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NXP Semiconductors 74LVCH322245AEC:55
- Part No.:
- 74LVCH322245AEC:55
- Manufacturer:
- NXP Semiconductors
- Package:
- 96-LFBGA
- Datasheet:
-
74LVCH322245AEC:55.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 96LFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,186
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Product details
Overview
74LVCH322245AEC from NXP Semiconductors is a 32-bit non-inverting 3-state bus transceiver with integrated 30 Ω series termination resistors, four independent direction (nDIR) and output enable (nOE) controls, and 5 V-tolerant I/O for mixed-voltage interfacing between 1.2 V–3.6 V and 5 V systems. It supports bidirectional data flow across four 8-bit channels in high-speed digital backplanes and memory expansion interfaces.
For engineers reviewing the 74LVCH322245AEC datasheet, 74LVCH322245AEC pinout, 74LVCH322245AEC application, or 74LVCH322245AEC equivalent, key selection criteria include its LFBGA96 package, −40 °C to +85 °C industrial temperature range, bus hold on all data inputs, 3.3 ns typical propagation delay at 3.3 V, and compliance with JEDEC JESD8-B/JESD36 standards.
Technical Context
This transceiver implements four independent 8-bit bidirectional channels, each with dedicated nDIR (active-HIGH direction control) and nOE (active-LOW output enable) pins enabling granular bus isolation and cascading. Each channel features non-inverting logic and 30 Ω series termination in both HIGH and LOW output stages to suppress transmission line reflections and reduce ground bounce.
All 32 I/O pins support 5 V tolerance up to 5.5 V when disabled, and include bus hold circuitry eliminating external pull-up resistors on unused inputs. The device operates across 1.2 V–3.6 V supply voltage while maintaining TTL-level compatibility and ESD robustness exceeding 2000 V HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - enables operation in ultra-low-voltage microcontroller domains and standard 3.3 V logic systems |
| I/O Voltage Tolerance | Up to 5.5 V - allows safe connection to legacy 5 V buses without level shifters |
| Propagation Delay (tpd) | 3.3 ns typical at VCC = 3.3 V - supports >150 MHz data rates in point-to-point or stubbed bus topologies |
| Output Termination | 30 Ω series resistor per I/O - reduces signal overshoot/ringing and simplifies PCB layout by eliminating discrete termination components |
| Bus Hold Current | ±75 µA at VI = 0.8 V / 2.0 V - actively maintains valid logic states on floating inputs without external biasing |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded control and communications equipment |
| ESD Protection | 2000 V HBM, 200 V MM - meets stringent handling and system-level immunity requirements |
| Compliance | JEDEC JESD8-B / JESD36 - ensures interoperability with industry-standard low-voltage CMOS logic families |
Pinout & Package
74LVCH322245AEC is housed in a plastic low-profile fine-pitch ball grid array (LFBGA96) package measuring 13.5 mm × 5.5 mm × 1.05 mm with 96 solder balls arranged in a 12 × 8 grid (SOT536-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A[0:7], 2A[0:7], 3A[0:7], 4A[0:7] | Data port A side (channel 1–4) | 8-bit bidirectional I/O group per channel; connects to local bus or controller-side signals |
| 1B[0:7], 2B[0:7], 3B[0:7], 4B[0:7] | Data port B side (channel 1–4) | 8-bit bidirectional I/O group per channel; connects to peripheral or memory-side signals |
| 1DIR–4DIR | Direction control input (active HIGH) | Determines data flow direction per channel: HIGH = A→B, LOW = B→A |
| 1OE–4OE | Output enable input (active LOW) | Places corresponding A/B ports in high-impedance state when HIGH; enables isolation during bus arbitration |
| VCC | Power supply | Single 1.2–3.6 V supply; 8 dedicated balls minimize IR drop and noise coupling |
| GND | Ground reference | 16 ground balls distributed across package for low-inductance return paths and reduced ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| MULTIBYTE flow-through pinout | Standardized A/B port alignment across all four channels simplifies routing and reduces layer count in dense PCB layouts |
| Integrated 30 Ω series termination | Eliminates need for 32 discrete surface-mount resistors, reducing BOM cost and board area while improving signal integrity |
| Bus hold on all data inputs | Prevents undefined logic states on unconnected or unterminated inputs-no external pull-ups required for idle lines |
| 5 V tolerant I/O with 3.3 V core | Enables direct interface between modern low-voltage SoCs/FPGAs and legacy 5 V peripherals without level-shifting circuitry |
| Low-inductance power/ground pinning | Multiple VCC and GND balls placed adjacent to I/O banks suppress simultaneous switching noise and improve EMC performance |
| JEDEC JESD8-B/JESD36 compliance | Guarantees interoperability with other LVCMOS/LVTTL devices in mixed-supply systems and ensures predictable timing behavior |
Applications
| Memory Expansion Interface | Industrial Backplane Interconnect |
|---|---|
Use Scenario: Expanding address/data bus width between an ARM Cortex-M7 MCU and external SRAM or Flash memory. IC Role / Device Role / Timing Role: Bidirectional 32-bit transceiver buffering and isolating memory bus segments with precise direction and enable control per 8-bit lane. Use Value: Integrated 30 Ω termination eliminates reflection-induced setup/hold violations at 100+ MHz clock rates; bus hold prevents latch-up on unpopulated memory slots. | Use Scenario: Interfacing multiple FPGA-based I/O modules to a central controller over a shared 32-bit parallel backplane. IC Role / Device Role / Timing Role: Isolating and translating signals between 3.3 V FPGA I/O banks and 5 V legacy sensor/actuator cards via per-channel nOE/nDIR control. Use Value: 5.5 V-tolerant outputs allow hot-swap insertion of 5 V cards without damaging 3.3 V controller; LFBGA96 footprint supports high-density module stacking. |
| Automotive Diagnostic Bus Bridge | Test Equipment Signal Conditioning |
Use Scenario: Bridging UART or CAN controller GPIOs to a 32-bit diagnostic test port in vehicle ECUs requiring mixed-voltage signal translation. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled data transfer between 1.8 V/3.3 V microcontroller GPIOs and 5 V automotive diagnostic hardware. Use Value: −40 °C to +85 °C rating ensures reliability under hood conditions; bus hold maintains defined states during intermittent cable disconnects. | Use Scenario: Conditioning high-speed digital stimulus/response signals in automated test equipment (ATE) where impedance matching and noise suppression are critical. IC Role / Device Role / Timing Role: Driving terminated transmission lines to oscilloscope inputs or DUT interfaces with minimal edge distortion and crosstalk. Use Value: Matched 30 Ω output resistance reduces ringing on 50 Ω coaxial traces; low skew (<1.0 ns) preserves timing margins across all 32 bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32-bit bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC32245PAG | Same 32-bit architecture, but uses TSSOP-100 package (24.0 × 10.0 mm); no integrated 30 Ω termination resistors | Requires external series termination for signal integrity; better suited for prototyping or low-volume manual assembly | Select when board space permits larger package and discrete termination is acceptable for cost or tuning flexibility |
| 74ALVCH32244AEC | Inverting transceiver (vs. non-inverting); identical LFBGA96 package, 30 Ω termination, and 5 V tolerance | Requires logic inversion in upstream/downstream logic; unsuitable where signal polarity must be preserved end-to-end | Select only if system-level design accommodates inverted data path; otherwise avoid due to functional mismatch |
Compared with SN74LVC32245PAG and 74ALVCH32244AEC, the 74LVCH322245AEC uniquely combines non-inverting operation, integrated 30 Ω termination, and LFBGA96 packaging-enabling compact, high-signal-integrity 32-bit bus extensions without external components or polarity inversion.
Availability
74LVCH322245AEC is available at Aetrix Electronics and suitable for industrial backplane interconnect, automotive diagnostic bus bridging, and memory expansion interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for 74LVCH322245AEC 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 74LVCH322245AEC belongs to NXP's LVCH logic family, designed specifically for high-speed, low-power, mixed-voltage bus interfacing in space-constrained industrial and automotive control systems.
FAQ
What is the maximum operating supply voltage for the 74LVCH322245AEC?
The 74LVCH322245AEC has a recommended operating supply voltage range of 1.2 V to 3.6 V. Its absolute maximum supply voltage is +6.5 V, but operation above 3.6 V violates recommended conditions and risks parametric degradation or reliability failure. All static and dynamic specifications-including propagation delay, drive strength, and bus hold functionality-are guaranteed only within the 1.2 V–3.6 V range specified in Table 5 of the NXP datasheet.
Does the 74LVCH322245AEC support true 5 V logic interfacing?
Yes, the 74LVCH322245AEC supports true 5 V logic interfacing: all I/O pins tolerate up to 5.5 V regardless of VCC level, and inputs accept TTL-compatible thresholds. When VCC = 3.3 V, VOH remains ≥ VCC − 0.2 V and VOL ≤ 0.2 V at −100 µA load, ensuring robust noise margins against 5 V drivers. This allows direct connection to 5 V peripherals without external level shifters-critical for legacy system upgrades.
How does the bus hold feature work on the 74LVCH322245AEC?
The 74LVCH322245AEC includes bus hold circuitry on all 32 data input pins (A[0:7]/B[0:7] groups), providing ±75 µA active current to maintain the last-valid logic state when inputs float. It activates automatically when VI < 0.8 V (LOW hold) or VI > 2.0 V (HIGH hold) and disables when VI exceeds VCC, allowing safe 5.5 V input application. This eliminates external pull-up/pull-down resistors in unconnected or intermittently driven bus segments.
Can the 74LVCH322245AEC be used in hot-swap applications?
Yes-the 74LVCH322245AEC supports hot-swap operation: its 5.5 V-tolerant outputs remain undamaged when VCC is 0 V, and power-off leakage current is limited to ±10 µA. To ensure high-impedance state during power-up, tie each nOE pin to VCC via a pull-up resistor (value determined by driver sink capability). This prevents bus contention during partial power sequencing in modular backplane systems.
What is the purpose of the 30 Ω series termination resistors in the 74LVCH322245AEC?
The 30 Ω series termination resistors in the 74LVCH322245AEC are integrated into both HIGH and LOW output stages to match typical PCB trace impedances (40–75 Ω) and suppress signal reflections. They reduce overshoot, undershoot, and ringing on fast-switching 32-bit buses-enabling reliable operation at >150 MHz without discrete termination components. This improves signal integrity, lowers EMI, and simplifies layout in high-density digital systems.
74LVCH322245AEC:55 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVCH
- Package/Case:
- 96-LFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 96-LFBGA (13.5x5.5)
74LVCH322245AEC:55 FAQ
1.How can I place an order for 74LVCH322245AEC:55 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH322245AEC:55 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 74LVCH322245AEC:55 reliable?
The price and inventory of 74LVCH322245AEC:55 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH322245AEC:55 is usually 5 days.
3.What payment methods are accepted for 74LVCH322245AEC:55?
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4.How is shipping managed for 74LVCH322245AEC:55?
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Once your 74LVCH322245AEC:55 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 74LVCH322245AEC:55?
For technical support, including 74LVCH322245AEC:55 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH322245AEC:55 requirements.
6.How does Aetrix verify that 74LVCH322245AEC:55 is sourced from the original manufacturer or authorized distributors?
All 74LVCH322245AEC:55 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 74LVCH322245AEC:55 meets industry standards.
7.What is the process for return or replacement of 74LVCH322245AEC:55?
All 74LVCH322245AEC:55 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH322245AEC:55, 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 74LVCH322245AEC:55 part is unused and in its original packaging.
Return procedure for 74LVCH322245AEC:55:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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