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Nexperia USA Inc. 74HCT157DB,118
- Part No.:
- 74HCT157DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT157DB,118.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
74HCT157DB,118 from Nexperia is a quad 2-input TTL-compatible multiplexer IC used for digital signal routing in data selection and bus management circuits. It features a single active-low enable (E) input, a common select (S) line, four independent 2:1 data paths (1Y–4Y), and operates from 4.5 V to 5.5 V with propagation delays as low as 12 ns at VCC = 5 V and CL = 15 pF. It is widely deployed in industrial control logic, microcontroller peripheral interfacing, and address/data bus switching.
For engineers reviewing the 74HCT157DB,118 datasheet, 74HCT157DB,118 pinout, 74HCT157DB,118 application, or 74HCT157DB,118 equivalent, key selection considerations include its TTL-level input compatibility, guaranteed operation over -40 °C to +125 °C, SO16 package footprint, non-inverting data path, and ESD robustness (HBM >2000 V).
Technical Context
The 74HCT157DB,118 implements four independent 2:1 multiplexers sharing one select (S) and one active-low enable (E) control line. Each channel routes either the I0 or I1 input to its corresponding Y output based on S state, with E overriding all outputs to LOW when asserted HIGH.
Its TTL-compatible inputs accept 0.8 V (VIL max) and 2.0 V (VIH min) thresholds at VCC = 5 V, ensuring direct interfacing with legacy 5 V TTL logic families. Output drive capability is specified at ±4 mA, supporting standard CMOS/TTL fan-out loads under recommended operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5 V TTL systems and stable operation across industrial voltage tolerances. |
| Propagation Delay (nI0/nI1 → nY) | 13 ns (typ) at VCC = 4.5 V, CL = 50 pF - Enables reliable high-speed data selection in synchronous digital systems up to ~30 MHz. |
| Input Thresholds (VIH/VIL) | 2.0 V / 0.8 V at VCC = 5 V - Guarantees noise-immune recognition of standard TTL logic levels without level-shifting. |
| Output Drive (IOH/IOL) | -4 mA / +4 mA - Supports direct connection to multiple 74-series inputs or small capacitive loads (<50 pF) without buffering. |
| Operating Temperature | -40 °C to +125 °C - Validated for use in under-hood automotive modules, industrial PLCs, and extended-temperature embedded controllers. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Reduces risk of field failure during handling and board assembly in non-ESD-controlled environments. |
| Power Dissipation Capacitance | 70 pF - Used to calculate dynamic power (PD = CPD × VCC² × fi × N), critical for thermal budgeting in dense logic designs. |
Pinout & Package
74HCT157DB,118 is supplied in a plastic small outline package (SO16) per SOT109-1, with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or index area at the top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S (Select) | Common control input: LOW selects I0 sources, HIGH selects I1 sources across all four channels. |
| 2, 5, 11, 14 | 1I0, 2I0, 3I0, 4I0 | Data inputs from source 0 - routed to respective Y outputs when S = LOW. |
| 3, 6, 10, 13 | 1I1, 2I1, 3I1, 4I1 | Data inputs from source 1 - routed to respective Y outputs when S = HIGH. |
| 4, 7, 9, 12 | 1Y, 2Y, 3Y, 4Y | Non-inverting multiplexer outputs - reflect selected I0 or I1 input with no polarity inversion. |
| 8 | GND | Ground reference (0 V) - required for proper biasing and noise rejection of all internal circuitry. |
| 15 | E (Enable) | Active-HIGH override: forces all Y outputs LOW regardless of S or input states - enables global output disable. |
| 16 | VCC | Positive supply rail (4.5–5.5 V) - powers internal CMOS logic and defines logic threshold references. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V, VIL = 0.8 V at VCC = 5 V - eliminates need for external level translators when interfacing with 74LS/74F families. |
| Quad 2:1 multiplexing with shared controls | Single S and E lines manage four independent data paths - reduces PCB routing complexity and control pin count. |
| Wide temperature range | Specified from -40 °C to +125 °C - supports deployment in engine control units, motor drives, and outdoor industrial equipment. |
| Clamp diodes on all inputs | Enables safe interface to voltages exceeding VCC using current-limiting resistors - simplifies mixed-voltage system design. |
| Low dynamic power consumption | CPD = 70 pF - limits switching power dissipation in high-frequency applications, easing thermal management. |
Applications
| Industrial PLC I/O Expansion | Microcontroller Peripheral Multiplexing |
|---|---|
|
Use Scenario: Expanding limited GPIO count on an ARM Cortex-M4 MCU to drive eight discrete sensors via time-shared ADC sampling. IC Role / Device Role / Timing Role: Routes sensor analog switch control signals and status feedback lines between MCU pins and external MUX arrays under firmware timing control. Use Value: Enables deterministic 4-channel signal selection with <15 ns propagation delay, preserving timing margins in real-time control loops. |
Use Scenario: Sharing a single UART TX/RX pair among four RS-232 transceivers in a modular communication backplane. IC Role / Device Role / Timing Role: Selects active transceiver channel via S/E control synchronized to packet framing - acts as digital signal router. Use Value: Eliminates need for four separate UART peripherals while maintaining full-duplex capability and avoiding bus contention. |
| Automotive Body Control Module | Test Equipment Signal Routing |
|
Use Scenario: Consolidating diagnostic LED driver enable signals and switch input reads across four door modules into a central BCM microcontroller. IC Role / Device Role / Timing Role: Performs parallel data aggregation and selective forwarding - functions as a digital bus selector in safety-critical subsystems. Use Value: Meets AEC-Q100 stress requirements via -40 °C to +125 °C qualification and latch-up immunity >100 mA. |
Use Scenario: Configuring automated test fixtures to route stimulus signals from one of two pattern generators to eight DUT inputs. IC Role / Device Role / Timing Role: Provides repeatable, low-jitter signal path selection under GPIB or USB command - serves as programmable signal switch matrix element. Use Value: Delivers sub-20 ns channel-to-channel skew and HBM >2000 V ESD tolerance, ensuring measurement repeatability and fixture longevity. |
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 |
|---|---|---|---|
| 74HCT157D,653 | Same die, identical electrical specs, but in SO16 package with different reel packaging (1000 pcs vs. 2500 pcs) and traceability coding. | No functional difference - suitable for identical applications including industrial control and bus switching. | Select when requiring standard distribution packaging or specific logistics labeling per OEM procurement policy. |
| SN74HCT157DR | Texas Instruments variant: VIH/VIL tighter (2.0 V/0.8 V same), but tpd slightly higher (16 ns typ @ 5 V), and rated only to +85 °C ambient. | Limited to commercial/industrial environments without extended temperature demands; not qualified for 125 °C operation. | Choose only if TI supply chain alignment is mandatory and thermal margin allows operation below +85 °C ambient. |
Compared with 74HCT157DB,118, the 74HCT157D,653 offers identical performance in a functionally interchangeable package, while SN74HCT157DR trades extended temperature support for TI-specific supply chain access and slightly relaxed speed.
Availability
74HCT157DB,118 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT157DB,118 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
Nexperia is a leading semiconductor manufacturer specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer applications.
The 74HCT157DB,118 belongs to Nexperia's 74HCT logic family, engineered for seamless integration with legacy TTL systems while delivering CMOS power efficiency and robust industrial-grade reliability.
FAQ
What is the maximum clock frequency supported by the 74HCT157DB,118?
The 74HCT157DB,118 does not operate on a clock signal-it is combinational logic with propagation delay as the key timing parameter. With tpd = 13 ns (typ) at VCC = 4.5 V and CL = 50 pF, it supports reliable data selection in systems where input setup/hold times exceed 15 ns, enabling effective use in 30 MHz synchronous buses with appropriate timing margins.
Can the 74HCT157DB,118 interface directly with 3.3 V microcontrollers?
No-its TTL-compatible inputs require VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 5 V, but it is not 3.3 V tolerant. Driving it from a 3.3 V MCU output risks marginal VIH recognition and increased static power due to partial turn-on of input stages. A level shifter or 5 V buffer is required for reliable interfacing.
Is the 74HCT157DB,118 pin-compatible with the 74HC157 series?
Yes-both share identical pinout (SOT109-1 SO16), logic function, and terminal assignments. However, the 74HC157 uses CMOS-level inputs (VIH = 3.15 V at VCC = 4.5 V), making it incompatible with TTL sources without level translation, whereas the 74HCT157DB,118 is designed specifically for TTL interoperability.
Does the 74HCT157DB,118 support hot-swap or live-insertion?
No-this device lacks hot-swap protection circuitry such as power-on reset, slew-rate controlled I/Os, or undervoltage lockout. Applying VCC while inputs are driven can cause latch-up or excessive ICC due to internal parasitic SCR conduction. Power sequencing must follow GND → VCC → inputs to ensure safe operation.
74HCT157DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 4mA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT157DB,118 FAQ
1.How can I place an order for 74HCT157DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT157DB,118 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 74HCT157DB,118 reliable?
The price and inventory of 74HCT157DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT157DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT157DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT157DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT157DB,118?
74HCT157DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT157DB,118 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 74HCT157DB,118?
For technical support, including 74HCT157DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT157DB,118 requirements.
6.How does Aetrix verify that 74HCT157DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT157DB,118 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 74HCT157DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT157DB,118?
All 74HCT157DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT157DB,118, 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 74HCT157DB,118 part is unused and in its original packaging.
Return procedure for 74HCT157DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT157DB,118 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
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SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
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SN74CB3Q3245PWR
Texas Instruments
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SN74CB3Q3257RGYR
Texas Instruments
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TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
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SN74HC138N
Texas Instruments
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