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Texas Instruments BQ4845S-A4NTRG4

Part Number:

BQ4845S-A4NTRG4

Manufacturer:

Texas Instruments

Ventron No:

3004960-BQ4845S-A4NTRG4

Description:

IC RTC CLK/CALENDAR PAR 28-SOIC

ECAD Model:

Datasheet:

BQ4845(Y)

Payment:

Payment

Delivery:

Delivery

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Part Overview

Description
The bq4845 Real-Time Clock is a low-power microprocessor peripheral that integrates a time-of-day clock, a 100-year calendar, and a CPU supervisor in a 28-pin SOIC or DIP. It provides direct connections for a 32.768KHz quartz crystal and a 3V backup battery. Through the use of the conditional chip enable output (CEout) and battery voltage output (Vout) pins, the bq4845 can write-protect and make nonvolatile external SRAMs. The backup cell powers the real-time clock and maintains SRAM information in the absence of system voltage.

Features
Real-Time Clock counts seconds through years in BCD format
On-chip battery-backup switchover circuit with nonvolatile control for external SRAM
Less than 500mA of clock operation current in backup mode
Microprocessor reset valid to Vcc = Vss
Independent watchdog timer with a programmable time-out period
Power-fail interrupt warning
Programmable clock alarm interrupt active in battery-backup mode
Programmable periodic interrupt
Battery-low warning

Applications
Fax machines
Copiers
Industrial control systems
Point-of-sale terminals
Data loggers
Computers

Specifications

Texas Instruments BQ4845S-A4NTRG4 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments BQ4845S-A4NTRG4.

  • Contact Plating
    Gold
  • Mount
    Surface Mount
  • Mounting Type

    Mounting Type refers to the method by which an electronic component is attached to a printed circuit board (PCB) or other surface. Common mounting types include: * Through-hole: Component leads are inserted into holes in the PCB and soldered on the other side. * Surface-mount: Component is placed on the surface of the PCB and soldered in place. * Press-fit: Component is pressed into place on the PCB without soldering. * Socket: Component is inserted into a socket on the PCB, allowing for easy replacement. The mounting type is determined by factors such as the component's size, shape, and power requirements.

    Surface Mount
  • Package / Case

    Package / Case refers to the physical housing or enclosure that encapsulates an electronic component. It provides protection, facilitates handling, and enables electrical connections. The package type determines the component's size, shape, pin configuration, and mounting options. Common package types include DIP (dual in-line package), SOIC (small outline integrated circuit), and BGA (ball grid array). The package also influences the component's thermal and electrical performance.

    28-SOIC (0.295, 7.50mm Width)
  • Number of Pins

    Number of Pins: Indicates the number of electrical connections available on the component. These pins are used to connect the component to other components or circuits on a printed circuit board (PCB). The number of pins determines the functionality and connectivity options of the component. It is important to ensure that the component has the correct number of pins for the intended application.

    28
  • Weight
    730.794007mg
  • Operating Temperature

    Operating Temperature is the range of temperatures at which an electronic component can function properly. It is typically specified in degrees Celsius (°C) and indicates the minimum and maximum temperatures at which the component can operate without experiencing damage or degradation. Operating Temperature is an important parameter to consider when designing electronic circuits, as it ensures that the components will function reliably in the intended operating environment.

    -40°C~85°C
  • Packaging
    Tape & Reel (TR)
  • JESD-609 Code
    e4
  • Feature
    Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
  • Part Status

    Part Status is an electronic component parameter that indicates the availability and production status of a component. It is typically used to inform customers about the availability of a component, whether it is in production, end-of-life, or obsolete. Part Status can also provide information about any restrictions or limitations on the component's use, such as whether it is only available for certain applications or if it has been discontinued.

    Obsolete
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a measure of the susceptibility of a surface mount electronic component to moisture-induced damage during soldering. It is classified into six levels, from 1 (least sensitive) to 6 (most sensitive). MSL is determined by the materials used in the component's construction, including the solderability of its terminals and the presence of moisture-absorbing materials. Components with higher MSL ratings require more stringent handling and storage conditions to prevent moisture absorption and subsequent damage during soldering.

    1 (Unlimited)
  • Number of Terminations
    28
  • ECCN Code
    EAR99
  • HTS Code
    8542.39.00.01
  • Subcategory
    Timer or RTC
  • Technology

    Technology, in the context of electronic components, refers to the specific manufacturing process and materials used to create the component. It encompasses the semiconductor fabrication techniques, such as the type of transistor used (e.g., MOSFET, BJT), the gate oxide thickness, and the interconnect materials. Technology also includes the packaging type, such as surface mount or through-hole, and the leadframe or substrate material. The technology used impacts the component's performance characteristics, such as speed, power consumption, and reliability.

    CMOS
  • Voltage - Supply
    4.75V~5.5V
  • Terminal Position
    DUAL
  • Peak Reflow Temperature (Cel)
    260
  • Supply Voltage

    Supply Voltage is the voltage required to power an electronic component. It is typically measured in volts (V) and is specified in the component's datasheet. The supply voltage must be within the specified range for the component to function properly. If the supply voltage is too low, the component may not function at all. If the supply voltage is too high, the component may be damaged.

    5V
  • Terminal Pitch
    1.27mm
  • Base Part Number
    BQ4845
  • Pin Count
    28
  • Operating Supply Voltage
    5V
  • Power Supplies
    5V
  • Interface

    In electronics, an interface refers to the connection point or boundary between two or more electronic systems or devices. It defines the physical, electrical, and logical characteristics that enable communication and data exchange between them. An interface specifies the protocols, pinouts, voltage levels, data formats, and other parameters necessary for the systems to interact seamlessly. It ensures compatibility and interoperability between different components or devices, allowing them to exchange information and perform their intended functions.

    Parallel
  • Clock Frequency

    Clock Frequency, measured in Hertz (Hz), is the rate at which an electronic component, such as a microprocessor or oscillator, generates electrical pulses. It determines the speed at which the component can process data and execute instructions. A higher clock frequency generally indicates faster performance, but also higher power consumption and heat generation. Clock Frequency is a crucial parameter for timing-sensitive applications, such as digital signal processing and real-time systems.

    0.032MHz
  • Logic Function
    Clock
  • External Data Bus Width
    8
  • Number of Timers
    1
  • Time Format

    Time Format is an electronic component parameter that specifies the format of the time data that is output by the component. The most common time formats are 24-hour format and 12-hour format. 24-hour format displays the time in hours and minutes, with the hours ranging from 00 to 23. 12-hour format displays the time in hours, minutes, and seconds, with the hours ranging from 01 to 12 and an AM or PM designation.

    HH:MM:SS (12/24 hr)
  • Date Format

    Date Format is an electronic component parameter that specifies the format in which the date is displayed on the component. This parameter is typically used for components that have a built-in clock or calendar, such as digital watches, clocks, and computers. The Date Format parameter can be set to a variety of different formats, such as MM/DD/YY, DD/MM/YY, and YYYY/MM/DD.

    YY-MM-DD-dd
  • Current - Timekeeping (Max)
    1.5mA Typ @ 4.5 V~5.5 V
  • Time-Min
    SECONDS
  • Interrupt Capability
    Y
  • Voltage - Supply, Battery
    2.3V~4V
  • Volatile
    NO
  • Height Seated (Max)
    2.667mm
  • Length

    Length, in the context of electronic components, refers to the physical dimension of a component along its longest axis. It is typically measured in millimeters (mm) or inches (in). Length is a crucial parameter for determining the physical size and space requirements of a component on a printed circuit board (PCB) or other assembly. It also affects the component's electrical characteristics, such as inductance and capacitance, which can be influenced by the length of conductors or traces within the component.

    17.9705mm
  • Width
    7.5565mm
  • Radiation Hardening
    No
  • RoHS Status
    ROHS3 Compliant
  • Lead Free
    Lead Free

Certification

  • ISO 9001
  • ISO 13485
  • ISO 45001
  • ASA
  • ESD
  • DUNS
  • SMTA
  • ROHS

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