CD74AC151M96 - 8-Input Multiplexer, 16-SOIC | Texas Instruments
MPN： CD74AC151M96 ✓ 啟用中CD74AC151M96 概覽
A multiplexer (MUX) is a combinational logic device that routes one of several input signals to a single output line, forming a key element in the hierarchy of digital logic ICs: MUX -> combinational logic -> logic IC -> semiconductor. Multiplexers perform parallel-to-serial conversion, data source selection, and Boolean function generation of up to four variables in a single package.
Key features include operation from 1.5V to 5.5V supply per the AC family specification, balanced noise immunity of 30% of the supply voltage, and propagation delays as low as 5.5 ns at 5V - speed comparable to bipolar F, AS, and S logic families with CMOS low static power consumption. Outputs source or sink up to 24 mA, enabling direct drive of substantial fan-out loads.
The advanced CMOS process delivers high noise immunity and low quiescent dissipation, with TTL-level input compatibility at 5V operation. Balanced propagation and transition times minimize output skew in high-speed systems. The wide -55C to +125C operating range of this package supports industrial and military-temperature designs.
Typical applications include microprocessor data routing, parallel-to-serial converters, Boolean function generators, communication channel selection, and test-equipment signal switching, where the complementary W output eliminates the need for an external inverter.
Design tip: properly terminate the enable and select lines to avoid undefined states, and use a pull-up or pull-down resistor on Y/W when the device may be disabled. Account for input capacitance when routing high-speed signals.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 CD74AC151M96 — 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： CD74AC151M96 （相同外形與佔位） — 差異在於 Function, Noise Immunity, Package.
CD74AC151QM96Q1
✅ 直接替換聯絡詢價
查看資料表 →CD74ACT151M96
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
74AC151SC
✅ 直接替換📋 參考替代品（不在目錄中）
SN74HC151NSR
✅ 直接替換📋 參考替代品（不在目錄中）
CD74AC151M96 最大額定值與電氣特性
| 功能 | 8-Input Multiplexer (1 x 8:1) |
| Logic Family | AC (Advanced CMOS) |
| Supply Voltage Range | 1.5 V to 5.5 V |
| Propagation Delay | 5.5 ns at 5 V |
| Output Drive Current | 24 mA (source or sink) |
| Noise Immunity | 30% of supply voltage (balanced) |
| Outputs | Y (true) and W (complementary) |
| Enable Input | Active-low G; outputs low when asserted |
| 工作溫度 | -55C to +125C |
| 封裝 | 16-pin SOIC (D), surface mount |
| 安裝類型 | Surface Mount |
| Packing | Tape and Reel (-96 suffix) |
| Input Compatibility | TTL-level compatible at 5 V operation |
| Speed Class | Comparable to bipolar F, AS, and S families |
| RoHS 狀態 | Compliant |
| Standby Power | Very low static dissipation (CMOS) |
CD74AC151M96 腳位配置
| 腳位 1 | D3 — Data input 3 |
| 腳位 2 | D4 — Data input 4 |
| 腳位 3 | D5 — Data input 5 |
| 腳位 4 | D6 — Data input 6 |
| 腳位 5 | D7 — Data input 7 |
| 腳位 6 | G — Enable (active-low); forces outputs low when asserted |
| 腳位 7 | W — Complementary (inverted) output |
| 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 | Y — True output |
| 腳位 13 | D0 — Data input 0 |
| 腳位 14 | D1 — Data input 1 |
| 腳位 15 | D2 — Data input 2 |
| 腳位 16 | VCC — Power supply (1.5 V to 5.5 V) |
典型應用
CD74AC151M96 適用於 6 應用s: Microprocessor Data Routing, Parallel-to-Serial Conversion, Boolean Function Generators, Industrial Sensor Channel Selection, Communication Channel Selection, Test and Measurement Signal Switching.
Microprocessor Data Routing
The CD74AC151M96 fits microprocessor and microcontroller data-path routing where one of eight peripheral or bus sources must be steered onto a shared line. Its 5.5 ns propagation delay at 5V keeps selection latency negligible relative to typical bus cycles, and the 24 mA output drive allows direct connection to heavily loaded backplanes without buffering. The active-low enable G supports zero-latency gating of the selected channel under CPU control, while the complementary W output can feed parity or comparison logic without an external inverter. Place the device close to the driving sources to limit stub lengths; the balanced AC-family transition times minimize reflections on short controlled-impedance traces at 5V operation.
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Parallel-to-Serial Conversion
The TI datasheet lists parallel-to-serial conversion as a primary application for the CD74AC151. An 8-bit parallel word applied to D0-D7 is serialized by clocking the A, B, C select lines with a 3-bit binary counter; the Y output delivers one bit per clock. With 5.5 ns propagation delay at 5V, output jitter relative to the counter clock is minimal, supporting serial rates into the tens of MHz. The W complementary output provides both polarities for differential or Manchester-style encoding stages. Because the AC family draws near-zero static current, battery-powered telemetry and industrial sensor serializers benefit from low standby drain between bursts. Synchronize the counter reset to the word boundary to maintain frame alignment.
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Boolean Function Generators
An 8:1 multiplexer directly implements any Boolean function of three variables: hard-wire D0-D7 to the truth-table values and drive A, B, C with the input variables. With the W complementary output, the CD74AC151 can implement functions of up to four variables in one 16-SOIC package without external inversion, exactly as described in the TI datasheet. The 5.5 ns delay at 5V makes the generated function fast enough for glue-logic in control paths, and 24 mA drive supports cascading into additional gates. Compared with programming a CPLD for a single three- or four-variable function, this MUX solution has zero configuration overhead, deterministic single-pass timing, and immediate availability in the -55C to +125C range for harsh environments.
推薦
Industrial Sensor Channel Selection
In industrial monitoring systems the CD74AC151M96 selects among eight digital sensor status lines (limit switches, comparators, encoders) under controller command. The -55C to +125C operating range covers unconditioned cabinets and outdoor enclosures, and the balanced 30%-of-VCC noise immunity rejects the ground bounce typical of motor-driven factory floors. The active-low enable allows a supervisory MCU to blank all channels during scan reconfiguration, preventing glitch pulses from propagating to the alarm logic on Y. At 5V operation, TTL-level input compatibility permits direct connection to legacy 5V comparator outputs such as those of the LM393, simplifying mixed-technology retrofits of existing panels without extra level-shifting stages.
推薦
Communication Channel Selection
Telecom and datacom line cards use the CD74AC151M96 to route one of eight status, clock, or serial-data channels to a common monitoring or processing point. The 5.5 ns delay at 5V keeps channel-switch settling under a microsecond including counter latency, enabling fast protection switching between redundant links. The complementary Y/W outputs feed both the receiver path and a local status LED or monitoring ADC input. The AC family's balanced propagation and transition times reduce skew between the selected channel and its enable gate, important when the output clocks downstream recovery circuits. The wide temperature range and CMOS low static power suit remote outdoor equipment with passive cooling and no fans.
推薦
Test and Measurement Signal Switching
Automated test equipment uses the CD74AC151M96 as a front-end selector routing one of eight test points to a measurement or stimulus chain. Deterministic 5.5 ns switching at 5V allows the sequencer to predict settle time precisely, and the enable input provides a clean gating edge that prevents half-selected transients from reaching sensitive instruments. The complementary output W can drive a mirror signal path for simultaneous pass/fail comparison. The -55C to +125C rating permits use in temperature-chamber test heads where ambient varies widely during thermal testing. The 24 mA drive comfortably handles terminated coax inputs, and the SOIC-16 footprint supports compact multiplexer banks on probing fixtures.
推薦
推薦產品摘要
工程參考資料，適用於 CD74AC151M96 — 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 | CD74AC151QM96Q1 | CD74ACT151M96 | 74AC151SC | SN74HC151NSR |
|---|---|---|---|---|---|
| Package | 16-SOIC (D) | 16-SOIC (D) - same | 16-SOIC (D) - same | 16-SOIC - same footprint | SOIC-16 (NS) - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | Texas Instruments |
| Function | 8:1 MUX with Y and W outputs | 8:1 MUX with Y and W outputs | 8:1 MUX with Y and W outputs | 8:1 MUX with Y and W outputs | 8:1 MUX with Y and W outputs |
| Logic Family | AC (Advanced CMOS) | AC (Automotive Q1) | ACT (TTL-input AC) | AC | HC (High-speed CMOS) |
| Automotive Qualification | No | Yes (AEC-Q100) | No | No | No |
| Input Threshold Type | CMOS (TTL-compatible at 5 V) | CMOS (same family) | TTL | CMOS (AC family) | CMOS |
主要差異化特點
- Bipolar-class speed with CMOS power (對比SN74HC151NSR)
- Complementary Y and W outputs (對比CD74ACT151M96)
- Automotive upgrade path without PCB change (對比CD74AC151QM96Q1)
設計說明
Never leave the A, B, C select lines or the active-low enable G floating - CMOS inputs drift to undefined logic states and can cause both Y and W to glitch or the device to draw shoot-through current. Terminate unused select combinations by tying them through pull resistors. When the device may be disabled in normal operation, add a pull-up or pull-down resistor on the Y and W net so downstream logic sees a defined level while outputs are forced low.
At 5V with 5.5 ns propagation delay, AC-family edge rates are fast enough to make short traces behave as transmission lines. Keep Y and W traces under about one-third of the signal rise distance or add series termination (22-33 ohm) at the driver. The 24 mA output drive into a 50-ohm environment can overshoot strongly; balance AC termination (series R plus capacitor to ground) at the receiver when running backplanes. Account for the MUX input capacitance when many D inputs share a common source bus.
Estimated: although AC-family static current is near zero, simultaneous switching of the select decoder can draw transient supply spikes. Decouple each CD74AC151M96 with a 0.1 uF ceramic capacitor placed within 5 mm of the VCC (pin 16) to GND (pin 8) pair, plus one 4.7-10 uF bulk capacitor per group of devices. At VCC = 5.5 V maximum and 24 mA output load, per-output dissipation stays in the tens of milliwatts - estimated - so no heatsinking is needed, but respect total package power limits per the TI datasheet derating tables.
合規資訊
RoHS compliance per standard TI logic catalog practice; the AEC-Q100 qualified variant for automotive is the CD74AC151QM96Q1. REACH and conflict-minerals status not stated in provided data - verify on ti.com product page.
