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Texas Instruments 74LVCHR16245AZRDR
- Part No.:
- 74LVCHR16245AZRDR
- Manufacturer:
- Texas Instruments
- Package:
- 54-TFBGA
- Datasheet:
-
74LVCHR16245AZRDR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 54BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,802
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Product details
Overview
74LVCHR16245AZRDR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65-V to 3.6-V buses. It features 5.5-V tolerant inputs, 26-Ω integrated output series resistors, bus-hold on all data I/Os, and Ioff support for live insertion. Used in telecom infrastructure backplanes and industrial transport systems requiring mixed-voltage signal translation.
For engineers reviewing the 74LVCHR16245AZRDR datasheet, 74LVCHR16245AZRDR pinout, 74LVCHR16245AZRDR application, or 74LVCHR16245AZRDR equivalent, key selection criteria include its 4.8 ns max propagation delay at 3.3 V, ±12 mA output drive capability, -40°C to 125°C operating range, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The 74LVCHR16245AZRDR implements two independent 8-bit transceiver channels (A↔B), each controlled by dedicated DIR and OE pins. Direction control is level-sensitive: DIR = L enables B→A data flow; DIR = H enables A→B flow. Output enable is active-low; OE = L activates outputs, OE = H places both ports in high-impedance isolation.
All 32 I/O pins (16 A-side, 16 B-side) feature bus-hold circuitry eliminating external biasing, and tolerate input voltages up to 5.5 V regardless of VCC (1.65–3.6 V). The Ioff specification ensures no back-drive current when VCC = 0 V, enabling safe partial power-down operation in hot-swap systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across 1.8-V, 2.5-V, and 3.3-V logic domains |
| Max Propagation Delay | 4.8 ns at VCC = 3.3 V - enables high-speed inter-bus communication up to ~200 MHz system clock edge rates |
| Input Voltage Tolerance | Up to 5.5 V - allows direct interfacing with legacy 5-V peripherals without level-shifting components |
| Output Drive Strength | ±12 mA at VCC = 3.0 V - sufficient to drive standard CMOS loads and moderate PCB trace capacitance |
| Bus-Hold Current | ±45 µA at VI = 1.7 V (3.0 V VCC) - actively holds floating inputs at valid logic levels without external resistors |
| Ioff Leakage | ±10 µA at VI/VO = 5.5 V, VCC = 0 V - prevents damaging current flow during power sequencing or hot-plug events |
| ESD Rating | 2000-V HBM - meets industrial-grade robustness requirements for board-level handling and field operation |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, base station, and industrial control environments |
Pinout & Package
TSSOP-48 package (body size 12.50 mm × 6.10 mm), lead-free, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Level-sensitive control: low = B→A data flow; high = A→B data flow per channel |
| 1OE, 2OE | Output enable input | Active-low: low = outputs enabled; high = all A/B port pins enter high-impedance state |
| 1A1–1A8, 2A1–2A8 | Port A I/O | Bi-directional data interface for first and second 8-bit bus segments; includes bus-hold |
| 1B1–1B8, 2B1–2B8 | Port B I/O | Bi-directional data interface for complementary bus segments; 5.5-V tolerant inputs |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins reduce IR drop and improve noise immunity across wide TSSOP body |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for switching currents and EMI suppression |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω output series resistors | Eliminates need for external termination resistors, reducing BOM count and PCB area while suppressing overshoot/undershoot |
| Bus-hold on all data I/Os | Maintains valid logic state on unused or unterminated inputs, preventing metastability and system lockup |
| Ioff partial power-down protection | Blocks current flow between powered and unpowered sections, enabling safe live insertion in modular backplanes |
| 5.5-V tolerant inputs at any VCC | Enables seamless voltage translation from 5-V legacy subsystems to 3.3-V or 1.8-V digital cores without external translators |
| Widebus™ architecture | Optimized for low-noise, high-speed bus interfacing with matched propagation delays across all 16 bits |
Applications
| Telecom Backplane Interfacing | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Bidirectional data exchange between 3.3-V FPGA-based line cards and 5-V legacy switch fabric controllers in carrier-grade routers. IC Role / Device Role / Timing Role: Level-translating bus transceiver managing synchronous parallel address/data transfers across voltage domains. Use Value: Eliminates discrete level shifters and pull-up networks, reducing interconnect latency by 4.8 ns and improving signal integrity on 16-bit parallel buses. | Use Scenario: Isolating and translating sensor/actuator data between 24-V industrial I/O modules and 3.3-V ARM-based controller buses. IC Role / Device Role / Timing Role: Dual-channel transceiver providing galvanically isolated data path control via independent DIR/OE pins per segment. Use Value: Enables hot-swappable I/O module design with Ioff protection, preventing back-drive damage during module insertion/removal. |
| Server Memory Subsystem Bridging | Automotive ADAS Sensor Hub Interface |
Use Scenario: Interfacing DDR3 memory controller (1.5-V) with 3.3-V peripheral management ASIC in enterprise server motherboard designs. IC Role / Device Role / Timing Role: Noninverting transceiver supporting burst-mode read/write cycles with sub-5 ns propagation delay matching timing budgets. Use Value: Maintains setup/hold margins across voltage boundaries while integrating bus-hold to prevent glitches during power sequencing. | Use Scenario: Aggregating camera, radar, and ultrasonic sensor data streams into centralized domain controller in autonomous driving platforms. IC Role / Device Role / Timing Role: High-reliability transceiver handling multi-source parallel data with extended temperature qualification (-40°C to 125°C). Use Value: Delivers latch-up immunity (>250 mA) and 2000-V HBM ESD protection required for under-hood deployment near RF-sensitive sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lacks bus-hold and Ioff; 5-V tolerant inputs only up to VCC + 0.3 V | Suitable for fixed 3.3-V-only systems without hot-swap or floating-input risk | Select when cost sensitivity outweighs robustness requirements and mixed-voltage operation is unnecessary |
| 74ALVCH16245TTR | Higher VCC max (3.6 V same), but no 5.5-V input tolerance; bus-hold present, Ioff absent | Targeted at high-speed 2.5-V/3.3-V telecom ASIC interfaces where 5-V legacy support is excluded | Choose for lower propagation delay (3.8 ns @ 3.3 V) in clean, fully powered environments without voltage translation needs |
Compared with SN74LVC16245ADGGR and 74ALVCH16245TTR, the 74LVCHR16245AZRDR uniquely combines 5.5-V input tolerance, bus-hold, and Ioff in a single TSSOP-48 package-enabling robust mixed-voltage backplane designs without external components or layout compromises.
Availability
74LVCHR16245AZRDR is available at Aetrix Electronics and suitable for telecom infrastructures, industrial transport systems, and wireless infrastructure equipment requiring stable component supply across extended temperature ranges and mixed-voltage interoperability.
Supply support for 74LVCHR16245AZRDR 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
Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in logic, interface, and power management ICs for industrial, automotive, and communications markets.
The 74LVCHR16245AZRDR belongs to TI's Widebus™ family, engineered specifically for high-speed, low-noise bidirectional bus interfacing in multi-voltage systems where reliability, signal integrity, and design simplification are critical.
FAQ
What is the maximum input voltage rating for 74LVCHR16245AZRDR?
The 74LVCHR16245AZRDR accepts input voltages up to 5.5 V on all A- and B-port pins, regardless of VCC setting (1.65 V to 3.6 V). This overvoltage tolerance enables direct connection to 5-V logic without external level shifters. The absolute maximum rating is 6.5 V, but sustained operation above 5.5 V violates recommended conditions and risks reliability degradation.
Does 74LVCHR16245AZRDR support hot-plug operation?
Yes, the 74LVCHR16245AZRDR supports hot-plug operation via its Ioff specification: when VCC = 0 V, input/output leakage remains ≤±10 µA, preventing damaging back-current flow between powered and unpowered subsystems. This makes it suitable for modular telecom line cards and industrial I/O carriers requiring live insertion.
How does bus-hold functionality work on 74LVCHR16245AZRDR?
Bus-hold circuitry on the 74LVCHR16245AZRDR actively maintains the last-valid logic state on all A- and B-port inputs using weak feedback transistors. It operates independently of OE and DIR controls, requires no external resistors, and draws ≤±75 µA at 3.0 V VCC. This prevents floating-input-induced glitches in unterminated or sparsely loaded bus segments.
What is the purpose of the four VCC and eight GND pins on 74LVCHR16245AZRDR?
The 74LVCHR16245AZRDR uses four VCC and eight GND pins in its TSSOP-48 package to minimize power distribution impedance and ground bounce. Distributed power/ground pins reduce simultaneous switching noise, improve high-frequency decoupling effectiveness, and ensure consistent voltage delivery across all 32 I/Os-critical for maintaining 4.8 ns propagation delay accuracy and signal integrity.
Can 74LVCHR16245AZRDR be used as two independent 8-bit transceivers?
Yes, the 74LVCHR16245AZRDR is explicitly designed as a dual-octal transceiver: Channel 1 (pins 1DIR, 1OE, 1A1–1A8, 1B1–1B8) and Channel 2 (pins 2DIR, 2OE, 2A1–2A8, 2B1–2B8) operate completely independently. Each channel has separate direction and output-enable controls, allowing concurrent bidirectional data transfers on distinct bus segments.
74LVCHR16245AZRDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCHR
- Package/Case:
- 54-TFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 54-BGA Microstar Junior (8x5.5)
74LVCHR16245AZRDR FAQ
1.How can I place an order for 74LVCHR16245AZRDR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCHR16245AZRDR 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 74LVCHR16245AZRDR reliable?
The price and inventory of 74LVCHR16245AZRDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCHR16245AZRDR is usually 5 days.
3.What payment methods are accepted for 74LVCHR16245AZRDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCHR16245AZRDR transactions.
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4.How is shipping managed for 74LVCHR16245AZRDR?
74LVCHR16245AZRDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCHR16245AZRDR 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 74LVCHR16245AZRDR?
For technical support, including 74LVCHR16245AZRDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCHR16245AZRDR requirements.
6.How does Aetrix verify that 74LVCHR16245AZRDR is sourced from the original manufacturer or authorized distributors?
All 74LVCHR16245AZRDR 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 74LVCHR16245AZRDR meets industry standards.
7.What is the process for return or replacement of 74LVCHR16245AZRDR?
All 74LVCHR16245AZRDR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCHR16245AZRDR, 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 74LVCHR16245AZRDR part is unused and in its original packaging.
Return procedure for 74LVCHR16245AZRDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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