CD74AC151QM96Q1 - 8:1 Mux, AEC-Q100 | Texas Instruments
MPN： CD74AC151QM96Q1 ✓ 啟用中CD74AC151QM96Q1 概覽
A digital multiplexer is a combinational logic circuit that forwards one of several input signals to a single output line, selected by binary control address inputs. In the logic IC hierarchy, the multiplexer sits under combinational logic > data routing ICs within the broader category of 4000/7400-family digital logic. Multiplexers can also act as Boolean function generators of up to four variables, parallel-to-serial converters, and data source selectors.
Key features include 8:1 selection with complementary outputs, high-speed AC-family switching comparable to bipolar F, AS, and S speed classes, operation up to 5.5 V, and balanced CMOS noise immunity. The Q1 suffix denotes AEC-Q100 qualification, making the part suitable for automotive and harsh-environment designs where temperature cycling, ESD robustness, and quality requirements exceed commercial grades.
The CD74AC151 uses advanced CMOS technology for low static power consumption combined with fast propagation delays, making it appropriate for address decoding, sensor-source selection, and data-routing in automotive ECUs, industrial control modules, and instrumentation front ends.
Typical applications include automotive body and powertrain control modules selecting among sensor channels, parallel-to-serial data conversion in microcontroller-based systems, and universal logic-function generation in FPGA glue logic and test equipment.
Design tip: tie the strobe (active-low enable) low for continuous selection, and keep unused data inputs at defined logic levels to prevent floating CMOS inputs that increase supply noise and current.
直接替換替代品，適用於 CD74AC151QM96Q1 — 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： CD74AC151QM96Q1 （相同外形與佔位） — 差異在於 Function, Noise Immunity, Package.
CD74AC151M96
✅ 直接替換聯絡詢價
查看資料表 →CD74AC151M96
✅ 直接替換聯絡詢價
查看資料表 →CD74HC151M96
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CD74HCT151M96
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC74HC151ADG
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
74HC151D,653
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CD74AC151QM96Q1 最大額定值與電氣特性
| 功能 | 8-line to 1-line data selector/multiplexer |
| Number of Input Lines | 8 |
| Number of Output Lines | 2 (Y true, W complementary) |
| Family | CD74AC (Advanced CMOS) |
| Supply Voltage Range | 1.5 V to 5.5 V |
| Noise Immunity | 30% of supply voltage |
| Select Inputs | 3 (A, B, C address) |
| Enable | Active-low strobe (G') |
| Qualification | AEC-Q100 automotive grade |
| 封裝 | SOIC-16 (M) |
| 安裝類型 | Surface Mount |
| Packaging | Tape and Reel (M96 suffix) |
CD74AC151QM96Q1 腳位配置
| 腳位 1 | D3 — Data input 3 |
| 腳位 2 | D2 — Data input 2 |
| 腳位 3 | D1 — Data input 1 |
| 腳位 4 | D0 — Data input 0 |
| 腳位 5 | Y — True output |
| 腳位 6 | W — Complementary output |
| 腳位 7 | G' — Active-low strobe/enable |
| 腳位 8 | GND — Ground |
| 腳位 9 | C — Select input C (MSB) |
| 腳位 10 | B — Select input B |
| 腳位 11 | A — Select input A (LSB) |
| 腳位 12 | D7 — Data input 7 |
| 腳位 13 | D6 — Data input 6 |
| 腳位 14 | D5 — Data input 5 |
| 腳位 15 | D4 — Data input 4 |
| 腳位 16 | VCC — Power supply, 1.5 V to 5.5 V |
典型應用
CD74AC151QM96Q1 適用於 6 應用s: Automotive Sensor Source Selection, Parallel-to-Serial Data Conversion, Boolean Function Generation, Address Decoding and Data Routing, Test and Measurement Equipment, Industrial Control and Automation I/O.
Automotive Sensor Source Selection
The CD74AC151QM96Q1 selects one of eight digital sensor status or switch-bank signals in body control and powertrain modules. Its AEC-Q100 qualification addresses automotive reliability requirements, while the AC family's balanced 30%-of-VCC noise immunity maintains valid logic thresholds in electrically noisy vehicle harness environments. Placed between a switch bank and a microcontroller GPIO port, it reduces the required MCU input count from eight to four (Y output plus 3 select lines), freeing pins for other functions. The complementary W output allows redundancy checking or inverted sensing without external inverters.
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Parallel-to-Serial Data Conversion
As noted in the TI datasheet, the CD74AC151 can perform as a parallel-to-serial converter: an 8-bit parallel word is applied to D0-D7 while a 3-bit binary counter drives the select inputs, serializing data at the Y output at the counter clock rate. The AC family's fast, uniform propagation delays keep bit-to-bit timing skew low, important for strobed acquisition systems. The strobe input gates the output during counter transitions to suppress glitches, and the W output provides the inverted serial stream for differential or redundant transmission paths in industrial acquisition front ends.
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Boolean Function Generation
The CD74AC151 operates as a universal function generator producing any logic function of four variables, per the TI datasheet. The three select inputs A-C take the function variables, each data input is strapped to VCC or GND according to the truth table, and Y delivers the result. Compared with discrete AND/OR gate networks, a single SOIC-16 device replaces many gates, cutting BOM count and propagation delay variance. The Q1 grade allows use of this technique in automotive diagnostic and arbitration logic where fast, deterministic combinational resolution is required.
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Address Decoding and Data Routing
In microprocessor and embedded control boards, the CD74AC151 routes one of eight register or memory-mapped status lines to a single CPU input under 3-bit address control. AC-family speed, comparable to bipolar F, AS, and S classes per the datasheet, keeps decode latency small relative to bus cycles. The active-low strobe can be driven directly by a chip-select signal so the Y output stays high (inactive) when the block is not addressed, eliminating external gating. The automotive-qualified Q1 version suits vehicle gateway and body-controller boards exposed to wide temperature ranges.
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Test and Measurement Equipment
Bench instruments and automated test fixtures use the CD74AC151QM96Q1 to multiplex eight digital test points into one instrument channel under programmatic select control. The 1.5 V to 5.5 V operating range lets one board design serve 1.8 V, 3.3 V, and 5 V logic test targets. Balanced CMOS noise immunity of 30% of VCC keeps readings stable near switching thresholds. The strobe input blanks the output between measurement windows, preventing glitch propagation into comparators or counters during select-address changes.
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Industrial Control and Automation I/O
PLCs and industrial I/O modules use the CD74AC151QM96Q1 to consolidate eight discrete limit-switch or relay-status inputs into a single microcontroller line. While this digital mux handles logic-level signals, pairing it with proper input conditioning (optocouplers or TVS-protected buffers) addresses industrial surge environments. The SOIC-16 footprint supports compact, reflow-soldered designs, and the complementary W output enables wired alarm logic. Select-line sequencing by the controller scans all eight channels in eight clock cycles for deterministic polling.
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推薦產品摘要
工程參考資料，適用於 CD74AC151QM96Q1 — 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 | CD74AC151M96 | CD74HC151M96 | MC74HC151ADG |
|---|---|---|---|---|
| Package | SOIC-16 (M) | SOIC-16 (M) - same | SOIC-16 (M) - same | SOIC-16 - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Logic Family | AC (Advanced CMOS) | AC | HC | HC |
| Supply Voltage Range | 1.5 V to 5.5 V | 1.5 V to 5.5 V | 2 V to 6 V | 2 V to 6 V |
| Relative Speed | Fast (comparable to bipolar F/AS/S) | Fast (same die) | Slower | Slower |
| Outputs | Y + complementary W | Y + W | Y + W | Y + W |
主要差異化特點
- AEC-Q100 automotive qualification (對比CD74AC151M96)
- AC-family speed at wide supply range (對比CD74HC151M96)
- Complementary dual outputs (對比Single-output mux alternatives)
設計說明
Never leave CMOS inputs floating. Tie unused data inputs D0-D7 to GND or VCC, and drive the strobe G' to a defined level even when the mux is always enabled. Floating inputs on the AC family cause intermediate conduction in the input stage, increasing supply current and noise susceptibility. Use 0.1 uF ceramic decoupling per device close to VCC pin 16 and GND pin 8.
During select-address transitions, the Y output can glitch before settling. If the output feeds a counter or clocked device, qualify it with the strobe input or add a latch (e.g., SN74HC374) clocked after select settling. The complementary W output switches simultaneously and can help with redundant or diagnostic paths. Keep select traces short and away from noisy harness routing in automotive applications.
The AC family combines CMOS static operation with fast edge rates; ground bounce increases with simultaneous output switching and low VCC operation. Use a solid ground plane, keep output load capacitance modest, and series-terminate long output traces if driving wiring harnesses. Confirm exact ICC, propagation delay, and drive current values from the TI CD74AC151 datasheet Rev. B before finalizing power and timing budgets.
合規資訊
AEC-Q100 qualification inferred from TI Q1 ordering suffix. RoHS/REACH/lead-free status must be confirmed on the TI product page for the exact ordering part number.
