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CY74FCT191T

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可预置同步 4 位二进制加/减计数器

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CY74FCT191T

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Function Binary Counter, Counter Bits (#) 4 Technology family FCT Input type TTL, TTL-Compatible CMOS Output type CMOS, Push-Pull Features Partial power down (Ioff), Presettable, Ultra high speed (tpd <5ns) Operating temperature range (°C) -40 to 85 Rating Catalog
Function Binary Counter, Counter Bits (#) 4 Technology family FCT Input type TTL, TTL-Compatible CMOS Output type CMOS, Push-Pull Features Partial power down (Ioff), Presettable, Ultra high speed (tpd <5ns) Operating temperature range (°C) -40 to 85 Rating Catalog
SOIC (DW) 16 106.09 mm² (10.3 mm × 10.3 mm) SSOP (DBQ) 16 29.4 mm² (4.9 mm × 6 mm)
  • Function, Pinout, and Drive Compatible With FCT and F Logic
  • Reduced VOH (Typically = 3.3 V) Versions of Equivalent FCT Functions
  • Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
  • Ioff Supports Partial-Power-Down Mode Operation
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • Matched Rise and Fall Times
  • 64-mA Output Sink Current
    32-mA Output Source Current
  • Function, Pinout, and Drive Compatible With FCT and F Logic
  • Reduced VOH (Typically = 3.3 V) Versions of Equivalent FCT Functions
  • Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
  • Ioff Supports Partial-Power-Down Mode Operation
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • Matched Rise and Fall Times
  • 64-mA Output Sink Current
    32-mA Output Source Current

The CY74FCT191T is a reversible modulo-16 binary counter, featuring synchronous counting and asynchronous presetting. The preset allows the CY74FCT191T to be used in programmable dividers. The count enable input, terminal count output, and ripple-clock output make possible a variety of methods of implementing multiusage counters. In the counting modes, state changes are initiated by the rising edge of the clock.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The CY74FCT191T is a reversible modulo-16 binary counter, featuring synchronous counting and asynchronous presetting. The preset allows the CY74FCT191T to be used in programmable dividers. The count enable input, terminal count output, and ripple-clock output make possible a variety of methods of implementing multiusage counters. In the counting modes, state changes are initiated by the rising edge of the clock.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 4-Bit Up/Down Binary Counter 数据表 (Rev. A) 2001-9-1
* 用户指南 CYFCT Parameter Measurement Information 2001-4-2

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封装 引脚 CAD 符号、封装和 3D 模型
SOIC (DW) 16 Ultra Librarian
SSOP (DBQ) 16 Ultra Librarian
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