BQ4832YMA-85 - RTC with 32Kx8 NVSRAM | Texas Instruments
N.º de pieza: BQ4832YMA-85 ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $41.739 | $41,74 |
| 10 | $41.739 | $417,39 |
| 100 | $41.739 | $4.173,90 |
| 500 | $41.739 | $20.869,50 |
| 1.000 | $41.739 | $41.739,00 |
BQ4832YMA-85 Descripción general
A real-time clock is a clock-and-timing integrated circuit that maintains calendar and time information independently of the host processor. An RTC module extends the clock-and-timing category by combining timekeeping with nonvolatile memory, supervision, alarm, and power-management functions. In the broader semiconductor hierarchy, the BQ4832YMA-85 belongs to integrated circuits, clock and timing ICs, and real-time-clock modules.
Verified features include a 32Kx8 NVSRAM, a watchdog timer, integrated SRAM, a real-time clock, a CPU supervisor, a crystal, a power-fail circuit, and battery-low warning. The device counts hundredths of seconds through years in BCD format, while RAM-like clock access supports system software access to the time and calendar functions. Distributor data identifies the component as a parallel, rectangular, through-hole commercial-temperature device with 32 terminals.
The BQ4832YMA-85 is intended for embedded industrial, instrumentation, communications, data-acquisition, and embedded-control systems where a host reset, power interruption, or system clock disturbance must not erase chronological records. Its integrated NVSRAM allows application data to be associated with timekeeping, while the watchdog and supervisor functions support more robust control-loop behavior. The 32-pin DIP package favors through-hole construction and prototype or legacy-system compatibility.
Designers should verify the complete pinout, oscillator connection, backup-battery requirements, interrupt polarity, memory organization, and electrical limits against the manufacturer datasheet before layout. Because the verified source data does not provide complete timing, current, temperature, and pin-level specifications, those values require design verification rather than assumption.
This page combines verified distributor data, the available datasheet description, application guidance, and engineering-focused procurement context. It is intended to support initial component selection while clearly separating confirmed values from parameters that still require manufacturer-documentation review.
Alternativas directas para BQ4832YMA-85 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
BQ4832YMA-70
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
BQ4832Y-85
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
BQ4832Y
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
M48T35Y-70MH1F
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
BQ4832YMA-85
✅ Sustitución directa✓ En stock
$41.739 / unidad
Ver hoja de datos →BQ4832YMA-85 Especificaciones
| Product Type | Real-time clock module with 32Kx8 NVSRAM |
| Manufacturer | Texas Instruments |
| Nominal Supply Voltage | 5 V |
| Clock Frequency | 0.032 MHz |
| NVSRAM Capacity | 32Kx8 bits |
| Integrated Memory | 32Kx8 NVSRAM |
| Timekeeping Format | BCD, hundredths of seconds through years |
| Interfaz | Parallel |
| Interrupt Capability | Yes |
| Watchdog Timer | Integrated |
| CPU Supervisor | Integrated |
| Crystal | Integrated |
| Power-Fail Circuit | Integrated |
| Battery-Low Warning | Integrated |
| Encapsulado | 32-DIP module |
| Package Length | 0.610 inch (15.49 mm) |
| Terminal Count | 32 terminals |
| Tipo de montaje | Through-hole |
| Temperature Grade | Commercial |
| Package Shape | Rectangular |
| Manufacturer Description | RTC module with 32Kx8 NVSRAM, watchdog timer, interrupts, and battery-low warning |
Guía de configuración de pines de BQ4832YMA-85 rectangular
Configuración de pines para BQ4832YMA-85 (encapsulado rectangular). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para BQ4832YMA-85.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
BQ4832YMA-85 es adecuado para 6 aplicacións: Industrial Data Loggers, Instrumentation and Measurement Equipment, Legacy Communications Controllers, Battery-Backed Embedded Control, Test and Measurement Systems, Power-Fail-Aware Data Preservation.
Industrial Data Loggers
The BQ4832YMA-85 fits industrial data loggers that need calendar timestamps and retained event records between power interruptions. Its 32Kx8 NVSRAM provides a small nonvolatile storage area, while the RTC counts time in BCD format from hundredths of seconds through years. The parallel interface and 32-DIP package suit legacy controller boards that are easier to service with through-hole components. The integrated power-fail circuit and battery-low warning support system-level energy monitoring, but battery chemistry, retention time, current consumption, and exact interrupt behavior must be confirmed from the manufacturer datasheet before deployment.
Recomendado
Instrumentation and Measurement Equipment
The BQ4832YMA-85 is appropriate for instrumentation requiring traceable event timing and supervisory control. The integrated RTC supplies a host-independent calendar reference, and the 32Kx8 NVSRAM can retain configuration or measurement metadata when the main supply falls. The watchdog and CPU supervisor functions add protection for processor-controlled instruments, while the power-fail and battery-low circuits can inform the host of backup-power status. For laboratory or field equipment, designers should verify oscillator accuracy, calibration requirements, operating-temperature limits, and memory-retention behavior because those values are not included in the supplied search data.
Recomendado
Legacy Communications Controllers
The BQ4832YMA-85 can support legacy communications equipment that needs dependable time stamps, alarms, and retained control data. Its parallel 32-DIP interface is compatible with the through-hole architecture identified in the verified data, allowing integration into older controller boards without immediately converting the design to a surface-mount package. The watchdog and CPU supervisor functions are useful when a communications controller must recover from firmware or processor stalls. Exact protocol mapping, interrupt polarity, and timing margins must be taken from the manufacturer pinout and electrical tables rather than inferred from the distributor description.
Recomendado
Battery-Backed Embedded Control
The BQ4832YMA-85 is relevant to embedded controllers that must preserve operating history during brief power loss or reset. Its NVSRAM offers nonvolatile storage for status flags and event records, while the RTC maintains calendar continuity and the power-fail circuit can identify an impending supply transition. The battery-low warning supports maintenance diagnostics. The device should not be selected for a backup-power design without confirming the external battery interface, current consumption, data-retention duration, and whether the integrated crystal is intended for the required accuracy and temperature range.
Recomendado
Test and Measurement Systems
The BQ4832YMA-85 can add independent event timing to test systems, embedded analyzers, and service equipment. A real-time clock allows records to be associated with dates and times, while the NVSRAM can hold small amounts of state that should survive a controller restart. The watchdog and CPU supervisor features are valuable when the instrument must detect an unresponsive embedded processor. Because the verified results do not specify clock accuracy, temperature coefficient, or endurance, precision timing applications should use the manufacturer datasheet to establish whether the module meets the measurement requirement.
Recomendado
Power-Fail-Aware Data Preservation
The BQ4832YMA-85 is suitable for systems that need to distinguish an orderly shutdown from an unexpected supply interruption. The integrated power-fail circuit can support a controlled response, while the NVSRAM preserves selected records and the RTC maintains event chronology. A watchdog can complement the power-fail response by detecting a processor that has stopped servicing the module. Firmware and hardware design must coordinate the power rails carefully so the module receives the required backup supply and the host has enough time to respond; those electrical details are not supplied in the verified snippets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para BQ4832YMA-85 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | BQ4832YMA-70 | BQ4832Y-85 | BQ4832Y | M48T35Y-70MH1F | BQ4832YMA-85 |
|---|---|---|---|---|---|---|
| Package | 32-DIP module | 32-DIP module | 32-DIP module | 32-DIP module | 32-DIP module | 32-DIP module |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | Texas Instruments |
| Product Function | RTC module with 32Kx8 NVSRAM | Related RTC module | Related RTC module | Related RTC module | Timekeeping-module comparison candidate | RTC module with 32Kx8 NVSRAM |
Diferenciadores clave
- Integrated RTC, NVSRAM, watchdog, and supervisory functions (frente a M48T35Y-70MH1F)
- Verified 5 V nominal supply (frente a BQ4832YMA-70)
- Parallel 32-DIP module format (frente a M48T35Y-70MH1F)
- Verified 0.032 MHz clock specification (frente a BQ4832Y)
Notas de diseño
Design the supply rails around the confirmed 5 V nominal operating condition and preserve the module’s backup-power behavior during source transitions. The verified data confirms an integrated power-fail circuit and battery-low warning, but it does not provide the external battery voltage, current consumption, or power-fail timing. Verify those values in the manufacturer datasheet and size the backup source so the RTC and NVSRAM remain valid for the required outage duration.
Use a 32-pin through-hole footprint and route the parallel bus, power, ground, control, and interrupt nets according to the exact manufacturer pinout. The supplied sources identify the package as a 32-DIP module but do not expose all pin numbers or functions, so do not derive the schematic from the package name alone. Confirm pin 1 orientation, supply pins, ground pins, oscillator connections, address/data signals, and interrupt polarity before release.
Do not treat every BQ4832Y ordering suffix or the M48T35Y-70MH1F comparison candidate as automatically interchangeable. The verified cross-reference results do not establish identical pinout, supply limits, RTC accuracy, memory organization, watchdog behavior, or interrupt mapping. For any replacement, compare the manufacturer ordering table and conduct a full electrical and firmware review. The supplied data does not provide complete operating-temperature, current, retention, or accuracy values.
Información de cumplimiento
The supplied distributor and marketplace results do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than assumed.
