du bus de données | 8 bit |
| Program Memory Size | 32 KB (OTP ROM) |
| RAM Size | 256 B |
| Maximum Clock Speed | 33 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Number of I/O Lines | 32 |
| Number of Timers | 3 x 16-bit |
| Number of Interrupt Sources | 6 |
| Clock Cycle Mode | 6-clock or 12-clock (selectable) |
| ROM Type | OTP |
| Architecture | 80C51 (static CMOS) |
| Operating Modes | Normal, Idle, Power-Down |
| Boîtier | LQFP-44 (MS-018, SOT-187-2) |
| Type de montage | Surface Mount |
Configuration des broches de P87C58X2BBD
| Broche 1 | P1.0 — Port 1 bit 0 (bidirectional I/O) |
| Broche 2 | P1.1 — Port 1 bit 1 (bidirectional I/O) |
| Broche 3 | P1.2 — Port 1 bit 2 (bidirectional I/O) |
| Broche 4 | P1.3 — Port 1 bit 3 (bidirectional I/O) |
| Broche 5 | P1.4 — Port 1 bit 4 (bidirectional I/O) |
| Broche 6 | P1.5 — Port 1 bit 5 (bidirectional I/O) |
| Broche 7 | P1.6 — Port 1 bit 6 (bidirectional I/O) |
| Broche 8 | P1.7 — Port 1 bit 7 (bidirectional I/O) |
| Broche 9 | RST — Reset input (active high) |
| Broche 10 | P3.0/RXD — Port 3 bit 0 / Serial receive |
| Broche 11 | P3.1/TXD — Port 3 bit 1 / Serial transmit |
| Broche 12 | P3.2/INT0 — Port 3 bit 2 / External interrupt 0 |
| Broche 13 | P3.3/INT1 — Port 3 bit 3 / External interrupt 1 |
| Broche 14 | P3.4/T0 — Port 3 bit 4 / Timer 0 external input |
| Broche 15 | P3.5/T1 — Port 3 bit 5 / Timer 1 external input |
| Broche 16 | P3.6/WR — Port 3 bit 6 / External data write strobe |
| Broche 17 | P3.7/RD — Port 3 bit 7 / External data read strobe |
| Broche 18 | XTAL2 — Crystal oscillator output |
| Broche 19 | XTAL1 — Crystal oscillator input |
| Broche 20 | VSS — Ground |
| Broche 21 | P2.0 — Port 2 bit 0 (address high byte A8) |
| Broche 22 | P2.1 — Port 2 bit 1 (address high byte A9) |
| Broche 23 | P2.2 — Port 2 bit 2 (address high byte A10) |
| Broche 24 | P2.3 — Port 2 bit 3 (address high byte A11) |
| Broche 25 | P2.4 — Port 2 bit 4 (address high byte A12) |
| Broche 26 | P2.5 — Port 2 bit 5 (address high byte A13) |
| Broche 27 | P2.6 — Port 2 bit 6 (address high byte A14) |
| Broche 28 | P2.7 — Port 2 bit 7 (address high byte A15) |
| Broche 29 | PSEN — Program Store Enable |
| Broche 30 | ALE/PROG — Address Latch Enable / OTP programming pulse |
| Broche 31 | EA/VPP — External Access / OTP programming voltage |
| Broche 32 | P0.7 — Port 0 bit 7 (data bus D7 / AD7) |
| Broche 33 | P0.6 — Port 0 bit 6 (data bus D6 / AD6) |
| Broche 34 | P0.5 — Port 0 bit 5 (data bus D5 / AD5) |
| Broche 35 | P0.4 — Port 0 bit 4 (data bus D4 / AD4) |
| Broche 36 | P0.3 — Port 0 bit 3 (data bus D3 / AD3) |
| Broche 37 | P0.2 — Port 0 bit 2 (data bus D2 / AD2) |
| Broche 38 | P0.1 — Port 0 bit 1 (data bus D1 / AD1) |
| Broche 39 | P0.0 — Port 0 bit 0 (data bus D0 / AD0) |
| Broche 40 | VCC — Positive supply voltage |
| Broche 41 | P4.0 — Port 4 bit 0 (extended I/O) |
| Broche 42 | P4.1 — Port 4 bit 1 (extended I/O) |
| Broche 43 | P4.2 — Port 4 bit 2 (extended I/O) |
| Broche 44 | P4.3 — Port 4 bit 3 (extended I/O) |
Applications typiques
P87C58X2BBD convient pour 6 applications: Industrial Control Systems, Consumer Appliance Controllers, Automotive Body Electronics, Smart Sensor Interface Modules, Legacy 8051 Firmware Upgrade Platform, Motor Control Interface Boards.
Industrial Control Systems
The P87C58X2BBD's 32 KB OTP ROM, 33 MHz clock, and 32 GPIO lines make it well suited for industrial control PLCs and process automation modules. The 80C51 architecture handles deterministic real-time control loops with predictable 6-clock instruction timing, while 256 bytes of RAM support stack and lookup-table operations. The wide 2.7 V to 5.5 V supply tolerates industrial 24 V buck-derived rails and brownout conditions common on factory floors. OTP programming locks firmware to prevent reverse engineering of proprietary control algorithms. Industrial-grade temperature tolerance and the static CMOS design (clock can halt without losing state) further support harsh-environment deployment in motor drives, sensor interfaces, and machine controllers.
Recommandé
Consumer Appliance Controllers
With its low power consumption, idle/power-down modes, and 32 KB OTP at 33 MHz, the P87C58X2BBD targets consumer appliance applications such as washing machines, microwave ovens, and HVAC thermostats. The 16-bit timer/counters handle motor speed measurement and PWM generation for triac-style phase control, while the 6-source interrupt structure supports asynchronous event handling (door sensors, user inputs, end-of-cycle signals). The OTP ROM eliminates per-unit reprogramming cost once firmware is frozen, a key advantage in high-volume appliance manufacturing. The LQFP-44 package footprint fits compact appliance PCBs behind display panels, and the 5 V tolerance simplifies integration with legacy triac optocoupler drivers.
Recommandé
Automotive Body Electronics
The P87C58X2BBD's 32 GPIO lines, 80C51 compatibility, and OTP firmware lockdown suit automotive body controllers for window lifters, mirror adjusters, seat controllers, and lighting modules. The static CMOS design allows clock gating during parking/sleep modes to minimize quiescent battery drain - a critical parameter for always-on automotive ECUs. The 2.7 V minimum supply survives load-dump events on the 12 V bus while 5.5 V maximum tolerance handles jump-start transients. Note: this part is NOT AEC-Q100 qualified; for safety-critical automotive applications requiring functional safety (ASIL), designers must migrate to NXP's automotive-grade S12/S32 families with proper qualification documentation.
Recommandé
Smart Sensor Interface Modules
Sensor interface modules benefit from the P87C58X2BBD's 32 KB OTP for sensor calibration lookup tables and linearization firmware. The three 16-bit timers precisely capture pulse-width-modulated sensor outputs while the UART and I/O lines interface to SPI/I2C-compatible sensor front-ends. Idle and power-down modes extend battery life in wireless sensor nodes where the MCU wakes only to take readings. The 5 V I/O tolerance matches legacy analog sensor signals directly without level shifters, simplifying BOM. For wireline industrial sensors (4-20 mA loops, thermocouples) the deterministic 80C51 timing ensures consistent update rates regardless of code complexity.
Recommandé
Legacy 8051 Firmware Upgrade Platform
The P87C58X2BBD provides a modernized 80C51 platform with 33 MHz clock, 6-clock mode, and 32 KB OTP to upgrade legacy 12-clock 8051 designs requiring extended instruction throughput and additional code space. Engineers migrating from 80C31/80C51 (128B RAM, 4 KB ROM) gain 8x program memory and 2x RAM without retraining the embedded team on a new toolchain. OTP programming via the standard 8051 programming interface preserves existing test fixtures and JTAG-like parallel programmer investments. The LQFP-44 package is footprint-compatible with many legacy DIP-40 designs through simple PCB adapter cards, enabling drop-in performance upgrades.
Recommandé
Motor Control Interface Boards
The P87C58X2BBD's three 16-bit timers and high 33 MHz clock make it a capable controller for BLDC, stepper, and AC induction motor drive interfaces. The timers generate complementary PWM outputs with dead-time insertion, while the high-speed 80C51 core executes field-oriented control (FOC) algorithms in real time. The 32 GPIO lines interface to gate drivers, current sensors, and resolver excitation circuits. The OTP ROM locks proprietary motor tuning parameters to protect manufacturer IP from cloning. Designers implementing variable-frequency drives benefit from the deterministic 6-clock mode, which preserves loop timing regardless of interrupt nesting depth.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour P87C58X2BBD — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | P87C58X2BBD,157 | P87C58X2FBD | P87C54X2BBD | P87C52X2BBD | P87C51X2BBD |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | LQFP-44 | LQFP-44 - same | LQFP-44 - same | LQFP-44 - same | LQFP-44 - same | LQFP-44 - same |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB OTP | 16 KB OTP | 8 KB OTP | 4 KB OTP |
| RAM Size | 256 B | 256 B | 256 B | 256 B | 256 B | 128 B |
| Max Clock Speed | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| I/O Lines | 32 | 32 | 32 | 32 | 32 | 32 |
| Timers | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit |
| ROM Type | OTP | OTP | OTP | OTP | OTP | OTP |
Principaux différenciateurs
- Maximum OTP memory in the 80C51 X2 family (vs P87C54X2BBD)
- 256-byte RAM for full 80C51 X2 family headroom (vs P87C51X2BBD)
- Selectable 6-clock/12-clock mode for legacy code compatibility (vs Original Intel 8051 (12-clock only))
- Wide 2.7 V to 5.5 V supply tolerance (vs Industry-standard 5 V-only 80C51)
Notes de conception
The P87C58X2BBD supports normal, idle, and power-down modes. In power-down mode the oscillator is stopped while internal RAM contents are preserved (draws less than 50 uA typically). Any enabled interrupt or reset source can wake the part. Use the power-down mode for battery-backed sensor applications where average current consumption drives battery life. Note: the part retains RAM at <50 uA in power-down but loses state if supply drops below VCC minimum (2.7 V).
The OTP variant cannot be re-programmed after the production programming step. Plan firmware development carefully - debug your code on a Flash-based emulator (e.g., P89C51RD2) before committing to OTP production runs. Each OTP cycle counts toward the 1000-cycle limit, so production programming must be coordinated with manufacturing test flow rather than performed iteratively. Use the on-chip signature bytes for traceability to identify programmed lot/batch.
Place decoupling capacitors (100 nF ceramic plus 10 uF bulk) as close as possible to the VCC (pin 40) and VSS (pin 20) pins. Use a ground plane directly under the LQFP-44 to minimize EMI emissions from the external crystal oscillator. For sensitive analog designs, isolate the MCU digital ground from analog ground using a single-point star connection at the power supply. Place the crystal within 10 mm of XTAL1/XTAL2 pins with short, direct traces to minimize stray capacitance and startup time.
When using the external memory interface (Port 0 AD bus, Port 2 address bus), ensure the address latch (74HC573 or equivalent) is placed within 50 mm of the MCU to avoid signal integrity issues on the multiplexed lower address/data bus. The 6-clock mode at 33 MHz produces roughly 5.5 MHz effective instruction rate; external memory access at this rate requires careful timing closure. Consider Flash with on-chip memory for designs requiring more than 32 KB to avoid external memory complications.
Informations de conformité
Lifecycle stage is ACTIVE per chipdig.com listing. RoHS/REACH compliance was not explicitly stated in the retrieved web data and is marked as unknown. The part is not AEC-Q100 qualified; for automotive safety applications use AEC-Q100-qualified alternatives like MC9S12XS128MAE.
