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SN74LV8154

現行

具有 3 態輸出暫存器的雙路 16 位元二進位計數器

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產品規格表

SN74LV8154

現行
產品規格表 立即訂購

產品詳細資料

Function Counter Bits (#) 16 Technology family LV-A Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Input type Standard CMOS Output type 3-State Features Balanced outputs, High speed (tpd 10-50ns), Over-voltage tolerant inputs, Partial power down (Ioff) Operating temperature range (°C) -40 to 85 Rating Catalog
Function Counter Bits (#) 16 Technology family LV-A Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Input type Standard CMOS Output type 3-State Features Balanced outputs, High speed (tpd 10-50ns), Over-voltage tolerant inputs, Partial power down (Ioff) Operating temperature range (°C) -40 to 85 Rating Catalog
PDIP (N) 20 228.702 mm² 24.33 x 9.4 TSSOP (PW) 20 41.6 mm² 6.5 x 6.4
  • Can Be Used as Two 16-Bit Counters or a Single 32-Bit Counter
  • 8-bit counter read bus
  • 2-V to 5.5-V VCC Operation
  • Maximum tpd of 25 ns at 5 V (RCLK to Y)
  • Typical VOLP (Output Ground Bounce)
    < 0.7 V at VCC = 5 V, TA = 25°C
  • Typical VOHV (Output VOH Undershoot)
    > 4.4 V at VCC = 5 V, TA = 25°C
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 250 mA
    Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • Can Be Used as Two 16-Bit Counters or a Single 32-Bit Counter
  • 8-bit counter read bus
  • 2-V to 5.5-V VCC Operation
  • Maximum tpd of 25 ns at 5 V (RCLK to Y)
  • Typical VOLP (Output Ground Bounce)
    < 0.7 V at VCC = 5 V, TA = 25°C
  • Typical VOHV (Output VOH Undershoot)
    > 4.4 V at VCC = 5 V, TA = 25°C
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 250 mA
    Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

The SN74LV8154 device is a dual 16-bit binary counter with 3-state output registers, designed for 2-V to 5.5-V VCC operation.

The counters have dedicated clock inputs. The counters share a clocked storage register to sample and save the counter contents. Both counters share an asynchronous clear input. The 32-bit storage register can be mapped on the output bus 8-bits at a time. Four bus reads are needed to access the contents of both stored counts. The two counters can be chained by connecting CLKBEN to RCOA. All clocks are positive edge triggered. All other inputs are active low.

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 SN74LV8154 device is a dual 16-bit binary counter with 3-state output registers, designed for 2-V to 5.5-V VCC operation.

The counters have dedicated clock inputs. The counters share a clocked storage register to sample and save the counter contents. Both counters share an asynchronous clear input. The 32-bit storage register can be mapped on the output bus 8-bits at a time. Four bus reads are needed to access the contents of both stored counts. The two counters can be chained by connecting CLKBEN to RCOA. All clocks are positive edge triggered. All other inputs are active low.

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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* Data sheet SN74LV8154 Dual 16-Bit Binary Counters With 3-State Output Registers datasheet (Rev. B) PDF | HTML 2020年 4月 27日

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