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NXP Semiconductors N74F157AD,602
- Part No.:
- N74F157AD,602
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
N74F157AD,602.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
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Product details
Overview
N74F157AD,602 from Philips Semiconductors is a quad 2-input non-inverting data selector/multiplexer in 16-pin SO package (SOT109-1), operating at 5V ±10%, with 4.6ns typical propagation delay, 15mA typical supply current, and industrial-grade temperature range (–40°C to +85°C). It routes four parallel data bits from one of two input sources to a common bus under shared Select (S) and active-low Enable (E) control-commonly used in register-to-bus data routing in TTL-level digital systems.
For engineers reviewing the N74F157AD,602 datasheet, N74F157AD,602 pinout, N74F157AD,602 application, or N74F157AD,602 equivalent, key selection considerations include its non-inverting output logic, guaranteed 20mA sink capability per output, compatibility with standard FAST TTL loading (1.0 U.L.), and SO16 footprint for space-constrained PCB layouts.
Technical Context
The N74F157AD,602 implements four independent 2:1 multiplexers sharing a single Select (S) line and an active-low Enable (E) line. Each Yn output follows the selected I0n or I1n input without inversion, enabling direct bus coupling without additional logic inversion.
It operates strictly within 4.5V–5.5V VCC and supports commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges. Input thresholds are VIH ≥ 2.0V and VIL ≤ 0.8V; outputs drive up to 20mA low and –1mA high, meeting FAST TTL interface requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures stable operation across standard 5V power rail tolerances. |
| Propagation Delay (I0n/I1n → Yn) | Typ. 4.6ns, max 7.5ns - Enables high-speed data switching in synchronous digital systems. |
| Output Drive (IOL) | 20mA per output - Supports direct fan-out to up to 33 FAST TTL loads or driving small LEDs/buffers. |
| Input Loading | 1.0 FAST unit load (20µA/0.6mA) - Matches standard FAST TTL input impedance for predictable signal integrity. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial embedded control and instrumentation applications. |
| Enable Polarity | Active-low (E = High forces all Yn = Low) - Allows simple global disable via pull-up or microcontroller GPIO. |
Pinout & Package
Package: 16-pin plastic small outline (SO16), body width 3.9 mm, SOT109-1 footprint - surface-mount compatible with automated assembly and higher board density than DIP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 11, 10, 14, 13, 15, 12, 9, 7 | Data inputs (I0a–I0d, I1a–I1d), Select (S), Enable (E) | Two parallel 4-bit data buses (I0n/I1n), plus shared control lines for compact multiplexing logic. |
| 16 | VCC | Positive supply pin - must be decoupled locally with 0.1µF ceramic capacitor. |
| 8 | GND | Ground reference - requires low-impedance connection to system ground plane. |
| 15, 1, 4, 7 | Outputs (Ya, Yb, Yc, Yd) | Non-inverting multiplexed outputs - each drives up to 20mA low, compatible with TTL/CMOS inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 2:1 multiplexing | Four independent channels share S and E pins - reduces control logic and PCB routing vs discrete gates. |
| Non-inverting outputs | Eliminates need for external inverters when interfacing with positive-logic systems or bus transceivers. |
| FAST TTL compatibility | Meets FAST TTL voltage thresholds, loading, and speed specs - ensures drop-in replacement in legacy 74F designs. |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for factory automation, motor control, and outdoor electronics. |
Applications
| Microprocessor Data Bus Switching | Digital Test Equipment Signal Routing |
|---|---|
|
Use Scenario: Selecting between two 4-bit register banks (e.g., accumulator vs temporary register) during ALU operations in an 8-bit CPU design. IC Role / Device Role / Timing Role: Quad 2:1 data selector synchronizing register read paths to a shared data bus with <7.5ns delay. Use Value: Reduces gate count by replacing eight discrete 2-input multiplexers and simplifies timing analysis with single S/E control. |
Use Scenario: Routing stimulus signals from multiple pattern generators to a DUT input in automated test fixtures. IC Role / Device Role / Timing Role: High-speed signal path selector enabling rapid test mode changes without FPGA reconfiguration. Use Value: 4.6ns propagation delay ensures sub-10ns channel switching, critical for high-throughput ATE cycle time reduction. |
| Industrial PLC I/O Multiplexing | Legacy System Bus Arbitration |
|
Use Scenario: Consolidating status inputs from two sets of field sensors (e.g., temperature and pressure arrays) onto a single controller ADC interface. IC Role / Device Role / Timing Role: Industrial-grade multiplexer providing reliable signal selection in noisy factory environments. Use Value: –40°C to +85°C rating and 20mA output drive ensure robustness against EMI and long cable loads. |
Use Scenario: Arbitrating between two memory-mapped peripheral modules sharing a common address/data bus in retro-computing hardware. IC Role / Device Role / Timing Role: Non-inverting bus switch enabling clean signal pass-through with no added logic inversion delay. Use Value: Pin-compatible with original 74F157 designs - allows direct replacement in vintage system repairs and upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F157N | Dual-in-line package (DIP16, SOT38-4); identical electrical specs but through-hole mounting. | Suitable for prototyping, breadboarding, or legacy through-hole production lines. | Select SN74F157N when manual assembly or socket-based testing is required. |
| 74ACT157SCX | Advanced CMOS (ACT) family: 5V supply, 3.5ns typ. delay, 24mA IOL, but only commercial temp range (0°C to +70°C). | Better speed and drive, but not rated for industrial environments. | Choose 74ACT157SCX only if higher speed and lower power are prioritized over extended temperature operation. |
Compared with SN74F157N and 74ACT157SCX, the N74F157AD,602 uniquely combines SO16 surface-mount packaging, industrial temperature qualification, and proven FAST TTL compatibility-making it optimal for volume-manufactured industrial controllers where reliability and assembly efficiency are critical.
Availability
N74F157AD,602 is available at Aetrix Electronics and suitable for industrial PLCs, digital test equipment, microprocessor bus interfaces, and legacy system upgrades requiring stable component supply and long-term lifecycle support.
Supply support for N74F157AD,602 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Philips Semiconductors (now NXP Semiconductors) is a pioneer in logic IC development, delivering high-reliability, industry-standard TTL and CMOS families since the 1970s.
The 74F logic series-including the N74F157AD,602-was engineered for high-speed, low-power digital systems in industrial and computing applications, emphasizing pin compatibility, noise immunity, and broad temperature operation.
FAQ
What is the function of the Enable (E) pin on the N74F157AD,602?
The Enable (E) pin on the N74F157AD,602 is active-low: when E is HIGH, all four outputs (Ya–Yd) are forced LOW regardless of S or input states. When E is LOW, the device operates normally, routing I0n or I1n to Yn based on S. This enables global output disable for bus contention prevention or power gating in the N74F157AD,602.
Does the N74F157AD,602 support 3.3V logic levels?
No, the N74F157AD,602 is specified only for 4.5V–5.5V VCC operation and requires VIH ≥ 2.0V and VIL ≤ 0.8V. It is not 3.3V-tolerant; applying 3.3V inputs may result in undefined behavior or failure to meet timing specs. For 3.3V systems, consider logic-level translators or 3.3V-native multiplexers instead of the N74F157AD,602.
What is the maximum capacitive load the N74F157AD,602 can drive reliably?
The N74F157AD,602 is characterized for CL = 50pF in AC specifications, with propagation delays measured under that condition. While it can drive heavier loads, exceeding 50pF increases propagation delay and may cause waveform degradation. For >50pF loads, buffer stages or reduced trace lengths are recommended to maintain timing integrity in the N74F157AD,602.
Is the N74F157AD,602 pin-compatible with the 74LS157?
No-the N74F157AD,602 and 74LS157 share identical pinout (SOT109-1/SO16), but differ electrically: the N74F157AD,602 has faster propagation (4.6ns vs ~15ns), higher drive (20mA vs 8mA), and different input thresholds. Direct substitution may work in some cases, but timing and loading margins must be verified for the N74F157AD,602.
Where is the ground (GND) pin located on the N74F157AD,602 SO16 package?
The GND pin for the N74F157AD,602 is Pin 8, located on the bottom row (counting left-to-right from the index mark), consistent with standard 16-pin SO packages. Proper grounding of Pin 8 is essential for noise immunity and stable operation of the N74F157AD,602.
N74F157AD,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 1mA, 20mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
N74F157AD,602 FAQ
1.How can I place an order for N74F157AD,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F157AD,602 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for N74F157AD,602 reliable?
The price and inventory of N74F157AD,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F157AD,602 is usually 5 days.
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N74F157AD,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F157AD,602 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for N74F157AD,602?
For technical support, including N74F157AD,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F157AD,602 requirements.
6.How does Aetrix verify that N74F157AD,602 is sourced from the original manufacturer or authorized distributors?
All N74F157AD,602 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that N74F157AD,602 meets industry standards.
7.What is the process for return or replacement of N74F157AD,602?
All N74F157AD,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F157AD,602, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The N74F157AD,602 part is unused and in its original packaging.
Return procedure for N74F157AD,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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