產品詳細資料

Function General-purpose timer Iq (typ) (mA) 2 Rating Catalog Operating temperature range (°C) -40 to 105 Supply voltage (max) (V) 16 Supply voltage (min) (V) 4.5
Function General-purpose timer Iq (typ) (mA) 2 Rating Catalog Operating temperature range (°C) -40 to 105 Supply voltage (max) (V) 16 Supply voltage (min) (V) 4.5
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Timing from microseconds to hours
  • Astable or monostable operation
  • Adjustable duty cycle
  • TTL-compatible output can sink or source up to 200mA
  • On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
  • Timing from microseconds to hours
  • Astable or monostable operation
  • Adjustable duty cycle
  • TTL-compatible output can sink or source up to 200mA
  • On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.

The Nx555 and Sx555 devices are precision timing circuits capable of producing accurate time delays or oscillation. In time-delay or monostable operating modes, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle are controlled independently with two external resistors and a single external capacitor.

Each timer has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage pin (CONT). When the trigger input (TRIG) is less than the trigger level, the flip-flop is set and the output goes high. If TRIG is greater than the trigger level and the threshold input (THRES) is greater than the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) overrides all other inputs and is used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge pin (DISCH) and the ground pin (GND). Tie all unused inputs to an appropriate logic level to prevent false triggering

The output circuit is capable of sinking or sourcing current up to 200mA. Operation is specified for supplies of 5V to 15V. With a 5V supply, output levels are compatible with TTL inputs.

The Nx555 and Sx555 devices are precision timing circuits capable of producing accurate time delays or oscillation. In time-delay or monostable operating modes, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle are controlled independently with two external resistors and a single external capacitor.

Each timer has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage pin (CONT). When the trigger input (TRIG) is less than the trigger level, the flip-flop is set and the output goes high. If TRIG is greater than the trigger level and the threshold input (THRES) is greater than the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) overrides all other inputs and is used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge pin (DISCH) and the ground pin (GND). Tie all unused inputs to an appropriate logic level to prevent false triggering

The output circuit is capable of sinking or sourcing current up to 200mA. Operation is specified for supplies of 5V to 15V. With a 5V supply, output levels are compatible with TTL inputs.

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類型 標題 日期
* Data sheet xx555 Precision Timers datasheet (Rev. J) PDF | HTML 2025年 2月 11日
Application note Considering TI Smart DACs As an Alternative to 555 Timers PDF | HTML 2021年 9月 2日
Design guide AC-Coupled RS-485 Design Guide 2016年 6月 15日
Design guide Automatic Direction Control RS-485 Design Guide 2016年 6月 2日

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PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
參考設計

TIDA-01365 — 雙向 RS-485 扇出集線器參考設計

The Bidirectional RS-485 Fan-Out Hub Reference Design (TIDA-01365) documents and tests an RS-485 fan-out hub design where 1:N and N:1 RS-485 signals are aggregated in and out of any bus topology. This design also features automatic direction control, for reduced pin count on microcontrollers, and (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01090 — RS-485 自動方向控制參考設計

The TIDA-01090 reference design enables half-duplex communication over an RS-485 bus without requiring additional driver-enable/receiver-enable controls.  The design allows for the transceiver used on each node to go into transmit mode automatically when data is being transmitted from a local (...)
Design guide: PDF
電路圖: PDF
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PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian

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