DS12885Q
Real Time Clock, Volatile, 1 Timer(s), CMOS, PQCC28, PLASTIC, LCC-28DS12885Q
Real Time Clock, Volatile, 1 Timer(s), CMOS, PQCC28, PLASTIC, LCC-28
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服務與包裝
服務與包裝
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例子
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剪膠帶
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DS12885Q 數據表
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目前的價格方案正在編制中。請聯絡我們的客戶服務團隊獲取最新的價格資訊。感謝您的理解和支援!
詳細說明
General DescriptionThe DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery backed static RAM (113 bytes in the DS12C887 and DS12C887A). The DS12887 integrates a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package.Features♦ Drop-In Replacement for IBM AT Computer Clock/Calendar♦ RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099♦ Binary or BCD Time Representation♦ 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode♦ Daylight Saving Time Option♦ Selectable Intel or Motorola Bus Timing♦ Interfaced with Software as 128 RAM Locations♦ 14 Bytes of Clock and Control Registers♦ 114 Bytes of General-Purpose, Battery-Backed RAM (113 Bytes in the DS12C887 and DS12C887A)♦ RAM Clear Function (DS12885, DS12887A, and DS12C887A)♦ Interrupt Output with Three Independently Maskable Interrupt Flags♦ Time-of-Day Alarm Once Per Second to Once Per Day♦ Periodic Rates from 122μs to 500ms♦ End-of-Clock Update Cycle Flag♦ Programmable Square-Wave Output♦ Automatic Power-Fail Detect and Switch Circuitry♦ Optional 28-Pin PLCC Surface Mount Package or 32-Pin TQFP (DS12885)♦ Optional Encapsulated DIP (EDIP) Package with Integrated Crystal and Battery (DS12887, DS12887A, DS12C887, DS12C887A)♦ Optional Industrial Temperature Range Available♦ Underwriters Laboratory (UL) Recognized
主要特徵
- ♦ Drop-In Replacement for IBM AT Computer Clock/Calendar
- ♦ RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099
- ♦ Binary or BCD Time Representation
- ♦ 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode
- ♦ Daylight Saving Time Option
- ♦ Selectable Intel or Motorola Bus Timing
- ♦ Interfaced with Software as 128 RAM Locations
- ♦ 14 Bytes of Clock and Control Registers
- ♦ 114 Bytes of General-Purpose, Battery-Backed RAM (113 Bytes in the DS12C887 and DS12C887A)
- ♦ RAM Clear Function (DS12885, DS12887A, and DS12C887A)
- ♦ Interrupt Output with Three Independently Maskable Interrupt Flags
- ♦ Time-of-Day Alarm Once Per Second to Once Per Day
- ♦ Periodic Rates from 122μs to 500ms
- ♦ End-of-Clock Update Cycle Flag
- ♦ Programmable Square-Wave Output
- ♦ Automatic Power-Fail Detect and Switch Circuitry
- ♦ Optional 28-Pin PLCC Surface Mount Package or 32-Pin TQFP (DS12885)
- ♦ Optional Encapsulated DIP (EDIP) Package with Integrated Crystal and Battery (DS12887, DS12887A, DS12C887, DS12C887A)
- ♦ Optional Industrial Temperature Range Available
- ♦ Underwriters Laboratory (UL) Recognized
規格
以下是所選零件的基本參數,涉及零件的特性及其所屬類別。
Pbfree Code | No | Rohs Code | No |
Part Life Cycle Code | Obsolete | Part Package Code | QLCC |
Pin Count ! | 28 | Reach Compliance Code | not_compliant |
ECCN Code | EAR99 | HTS Code ! | 8542.39.00.01 |
Additional Feature ! | DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING | Clock Frequency-Max | 0.032 MHz |
External Data Bus Width | 8 | Information Access Method | PARALLEL, MUXED BUS |
Interrupt Capability ! | Y | JESD-30 Code | S-PQCC-J28 |
JESD-609 Code | e0 | Length | 11.505 mm |
Moisture Sensitivity Level | 1 | Number of Terminals | 28 |
Number of Timers | 1 | Operating Temperature-Max | 70 °C |
Operating Temperature-Min | Package Body Material | PLASTIC/EPOXY | |
Package Code | QCCJ | Package Equivalence Code | LDCC28,.5SQ |
Package Shape | SQUARE | Package Style | CHIP CARRIER |
Power Supplies ! | 5 V | Qualification Status ! | Not Qualified |
Seated Height-Max | 4.57 mm | Supply Voltage-Max | 5.5 V |
Supply Voltage-Min | 4.5 V | Supply Voltage-Nom | 5 V |
Surface Mount ! | YES | Technology | CMOS |
Temperature Grade ! | COMMERCIAL | Terminal Finish | TIN LEAD |
Terminal Form ! | J BEND | Terminal Pitch ! | 1.27 mm |
Terminal Position | QUAD | Time-Min | SECONDS |
Volatile | YES | Width | 11.505 mm |
uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。
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