SN74LS92D - Divide-by-12 4-Bit Counter | Texas Instruments
MPN： SN74LS92D ✓ 啟用中SN74LS92D 概覽
A counter IC is a synchronous sequential-logic device that advances an internal binary state when it receives an active clock transition. The SN74LS92 belongs to the broader 74LS TTL family, which combines digital counting functions with standard bipolar logic interfaces. Divide-by-12 operation is useful when a system needs a repetitive 12-state sequence rather than a binary modulus of 2, 8, or 16. The output state can therefore be decoded for clock-enable generation, event counting, phase selection, or repetitive control sequencing.
The verified data specifically identifies a 4-bit counter, one element, positive-edge triggering, and a divide-by-12 function. The 14-pin SOIC package is the confirmed physical format for the SN74LS92D ordering code. Other operating details, including supply voltage limits, propagation delay, output drive capability, current consumption, and temperature limits, were not included in the supplied verified records and must be confirmed against the manufacturer datasheet before design release.
Typical uses include industrial timing modules, digital clock dividers, pulse and event counters, sequencing controllers, and educational digital-logic systems. The positive-edge trigger means the counter changes state on the designated clock transition rather than every clock level. Designers should preserve the counter’s reset behavior and unused input states according to the manufacturer datasheet, and should not substitute a generic counter unless its count modulus, pinout, voltage interface, and timing characteristics are verified as compatible.
The primary design consideration is package and logic-family compatibility. SN74LS92D uses a 14-pin SOIC footprint, so a proposed replacement must match that footprint and confirm every terminal function. Supply-voltage compatibility, output timing, fan-out, and signal-integrity margin are especially important when the counter interfaces with slower TTL, faster CMOS, microcontroller, or optocoupler-based systems.
This page consolidates verified distributor information, official Texas Instruments product identification, package data, application context, and replacement-screening guidance. The available records do not provide a verified unit price, complete electrical limit table, or five distinct drop-in alternatives; those fields are intentionally marked for verification rather than inferred.
直接替換替代品，適用於 SN74LS92D — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SN74LS92D （相同外形與佔位） — 差異在於 Counter Type, Counting Direction, Logic Family, Mounting Type, Package.
SN74LS92DE4
✅ 直接替換📋 參考替代品（不在目錄中）
SN74LS92D 最大額定值與電氣特性
| Counter Type | Divide-by-12 counter |
| Logic Family | 74LS |
| Number of Counter Elements | 1 element |
| Counter Width | 4 bit |
| Counting Direction | Up counter |
| Clock Edge | Positive edge |
| 封裝 | 14-SOIC |
| Package Pin Count | 14 pins |
| 安裝類型 | Surface mount |
SN74LS92D 14 pins 腳位配置指南
SN74LS92D（14 pins 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： SN74LS92D.
請參閱 資料表 以查看完整腳位配置。
典型應用
SN74LS92D 適用於 7 應用s: Digital Clock Division, Event and Pulse Counting, Repetitive Sequencing Control, Industrial Timing Modules, Educational Digital Logic, Clocked Control Interfaces, Digital Logic Prototyping.
Digital Clock Division
The SN74LS92D is a suitable candidate for a digital clock-divider subsystem because the verified device is a 4-bit, positive-edge, divide-by-12 counter. Feeding a clean clock into its clock input can produce a recurring modulo-12 state sequence, allowing one output event to represent twelve input events after the required decoding logic is applied. This is useful when a controller needs a slower auxiliary timing reference rather than a simple binary divider. The designer should confirm the exact output truth table, reset state, supply limits, and timing margins in the Texas Instruments datasheet before treating the counter output as a guaranteed clock-enable.
推薦
Event and Pulse Counting
The SN74LS92D can count positive-edge events and organize them into groups of 12 when a system needs repeatable batch counting. The verified DigiKey listing confirms a 4-bit, one-element, positive-edge counter with divide-by-12 behavior, which suits pulse trains from sensors, limit switches, or machine-event sources. Connect the source through a suitable standard-compliant conditioning stage, then decode the counter outputs to generate a batch-complete pulse. Edge rate, noise immunity, reset timing, and output loading must be checked against the manufacturer electrical specifications.
推薦
Repetitive Sequencing Control
The divide-by-12 state sequence makes SN74LS92D appropriate for a compact repetitive sequencer or phase controller. Four counter outputs can represent twelve decoded phases, allowing a controller to activate actuators, display states, or timing windows in a fixed order. The verified function is divide-by-12 rather than a generic binary counter, so the design should use the manufacturer-defined output sequence and reset behavior. Validate timing margins against the slowest external device and ensure the 14-SOIC footprint is compatible with the PCB assembly process.
推薦
Industrial Timing Modules
SN74LS92D can provide a deterministic timing reference for industrial modules that must perform an action after twelve input cycles. The positive-edge trigger helps maintain a defined count event, and the divide-by-12 function offers a convenient modulus for machine cycles, inspection windows, or periodic service intervals. Because the supplied records do not include environmental or timing limits, the part should be qualified against the module’s voltage, temperature, noise, and isolation requirements. Add reset synchronization and appropriate input conditioning for noisy industrial wiring.
推薦
Educational Digital Logic
The SN74LS92D is well suited to laboratory and educational demonstrations because it exposes a clear divide-by-12 counting function in a standard 14-SOIC package. Students can observe the four counter outputs on a logic analyzer or oscilloscope and decode the sequence into 12 distinct states. The verified distributor records support the counter classification, while the package allows straightforward breadboard or perfboard prototyping. A complete lesson should include clock debouncing, reset sequencing, decoupling, and a comparison between the measured sequence and the manufacturer truth table.
推薦
Clocked Control Interfaces
The SN74LS92D can serve as the timing element in a clocked control interface where twelve input pulses correspond to one decoded control event. This arrangement can simplify a repeated-operation counter in test equipment, panel controls, or low-speed automation. The positive-edge definition makes the counter convenient for synchronous state updates, provided the external clock remains within the verified timing limits. Since the supplied data does not include propagation-delay or fan-out values, the designer must not assume compatibility with faster logic without checking the official datasheet.
推薦
Digital Logic Prototyping
The 14-SOIC SN74LS92D is useful for validating modulo-12 counter behavior before a larger control board is finalized. Its documented one-element, 4-bit, positive-edge structure provides a compact building block for testing count decoding, reset recovery, and output-state sequencing. Prototype boards should include a local decoupling capacitor, a defined clock source, and unused-input handling according to the datasheet. Because the verified material does not provide complete voltage, current, or temperature ratings, use it as a logic-level prototype only within manufacturer limits.
推薦
推薦產品摘要
工程參考資料，適用於 SN74LS92D — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SN74LS92DE4 | SN74LS92D |
|---|---|---|---|
| Function | Divide-by-12 counter | Divide-by-12 counter | Divide-by-12 counter |
| Counter Width | 4 bit | 4 bit | 4 bit |
| Clock Edge | Positive edge | Positive edge | Positive edge |
| Counter Elements | 1 element | 1 element | 1 element |
| Package | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- Purpose-specific divide-by-12 function (對比Generic 4-bit binary counter)
- Positive-edge-triggered operation (對比SN74LS92N)
- Confirmed 14-SOIC package for the target ordering code (對比SN74LS92N)
設計說明
Do not treat every 74LS counter as an equivalent: SN74LS92D must specifically provide a divide-by-12 count, positive-edge triggering, 4-bit outputs, and the same 14-SOIC terminal arrangement. The verified records do not provide the full pinout, so obtain the manufacturer datasheet and compare each terminal before layout or replacement approval.
Place the counter close to the clock and reset circuitry, and route the clock path away from noisy switching nodes. A short, continuous clock trace reduces susceptibility to false positive edges, while a deliberate reset return can prevent undefined startup states. Add the manufacturer-recommended bypass capacitor at the supply pins and preserve the package’s exposed copper requirements, if specified.
The verified records identify positive-edge counting but do not provide setup time, hold time, propagation delay, or output-drive values. Therefore, verify the clock source and load timing against the SN74LS92 datasheet rather than using a generic 74LS assumption. If the counter drives slower external logic, use an appropriate buffer and check fan-out, noise margin, and reset recovery timing.
Use a supply rail and decoupling arrangement compatible with the exact SN74LS92D grade and its verified electrical limits. The supplied data does not state current consumption, output levels, or operating voltage, so do not calculate a power budget from another family member. Confirm the voltage tolerance, input thresholds, and absolute maximum ratings in the official datasheet before power sequencing the circuit.
合規資訊
Compliance status was not included in the supplied verified records. Verify RoHS, REACH, lead-free, halogen-free, and conflict-mineral statements from current Texas Instruments product or quality documentation.
