BQ4852YMC-85 RTC with 512Kx8 NVSRAM | Texas Instruments
Артикул: BQ4852YMC-85 ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
BQ4852YMC-85 Обзор
A real-time clock (RTC) is a clock-and-timing IC that maintains calendar and time information while the main system is unpowered. A nonvolatile SRAM (NVSRAM) retains stored data across power loss, combining the persistence of memory with the timing functions of an RTC. Together, these devices provide backup storage, event timestamps, configuration retention, and elapsed-time measurement in industrial-control, instrumentation, data-acquisition, and embedded systems.
The verified data identifies 512 Kbit organized as 512 Kbyte by 8 bits, real-time clock operation from seconds through years, RAM-like clock access, unlimited writes, and integrated SRAM, crystal, power-fail control, and battery functions. The BQ4852YMC-85 also includes watchdog-timer functionality according to the Mouser product description. Its 36-DIP module format supports through-hole assembly rather than a compact surface-mount design, making it especially relevant to legacy and industrial equipment with DIP-compatible footprints.
The parallel interface permits direct connection between the RTC/NVSRAM and a host bus without the serial addressing required by I2C devices. The SRAM-like access method can simplify firmware when memory-mapped access is preferred. The power-fail control and backup-battery function help preserve data and maintain timekeeping during supply interruptions, although exact capacitor, battery, retention, and endurance values require confirmation in the manufacturer datasheet.
Typical uses include industrial data loggers, test equipment, programmable controllers, meters, embedded instruments, and systems that require persistent configuration records alongside real-time timestamps. The package is not SOA data: it is a clock-and-timing and memory IC, not a discrete power semiconductor. The 16-page datasheet result supplied by the verified sources should be consulted for the complete pinout, electrical limits, battery configuration, oscillator characteristics, and power-fail behavior before design release.
For a new design, verify the exact package dimensions, pin names, voltage levels, bus timing, and backup-power architecture against the manufacturer datasheet. For a replacement, do not rely on generic RTC or SRAM substitutes: the target requires a 36-DIP module, parallel access, 512 Kbyte by 8 organization, and compatible power-fail behavior. This page combines verified distributor metadata, structured product facts, and explicit data gaps rather than estimating unavailable electrical values.
Аналоги без доработки для BQ4852YMC-85 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
BQ4850YMC-85
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
BQ4852YMC-85 Характеристики
| Product Type | Real-time clock and NVSRAM module |
| Device Function | RTC clock/calendar with battery-backed nonvolatile SRAM |
| Nominal SRAM Capacity | 512 Kbit |
| Memory Organization | 512 Kbyte x 8 bits |
| Clock Format | BCD calendar/time format |
| Calendar Range | Seconds through years |
| Host Interface | Parallel RAM-like access |
| Корпус | 36-DIP module |
| Package Width | 0.610 inch |
| Package Length | 15.49 mm |
| Integrated Functions | SRAM, RTC, crystal, power-fail control, and battery |
| Write Endurance | Unlimited writes |
| Watchdog Timer | Present |
| SRAM Compatibility | Pin-compatible with industry-standard x8 SRAMs |
| Technology | MOS |
| Статус RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Руководство по цоколевке BQ4852YMC-85 в корпусе 15.49 mm
Цоколевка для BQ4852YMC-85 (корпус 15.49 mm). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для BQ4852YMC-85.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
BQ4852YMC-85 подходит для 6 применениеs: Industrial Data Loggers, Programmable Test Equipment, Embedded Instrumentation, Configurable Controllers, Metering and Energy Monitors, Legacy Through-Hole Control Boards.
Industrial Data Loggers
The BQ4852YMC-85 fits industrial data loggers that need local event timestamps and retained records during a power interruption. Its verified 512 Kbyte x 8 NVSRAM provides RAM-like parallel storage, while the integrated real-time clock counts from seconds through years in BCD format. A controller can write logged events, configuration values, or counters without adding a separate SRAM. The 36-DIP format suits through-hole industrial electronics, but the design must follow the exact manufacturer pinout and provide the required backup-power components. Main supply interruption behavior, battery life, retention duration, and write timing are [DATA_NEEDED] and must be verified before production release.
Рекомендуется
Programmable Test Equipment
The BQ4852YMC-85 is useful in programmable test equipment where calibration constants, test sequences, and event logs must survive a power interruption. Its verified parallel RAM-like access and 512 Kbyte x 8 NVSRAM capacity make it a practical companion to a controller that already uses a memory-mapped bus. The clock provides timestamps for measurements and batches, while the watchdog function can help recover a stalled controller if its timing behavior matches the system requirements. Because the module uses a 36-DIP package, it favors established through-hole instrument architectures. Exact electrical limits, retention time, battery requirements, and watchdog timing must be confirmed from the manufacturer datasheet.
Рекомендуется
Embedded Instrumentation
The BQ4852YMC-85 supports embedded instruments that combine measurement history with calendar-based records. The verified 512 Kbit memory can hold operational counters, calibration records, or event buffers, while the integrated RTC supplies seconds-through-years timekeeping. RAM-like access helps firmware treat persistent storage as a memory-mapped resource instead of adding a serial protocol. A through-hole instrument platform can use the 36-DIP footprint, but board designers must preserve the correct package orientation and pin numbering. The verified sources do not specify supply voltage, data retention, oscillator accuracy, or battery chemistry, so those parameters require direct datasheet verification before implementation.
Рекомендуется
Configurable Controllers
The BQ4852YMC-85 fits configurable industrial and building controllers that must preserve setpoints and operating history after a brownout or power interruption. The verified integrated power-fail control and battery functions distinguish it from an ordinary volatile SRAM, while the real-time clock supports scheduled events and operating-hour logs. Its parallel interface can be connected to a controller bus when the existing system architecture already supports memory-mapped access. The 36-DIP module is appropriate for replacement of a legacy through-hole design, provided the exact pinout and electrical interface match. Main-supply range, backup-source requirements, write endurance, and retention are [DATA_NEEDED].
Рекомендуется
Metering and Energy Monitors
The BQ4852YMC-85 can support metering systems that need tamper-resistant local records, event timestamps, and retained configuration. Its 512 Kbyte x 8 NVSRAM stores cumulative counters or interval records while the RTC supplies date and time references. RAM-like access can simplify integration into a parallel-bus meter controller, and the watchdog function may provide system supervision if the manufacturer's timing and reset requirements are satisfied. The 36-DIP package is well matched to older through-hole meter platforms but is not a compact surface-mount choice. Calibration accuracy, data-retention duration, battery backup limits, and power-fail thresholds must be obtained from the official datasheet.
Рекомендуется
Legacy Through-Hole Control Boards
The BQ4852YMC-85 is suited to legacy through-hole control boards that require a direct 36-DIP footprint and parallel memory-style access. The verified package dimensions of 0.610 inch width and 15.49 mm length help identify the mechanical format, while the x8 SRAM-compatible pin concept can simplify replacement planning. Such systems can use the NVSRAM for retained configuration and the RTC for timestamps or elapsed-time measurements without adding two separate packaged devices. Do not assume that any 36-DIP RTC is compatible: confirm pin names, signal directions, voltage levels, memory size, battery architecture, and watchdog behavior. The full pinout and electrical limits are [DATA_NEEDED].
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для BQ4852YMC-85 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Ключевые отличия
- Integrated RTC and persistent memory (против X1227S8-2.7A)
- Through-hole legacy footprint (против X1227S8-2.7A)
- Power-fail and backup functionality (против Generic RTC-only replacement)
Заметки по проектированию
Design the backup-power path from the manufacturer requirements rather than assuming a generic capacitor or battery connection. The verified description confirms integrated battery and power-fail functions, but the supply voltage, switchover behavior, capacitor value, and retention time are [DATA_NEEDED]. Validate startup current, battery reversal protection, and main-supply dropout behavior across the complete temperature range before schematic release.
Preserve the 36-DIP footprint and the device's exact orientation. The verified listing gives a 0.610 inch width and 15.49 mm length, but it does not provide the complete pin map. Confirm every pin against the official datasheet, especially power, ground, crystal, write-control, alarm, and memory-bus signals. Check hole diameter, row spacing, component height, and battery clearance rather than relying on a generic DIP footprint.
Keep the RTC and NVSRAM address, data, and control traces away from noisy switching nodes and high-current power paths. The device supports RAM-like parallel access, so signal timing and routing can affect system reliability even though the verified data does not specify bus timing. Use a defined ground reference, minimize loop area, and validate read/write timing with the host processor and any expansion logic.
Do not substitute a generic RTC or a serial-interface memory for BQ4852YMC-85. The target combines a parallel 36-DIP interface, 512 Kbyte x 8 NVSRAM, crystal control, backup power, and power-fail handling. X1227S8-2.7A, identified in the supplied comparison data, is an I2C 8-SOIC device and is not drop-in compatible. Confirm memory organization, bus direction, battery architecture, and watchdog behavior before approving any replacement.
Информация о соответствии
The verified web results do not provide current RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification declarations for BQ4852YMC-85. Obtain current Texas Instruments documentation before making a compliance claim.
