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NXP Semiconductors 74HC245N,652
- Part No.:
- 74HC245N,652
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC245N,652.pdf
- Description:
- IC TXRX NON-INVERT 6V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,740
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Product details
Overview
74HC245N,652 from Nexperia is an 8-bit non-inverting octal bus transceiver with 3-state outputs, designed for bidirectional data flow control between two 8-bit buses. It features direction control (DIR) and active-low output enable (OE), operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers propagation delay as low as 7 ns at VCC = 6.0 V - enabling use in high-speed digital interconnects such as microcontroller peripheral expansion and memory address/data bus isolation.
For engineers reviewing the 74HC245N,652 datasheet, 74HC245N,652 pinout, 74HC245N,652 application, or 74HC245N,652 equivalent, this page provides verified functional identity, SO20 package mapping, confirmed 20-pin terminal roles, JEDEC-compliant static/dynamic specifications, and validated alternatives for industrial bus interface design.
Technical Context
The 74HC245N,652 implements CMOS logic with input clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Its DIR input selects data flow direction (A→B or B→A), while OE controls 3-state output impedance - a LOW on OE enables transmission, HIGH forces all outputs into high-impedance OFF-state.
It complies with JESD7A (2.0 V–6.0 V) and JESD8C (2.7 V–3.6 V) standards, exhibits latch-up immunity >100 mA per JESD78 Class II Level B, and meets HBM ESD rating >2000 V and CDM >1000 V - confirming suitability for robust industrial board-level signal routing where voltage translation and bus contention prevention are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Propagation Delay (tpd) | 7 ns (typ) at VCC = 6.0 V - enables reliable operation in systems with clock rates up to ~70 MHz bus timing budgets. |
| Output Enable/Disable Time | 9 ns (ten) / 12 ns (tdis) at VCC = 6.0 V - ensures fast bus arbitration and clean state transitions during dynamic bus sharing. |
| Input Voltage Thresholds | VIH = 4.2 V, VIL = 1.8 V at VCC = 6.0 V - provides 1.2 V noise margin for TTL-compatible 5 V systems. |
| Static Power Dissipation | ICC ≤ 160 μA at VCC = 6.0 V, -40 °C to +125 °C - enables low-quiescent-power operation in always-on industrial controllers. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive ECUs, industrial PLC I/O modules, and outdoor telecom equipment. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - reduces risk of field failure during handling and board assembly in uncontrolled environments. |
Pinout & Package
74HC245N,652 is supplied in the SO20 (SOT163-1) plastic small outline package: 20-lead, 7.5 mm body width, 1.27 mm lead pitch, standard JEDEC MS-013 footprint compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW = A→B data flow; HIGH = B→A - determines bus master/slave role dynamically during operation. |
| 2–9 (A0–A7) | Port A data I/O | 8-bit bidirectional bus segment connected to primary controller or memory side. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance for noise immunity. |
| 11–18 (B0–B7) | Port B data I/O | 8-bit bidirectional bus segment connected to peripheral, memory, or secondary controller side. |
| 19 (OE) | Active-low output enable | LOW = outputs enabled; HIGH = all outputs high-impedance - essential for bus sharing and hot-swap isolation. |
| 20 (VCC) | Positive supply | 2.0–6.0 V power rail; decoupling capacitor (100 nF) required within 10 mm of pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Enables full 8-bit parallel data exchange between two independent bus domains using single-direction control logic. |
| Non-inverting 3-state outputs | Preserves signal polarity during transfer and eliminates bus contention by disabling outputs when OE is HIGH. |
| Input clamp diodes | Allows safe connection to signals exceeding VCC (e.g., 12 V sensor lines) when series current-limiting resistors are used. |
| Wide temperature qualification | Rated for continuous operation from -40 °C to +125 °C - suitable for engine control units and industrial motor drives. |
| JEDEC-compliant static/dynamic specs | Meets JESD7A/JESD8C voltage standards and JESD78 latch-up requirements - simplifies compliance validation for safety-critical designs. |
Applications
| Microcontroller Peripheral Expansion | Memory Address/Data Bus Isolation |
|---|---|
|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive multiple SPI peripherals and parallel LCD interfaces. IC Role / Device Role / Timing Role: Bidirectional data bridge between MCU's native 8-bit data port and external peripheral bus, controlled via GPIO-driven DIR and OE. Use Value: Eliminates need for discrete logic or FPGA glue logic; 7 ns tpd ensures no timing penalty in 50 MHz APB2 bus transfers. |
Use Scenario: Isolating SRAM address/data lines from a shared system bus in a real-time motion controller. IC Role / Device Role / Timing Role: 3-state buffer preventing bus contention during DMA bursts and CPU access cycles. Use Value: Enables deterministic bus arbitration with <12 ns disable time - critical for sub-μs interrupt latency requirements. |
| Industrial I/O Module Backplane Interface | Legacy ISA Bus Signal Translation |
|
Use Scenario: Interfacing 3.3 V FPGA-based I/O cards to a 5 V backplane in modular PLC chassis. IC Role / Device Role / Timing Role: Level-tolerant bidirectional transceiver translating between mixed-voltage subsystems without external level shifters. Use Value: Input clamp diodes allow direct 5 V tolerant inputs at 3.3 V VCC - reducing component count and board area by 30% vs. discrete solutions. |
Use Scenario: Replacing obsolete 74LS245 in retro-computing hardware restoration projects requiring ISA bus compatibility. IC Role / Device Role / Timing Role: Pin-compatible CMOS upgrade delivering lower power and higher noise immunity than original TTL part. Use Value: 160 μA max ICC at 125 °C cuts thermal load by >90% vs. LS family - enabling fanless enclosure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT245D,652 | CMOS input thresholds replaced with TTL-compatible VIH/VIL (2.0 V/0.8 V at VCC = 5 V); identical pinout and timing. | Required when driving from legacy 5 V TTL sources with marginal noise margins. | Select when interfacing to older 74LS/74ALS logic families where HC thresholds cause unreliable recognition of HIGH levels. |
| SN74LVC245APWR | 3.3 V only (1.65–3.6 V), lower VCC min, 3.5 ns tpd at 3.3 V, different pinout (TSSOP20), no input clamps. | Suitable for modern low-voltage embedded systems but not for mixed-voltage or overvoltage-safe designs. | Choose for new 3.3 V-only designs prioritizing speed and density; avoid if VCC > 3.6 V or overvoltage protection is needed. |
Compared with 74HC245N,652, the 74HCT245D,652 offers guaranteed TTL input compatibility at 5 V while retaining identical bus interface functionality, whereas SN74LVC245APWR delivers faster performance in 3.3 V systems but sacrifices voltage flexibility and overvoltage resilience.
Availability
74HC245N,652 is available at Aetrix Electronics and suitable for industrial I/O modules, automotive ECU backplanes, and legacy bus interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC245N,652 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 high-volume, high-reliability logic, analog, and MOSFET components for automotive, industrial, and consumer applications.
The 74HC245N,652 belongs to Nexperia's industry-standard 74HC logic family, engineered for robust, low-power, wide-supply-voltage digital interfacing in harsh environments where reliability and longevity are critical.
FAQ
What is the maximum supply voltage for 74HC245N,652?
The absolute maximum supply voltage for 74HC245N,652 is +7.0 V, but the recommended operating range is 2.0 V to 6.0 V per Nexperia's Product Data Sheet Rev. 9. Operation above 6.0 V risks permanent damage and violates JEDEC JESD7A compliance - always limit VCC to ≤6.0 V in production designs using 74HC245N,652.
Does 74HC245N,652 support 3.3 V logic levels?
Yes, 74HC245N,652 fully supports 3.3 V operation: VIH = 2.31 V (min) and VIL = 0.99 V (max) at VCC = 3.3 V, providing 0.69 V noise margin for both HIGH and LOW states. Its CMOS inputs are compatible with standard 3.3 V LVTTL and LVCMOS drivers, making 74HC245N,652 ideal for mixed-voltage board designs.
Can 74HC245N,652 drive 5 V-tolerant inputs when powered at 3.3 V?
No - 74HC245N,652 outputs swing from GND to VCC, so at 3.3 V supply it delivers VOH ≈ 3.3 V (min 3.15 V), which may not meet the VIH requirement of many 5 V TTL or CMOS inputs (typically ≥3.5 V). Use 74HCT245 variants or level translators if driving 5 V receivers from a 3.3 V-powered 74HC245N,652.
What is the thermal resistance (RθJA) of the SO20 package for 74HC245N,652?
Nexperia does not publish RθJA for 74HC245N,652 in SO20 (SOT163-1) in the datasheet; however, the total power dissipation limit is 500 mW at Tamb ≤ 109 °C, derating linearly by 12.3 mW/K above that. For thermal design, assume RθJA ≈ 120 K/W typical for SO20 packages with minimal copper pour - verify with layout-specific simulation when ambient exceeds 85 °C in 74HC245N,652 applications.
Is 74HC245N,652 pin-compatible with 74LS245?
Yes - 74HC245N,652 uses the same SO20 (SOT163-1) footprint and identical 20-pin assignment as 74LS245, including DIR (pin 1), A0–A7 (pins 2–9), GND (pin 10), B0–B7 (pins 11–18), OE (pin 19), and VCC (pin 20). This allows direct drop-in replacement in legacy designs, though note that 74HC245N,652 draws significantly less supply current and has different input threshold behavior.
74HC245N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HC245N,652 FAQ
1.How can I place an order for 74HC245N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC245N,652 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 74HC245N,652 reliable?
The price and inventory of 74HC245N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC245N,652 is usually 5 days.
3.What payment methods are accepted for 74HC245N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC245N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC245N,652?
74HC245N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC245N,652 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 74HC245N,652?
For technical support, including 74HC245N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC245N,652 requirements.
6.How does Aetrix verify that 74HC245N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC245N,652 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 74HC245N,652 meets industry standards.
7.What is the process for return or replacement of 74HC245N,652?
All 74HC245N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC245N,652, 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 74HC245N,652 part is unused and in its original packaging.
Return procedure for 74HC245N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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