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NXP Semiconductors 74HCT241D,653
- Part No.:
- 74HCT241D,653
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HCT241D,653.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
74HCT241D,653 from Nexperia is an octal non-inverting 3-state buffer/line driver with dual independent output enables (1OE active LOW, 2OE active HIGH), operating from 4.5 V to 5.5 V, supporting TTL-level inputs and delivering ±6 mA output drive at VCC = 4.5 V, used in bidirectional bus interfacing and address/data isolation in industrial control backplanes.
For engineers reviewing the 74HCT241D,653 datasheet, 74HCT241D,653 pinout, 74HCT241D,653 application, or 74HCT241D,653 equivalent, key selection criteria include TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), 3-state timing (ten = 15 ns typ, tdis = 18 ns typ at VCC = 4.5 V), SO20 package thermal derating (12.3 mW/K above 109 °C), and −40 °C to +125 °C operation.
Technical Context
The 74HCT241D,653 implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated 3-state enable: 1OE (pin 1, active LOW) governs outputs 1Y0–1Y3 (pins 18,16,14,12), while 2OE (pin 19, active HIGH) controls 2Y0–2Y3 (pins 3,5,7,9). Input clamp diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used.
Its CMOS output stage provides rail-to-rail swing with VOH ≥ 3.98 V and VOL ≤ 0.26 V at IO = ±6 mA and VCC = 4.5 V, and static input leakage remains ≤ ±0.1 μA at 25 °C. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards and meets HBM ESD >2000 V per JS-001 Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL logic systems and stable operation across industrial voltage tolerances. |
| Input threshold (TTL) | VIH = 2.0 V min, VIL = 0.8 V max - guarantees reliable recognition of standard TTL output levels without level-shifting circuitry. |
| Output drive | ±6 mA at VCC = 4.5 V - supports direct connection to multiple 74-series inputs or moderate capacitive loads (<15 pF) without buffering. |
| Propagation delay | 13 ns typ (nAn → nYn, CL = 15 pF, VCC = 4.5 V) - enables use in sub-40 MHz synchronous bus applications with deterministic timing. |
| 3-state enable/disable | ten = 15 ns typ, tdis = 18 ns typ - allows fast bus arbitration and prevents output contention during state transitions. |
| Operating temperature | −40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O, and high-reliability embedded controllers. |
| Package | SO20 (SOT163-1), 7.5 mm body width - surface-mount compatible with standard reflow profiles and IPC-7351B land patterns. |
Pinout & Package
74HCT241D,653 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width, optimized for automated assembly and thermal dissipation up to 500 mW at Tj ≤ 109 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1OE) | Output enable 1 | Active-LOW control for outputs 1Y0–1Y3; asserts high-impedance state when HIGH, enabling bus sharing with other drivers. |
| 2 (1A0) | Data input group 1 | Non-inverting input for first 4-bit buffer section; electrically isolated from group 2 to prevent crosstalk in split-bus configurations. |
| 19 (2OE) | Output enable 2 | Active-HIGH control for outputs 2Y0–2Y3; simplifies interface with microcontroller GPIOs that default LOW at reset. |
| 3,5,7,9 (2Y0–2Y3) | Data outputs group 2 | Buffered, non-inverting outputs driven by 2A0–2A3; independently controllable from group 1 for dual-channel data routing. |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output currents; must be low-inductance connected to system ground plane. |
| 20 (VCC) | Power supply | 5 V nominal supply input; requires local 100 nF ceramic decoupling within 5 mm to suppress switching noise and ensure stable output transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | 1OE (active LOW) and 2OE (active HIGH) allow asymmetric control logic-e.g., one side synchronized to clock edge, the other to processor write strobe. |
| TTL-compatible input thresholds | VIH = 2.0 V min / VIL = 0.8 V max eliminates need for external level shifters when interfacing legacy 5 V TTL peripherals like 74LS devices. |
| Input clamp diodes | Enable safe overvoltage tolerance (VI > VCC) using series current-limiting resistors-critical for hot-swap I/O expansion cards and field-serviceable modules. |
| High noise immunity | Typical noise margin >1.2 V at VCC = 5 V ensures robust operation in electrically noisy environments such as motor drives and power supply monitoring circuits. |
| JESD7A/JESD8C compliance | Validated for 2.0–6.0 V and 2.7–3.6 V supply ranges-supports mixed-voltage system design and future-proofing for 3.3 V migration paths. |
Applications
| Industrial PLC Backplane Interface | Microcontroller Address Bus Isolation |
|---|---|
|
Use Scenario: Isolating CPU address lines from peripheral expansion slots in modular programmable logic controllers to prevent signal contention during module hot-insertion. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer with independent enables (1OE/2OE) acting as bidirectional address bus gate, synchronizing with slot-select strobes. Use Value: Enables deterministic bus arbitration with <18 ns disable time, preventing glitches during slot enumeration and supporting multi-master backplane protocols. |
Use Scenario: Separating 8-bit address lines from an 8051-based controller to external memory-mapped peripherals while maintaining signal integrity across 10 cm PCB traces. IC Role / Device Role / Timing Role: Octal line driver providing fan-out gain and impedance matching between MCU pins and high-capacitance peripheral buses. Use Value: Delivers 6 mA drive strength and 13 ns propagation delay to meet 20 MHz address setup/hold timing margins without added trace termination. |
| Legacy TTL System Voltage Translation | Test Equipment Signal Routing Matrix |
|
Use Scenario: Interfacing modern 5 V CMOS microcontrollers to legacy 74LS244-based instrumentation subsystems where input voltage thresholds differ. IC Role / Device Role / Timing Role: TTL-input buffer translating logic levels while preserving signal polarity and timing alignment across mixed-technology boundaries. Use Value: Eliminates external resistor-divider networks via native VIH/VIL compatibility, reducing BOM count and board area in retrofit designs. |
Use Scenario: Configuring flexible signal paths in automated test equipment where DUT signals must be routed to multiple measurement channels under software control. IC Role / Device Role / Timing Role: 3-state multiplexer element enabling dynamic reconfiguration of analog/digital signal chains without mechanical relays. Use Value: Achieves <20 ns enable/disable transitions and <0.3 V VOL to minimize insertion loss and maintain SNR in precision measurement front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT241N | Dual in-line package (PDIP-20); higher thermal resistance (θJA = 70 °C/W vs. SO20's 58 °C/W); identical electrical specs. | Suitable for prototyping and through-hole production; not recommended for high-density or thermally constrained PCBs. | Select when manual assembly, breadboarding, or legacy DIP footprint compatibility is required. |
| 74HCT241PW,118 | TSSOP20 package (SOT360-1); 4.4 mm body width; same pinout but 0.65 mm pitch; Ptot derates at 10.0 mW/K above 100 °C. | Better suited for space-constrained portable instruments and high-pin-count boards requiring fine-pitch routing. | Select when board area is critical and reflow capability supports 0.65 mm pitch components. |
Compared with SN74HCT241N and 74HCT241PW,118, the 74HCT241D,653 offers optimal thermal performance for industrial ambient conditions (12.3 mW/K derating above 109 °C) and proven reliability in wave-soldered SO20 assemblies, making it preferred for volume-manufactured control modules.
Availability
74HCT241D,653 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller address bus isolation, legacy TTL system interfacing, and automated test equipment signal routing requiring stable component supply across extended temperature ranges.
Supply support for 74HCT241D,653 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 global semiconductor expert focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, mobile, and computing markets.
The 74HCT241D,653 belongs to Nexperia's 74HCT logic family, engineered specifically for robust 5 V TTL-compatible interfacing in harsh environments-emphasizing wide temperature range, ESD resilience, and precise 3-state timing control.
FAQ
What is the maximum clock frequency supported by the 74HCT241D,653?
The 74HCT241D,653 does not operate on a clock; it is an asynchronous buffer. Its usable data rate is determined by propagation delay (13 ns typical) and transition time (5 ns typical), supporting reliable operation in systems with signal edges faster than ~40 MHz. For synchronous bus applications, timing margins must account for worst-case tpd + tdis + PCB trace delays.
Can 74HCT241D,653 drive a 50 pF load reliably?
Yes. At VCC = 4.5 V and CL = 50 pF, the datasheet confirms tpd ≤ 22 ns and tt ≤ 12 ns, with VOL ≤ 0.33 V and VOH ≥ 3.84 V under 6 mA load. Output drive capability remains within specification, though total power dissipation increases-ensure PCB layout includes adequate copper pour and decoupling for thermal stability.
Is there a pin-compatible 3.3 V version of this device?
No. The 74HCT241D,653 is strictly a 5 V TTL-compatible part. For 3.3 V systems, consider the 74LVC241A (3.3 V, LVTTL-compatible, same SO20 pinout) or 74ALVC241 (advanced low-voltage CMOS), both offering similar dual-enable architecture and 3-state behavior but with different input thresholds and drive strengths.
How does the input clamp diode affect external circuit design?
The integrated input clamp diodes allow safe biasing of inputs above VCC (e.g., 12 V sensor signals) when paired with a series current-limiting resistor (e.g., 10 kΩ for <1 mA clamping current). This eliminates external protection diodes, reduces component count, and simplifies interface design for industrial analog front-ends and digital I/O modules.
74HCT241D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HCT241D,653 FAQ
1.How can I place an order for 74HCT241D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT241D,653 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 74HCT241D,653 reliable?
The price and inventory of 74HCT241D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT241D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT241D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT241D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT241D,653?
74HCT241D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT241D,653 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 74HCT241D,653?
For technical support, including 74HCT241D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT241D,653 requirements.
6.How does Aetrix verify that 74HCT241D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT241D,653 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 74HCT241D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT241D,653?
All 74HCT241D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT241D,653, 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 74HCT241D,653 part is unused and in its original packaging.
Return procedure for 74HCT241D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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