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单词 ttl
释义

TTL


TTL

abbreviation for 1. (Electronics) transistor transistor logic: a method of constructing electronic logic circuits 2. (Photography) through-the-lens: denoting a system of light metering in cameras
Translations
attraverso le lenti

TTL


TTL

(electronics) transistor-transistor logic

TTL

(1)transistor-transistor logic.

TTL

(2)Time to Live.

TTL

(1) (Time To Live) A counter in a network packet that sets a limit to its validity. In order to prevent an IP packet from propagating endlessly through the network, the value in the TTL field is reduced by each router. When TTL reaches 0, the packet is discarded.

(2) (Time To Live) A timestamp in the DNS system, which converts hostnames to IP addresses. Responses use a TTL field to keep the IP address in the user's cache for a limited amount of time. After the time is up, the next request for that IP address must go back to the DNS system. See DNS and DNS rebinding.

(3) (Transistor-Transistor Logic) A digital circuit composed of bipolar junction transistors (BJTs). Widely used in all variety of electronic applications, especially prior to CMOS circuits becoming popular, TTL superseded the earlier RTL (resistor-transistor) and DTL (diode-transistor) logic designs, which used more power. In TTL, transistors are used to both isolate inputs and perform the logic switching. A "TTL" designation on a circuit input or output indicates a digital circuit rather than analog. See 7400 series, ECL, I2L and bipolar transistor.

(4) (Through The Lens) Refers to a single-lens reflex camera that lets the photographer view the scene through the same lens that captures the image. "TTL metering" means that the light is measured from behind the lens to determine the correct shutter and flash settings.
MedicalSeeDNS

TTL


AcronymDefinition
TTLTotal
TTLTime To Live (IP networking)
TTLThrough The Lens (camera)
TTLTransistor-Transistor Logic
TTLThrough The Line (advertising)
TTLTake the L
TTLTime to Leave
TTLTropospheric Transition Layer (atmosphere)
TTLTime to Laugh
TTLTask Team Leader
TTLThank the Lord
TTLTechnology for Teaching and Learning
TTLTalk to You Later (text and chat slang; more commonly seen as TTYL)
TTLTechnical Team Leader
TTLTime to Live
TTLTwin Trapezoidal Link
TTLTransistor to Transistor Logic
TTLTiny Template Library
TTLThrough the Lens
TTLTiptronic Turbo Look
TTLText Transfer Language
TTLTest Technology Library
TTLTo Take Leave
TTLTata Teleservices, Ltd. (India)
TTLTagging, Tracking and Locating
TTLTravel, Transportation and Logistics (industry sector)
TTLTietotekniikan Liiton
TTLType To Learn
TTLTechnology Transfer and Licensing (intellectual property)
TTLTemporary Traffic Lights
TTLThomas Telford Ltd. (UK)
TTLTorpedo Tube Launch
TTLTeaching the Levees (New York)
TTLTax Title & License
TTLTribal Trust Land (land tenure designation)
TTLThe Textbook Letter (Textbook League)
TTLTicket Time Limit
TTLTrauma Team Leader (emergency room; usually a staff surgeon)
TTLTreasury Tax & Loan
TTLTime Tracking Loop
TTLTractor Test Laboratory (University of Nebraska)
TTLTransamerica Trailer Leasing Ltd.
TTLTotal Track Life
TTLTask Table Listing
TTLTotal Terminals International (shipping)
TTLTomchei Tmimim Lubavitch (educational institution of the Lubavitch movement)
TTLTool-Trend Line
TTLTransition Time Length (jitter)
TTLTout Tacot Limouxin (French automobile club)
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更新时间:2025/3/20 12:03:06