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NXP Semiconductors 74LVC623ADB,112
- Part No.:
- 74LVC623ADB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVC623ADB,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,282
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Product details
Overview
74LVC623ADB,112 from NXP Semiconductors is an octal non-inverting 3-state bus transceiver with dual active-low enable inputs (OEAB and OEBA), supporting bidirectional asynchronous data flow between two 8-bit buses. It operates from 1.2 V to 3.6 V supply, tolerates 5.5 V on outputs when disabled, and functions across −40 °C to +125 °C - enabling use in industrial control backplanes and mixed-voltage memory interfaces.
For engineers reviewing the 74LVC623ADB,112 datasheet, 74LVC623ADB,112 pinout, 74LVC623ADB,112 application, or 74LVC623ADB,112 equivalent, key selection considerations include dual-enable bus isolation timing, 5 V-tolerant I/O for 3.3 V/5 V level translation, propagation delay down to 1.0 ns at 3.3 V, and SSOP20 package compatibility with high-density PCB layouts.
Technical Context
The 74LVC623ADB,112 implements a dual-control logic architecture where OEAB enables A→B transmission and OEBA enables B→A transmission; simultaneous assertion of both enables transparent latching mode, holding bus states at high-impedance isolation. Its CMOS design ensures low static current (≤40 µA at 3.6 V) and supports JEDEC-compliant voltage ranges including JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V).
Dynamic performance is characterized by sub-7 ns propagation delay (tpd) and ≤8.5 ns enable/disable times across full temperature and voltage range; input/output capacitance is specified at 4.0 pF (CI) and 10.0 pF (CI/O), minimizing signal integrity impact in high-speed parallel bus applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.2 V to 3.6 V - enables operation in ultra-low-power and standard 1.8 V/2.5 V/3.3 V systems. |
| Input Voltage Range | 0 V to 5.5 V - allows direct interfacing with 5 V TTL/CMOS sources without level shifters. |
| Propagation Delay | 1.0 ns (min) to 6.5 ns (max) at VCC = 3.0–3.6 V - supports >150 MHz bus toggle rates in synchronous designs. |
| Output Drive Strength | ±24 mA at 3.0 V - sufficient to drive 50 Ω transmission lines or multiple LVC loads under worst-case conditions. |
| Operating Temperature | −40 °C to +125 °C - qualified for extended industrial and under-hood automotive auxiliary subsystems. |
| ESD Protection | HBM >2000 V, MM >200 V, CDM >1000 V - meets IEC 61000-4-2 system-level robustness requirements. |
| Power Dissipation Cap | 500 mW at Tamb ≤60 °C (SSOP20) - defines thermal derating slope of 5.5 mW/K above 60 °C. |
Pinout & Package
74LVC623ADB,112 uses the SSOP20 (SOT339-1) package: plastic shrink small outline, 20 leads, 5.3 mm body width, 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OEAB | Active-low output enable for A→B direction; controls all Bn outputs simultaneously. |
| 19 | OEBA | Active-low output enable for B→A direction; controls all An outputs simultaneously. |
| 2–9 | A[0:7] | Bidirectional data terminals for bus A; function as inputs or outputs depending on OEBA state. |
| 11–18 | B[0:7] | Bidirectional data terminals for bus B; function as inputs or outputs depending on OEAB state. |
| 10 | GND | Ground reference (0 V) for all internal circuitry and I/O switching thresholds. |
| 20 | VCC | Primary power supply input; must be decoupled locally to maintain noise margin and switching stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | OEAB and OEBA allow asymmetric bus gating - e.g., isolate A bus while transmitting B→A, critical for fault-containment in redundant systems. |
| 5 V-tolerant I/O | Inputs and outputs withstand up to 5.5 V regardless of VCC (1.2–3.6 V), enabling safe integration into legacy 5 V subsystems without external clamping. |
| Transparent latching mode | Simultaneous OEAB=LOW and OEBA=LOW causes bidirectional feedback that holds last valid bus states - eliminates need for external latch in hold-mode applications. |
| Wide temperature operation | Specified from −40 °C to +125 °C with full parametric validation - supports deployment in industrial PLCs and motor drives without derating. |
| Low dynamic power | CPD ≤18.8 pF at 3.3 V enables <1 mW dynamic power per 10 MHz toggle on 8-bit bus - reduces thermal load in dense logic arrays. |
Applications
| Industrial Backplane Interface | Memory Subsystem Translation |
|---|---|
|
Use Scenario: Interfacing a 3.3 V microcontroller bus to a legacy 5 V peripheral controller in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, using OEAB/OEBA to sequence data transfers and prevent contention during reset. Use Value: Eliminates discrete level-shifter ICs and pull-up networks, reducing BOM count and layout area while maintaining JEDEC-compliant timing margins. |
Use Scenario: Connecting a 1.8 V FPGA configuration interface to a 3.3 V parallel EEPROM during boot-time firmware loading. IC Role / Device Role / Timing Role: Octal transceiver providing controlled directionality and 5 V-tolerant inputs to safely sample EEPROM data without overvoltage risk. Use Value: Enables single-chip translation across three voltage domains (1.8 V core, 3.3 V I/O, 5 V EEPROM VCC), avoiding timing skew from cascaded buffers. |
| Automotive Body Control Module | Test Equipment Bus Arbitration |
|
Use Scenario: Isolating diagnostic CAN controller bus from main MCU bus during ECU reprogramming sequences. IC Role / Device Role / Timing Role: High-reliability bus gate with fast disable time (≤7.0 ns at 3.3 V) to enforce strict bus separation during flash update windows. Use Value: Prevents spurious CAN frame corruption during firmware upload by guaranteeing sub-10 ns bus isolation - meeting ISO 14229-1 UDS timing constraints. |
Use Scenario: Sharing a single 8-bit test access port among multiple DUTs in automated functional test fixtures. IC Role / Device Role / Timing Role: Direction-controlled multiplexer enabling one DUT to drive the TAP while others remain in high-Z, managed via synchronized OEAB/OEBA strobes. Use Value: Reduces fixture complexity by replacing mechanical relays or multi-chip logic with a single SSOP20 device, improving test repeatability and cycle time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC823APWR | TI part with identical pinout and electrical specs but different enable polarity (OEAB/OEBA active HIGH); requires inverted control logic. | Requires PCB-level redesign of enable signal routing and may conflict with existing firmware GPIO configurations. | Select only if existing system already uses TI's active-HIGH enable convention and board revision is feasible. |
| 74ALVC162245DGGR | 16-bit variant in TSSOP48; higher channel count, wider supply (1.65–3.6 V), but no dual-enable latching mode. | Cannot replicate transparent latching behavior; unsuitable for hold-mode bus retention without external logic. | Choose for higher bandwidth parallel paths where latching is unnecessary and space permits larger package. |
Compared with SN74LVC823APWR and 74ALVC162245DGGR, the 74LVC623ADB,112 uniquely delivers dual active-LOW enables with verified latching behavior in a compact SSOP20 footprint - making it optimal for space-constrained industrial controllers requiring deterministic bus state retention.
Availability
74LVC623ADB,112 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 74LVC623ADB,112 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LVC623ADB,112 belongs to NXP's LVC logic family, designed specifically for low-voltage, high-speed bidirectional bus interfacing in mixed-signal systems where voltage translation, timing predictability, and thermal resilience are critical.
FAQ
What is the maximum supply voltage rating for 74LVC623ADB,112?
The absolute maximum supply voltage (VCC) for 74LVC623ADB,112 is +6.5 V, but recommended operation is limited to 1.2 V to 3.6 V. Exceeding 3.6 V risks violating JEDEC compliance and may cause accelerated aging or parametric shift. The 74LVC623ADB,112 must not be operated continuously above 3.6 V even if within absolute maximum limits.
Can 74LVC623ADB,112 interface directly with 5 V TTL logic?
Yes - the 74LVC623ADB,112 features 5 V-tolerant inputs and outputs, allowing direct connection to 5 V TTL devices while powered from 1.2 V to 3.6 V. When disabled, outputs tolerate up to 5.5 V, eliminating external clamping diodes. This capability is validated across −40 °C to +125 °C per NXP's datasheet Table 4 and Table 5.
How does the dual-enable latching mode work in 74LVC623ADB,112?
When both OEAB and OEBA are driven LOW, the 74LVC623ADB,112 enters transparent latching mode: each An terminal reinforces its corresponding Bn terminal and vice versa, creating a closed-loop feedback path. With all external drivers in high-impedance, both buses retain their last valid logic states - a feature confirmed in the functional table (Table 3) and Figure 3 of the NXP datasheet.
What is the thermal derating behavior of 74LVC623ADB,112 in SSOP20 package?
For the SSOP20 (SOT339-1) package used by 74LVC623ADB,112, total power dissipation (Ptot) derates linearly at 5.5 mW/K above +60 °C ambient. At +125 °C, maximum allowable Ptot drops to approximately 143 mW. This derating is defined in Table 4 (Limiting Values) and applies regardless of voltage or load conditions.
Is 74LVC623ADB,112 qualified for automotive applications?
No - the 74LVC623ADB,112 is specified for industrial temperature range (−40 °C to +125 °C) but is not AEC-Q100 qualified. NXP explicitly states in Section 15.3 that non-automotive qualified products like 74LVC623ADB,112 are "not suitable for automotive use" unless separately validated by the customer. Use in automotive systems requires full qualification testing per customer requirements.
74LVC623ADB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74LVC623ADB,112 FAQ
1.How can I place an order for 74LVC623ADB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC623ADB,112 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 74LVC623ADB,112 reliable?
The price and inventory of 74LVC623ADB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC623ADB,112 is usually 5 days.
3.What payment methods are accepted for 74LVC623ADB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC623ADB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC623ADB,112?
74LVC623ADB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC623ADB,112 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 74LVC623ADB,112?
For technical support, including 74LVC623ADB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC623ADB,112 requirements.
6.How does Aetrix verify that 74LVC623ADB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC623ADB,112 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 74LVC623ADB,112 meets industry standards.
7.What is the process for return or replacement of 74LVC623ADB,112?
All 74LVC623ADB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC623ADB,112, 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 74LVC623ADB,112 part is unused and in its original packaging.
Return procedure for 74LVC623ADB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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