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Texas Instruments 74LVCHR16245AGRDR
- Part No.:
- 74LVCHR16245AGRDR
- Manufacturer:
- Texas Instruments
- Package:
- 54-TFBGA
- Datasheet:
-
74LVCHR16245AGRDR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 54BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,175
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Product details
Overview
74LVCHR16245AGRDR 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 mixed-voltage server interconnects.
For engineers reviewing the 74LVCHR16245AGRDR datasheet, 74LVCHR16245AGRDR pinout, 74LVCHR16245AGRDR application, or 74LVCHR16245AGRDR equivalent, key selection criteria include voltage translation capability (5.5-V input tolerance at 3.3-V VCC), tpd ≤ 4.8 ns at 3.3 V, bus-hold elimination of external biasing, and Ioff-enabled partial power-down isolation.
Technical Context
This device implements two independent 8-bit transceiver sections, each with dedicated DIR and OE controls, enabling flexible A↔B or B↔A data flow per section. Direction control is level-sensitive and asynchronous; output enable operates independently per section to isolate either bus pair without affecting the other.
All 32 I/O pins (16 A-side, 16 B-side) feature bus-hold circuitry that actively maintains valid logic states on floating inputs, and integrated 26-Ω series termination eliminates need for external damping resistors. Ioff functionality ensures no back-drive current when VCC = 0 V, supporting hot-swap and mixed-power-rail system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage logic families including 1.8-V, 2.5-V, and 3.3-V systems. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct interfacing with 5-V peripherals without level shifters in down-translation applications. |
| Max Propagation Delay | 4.8 ns at VCC = 3.3 V - Supports high-speed data transfer up to ~200 MHz bus rates with tight timing margins. |
| Output Drive Strength | ±12 mA at VCC = 3.3 V - Sufficient to drive standard CMOS loads and moderate PCB trace capacitance. |
| Bus-Hold Current | ±75 µA at VCC = 3.0 V - Actively holds unused inputs at valid logic levels, eliminating external pullup/pulldown resistors. |
| Ioff Leakage | ±10 µA at VI/VO = 5.5 V, VCC = 0 V - Prevents damaging current flow during partial power-down or hot-insertion events. |
| ESD Rating | 2000-V HBM - Meets industrial-grade electrostatic discharge robustness requirements per JESD22-A114. |
Pinout & Package
TSSOP-48 package (body size 12.50 mm × 6.10 mm), lead-free and RoHS-compliant, with exposed pad not present. Pin assignments follow TI-standard DGG footprint; 48-pin layout supports high-density routing while maintaining signal integrity for parallel bus interfaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Level-sensitive control: LOW enables B→A data flow; HIGH enables A→B flow per respective 8-bit section. |
| 1OE, 2OE | Output Enable Input | Active-LOW: asserts 3-state high-impedance on corresponding A/B port pair, isolating buses without affecting direction logic. |
| 1A1–1A8, 2A1–2A8 | Data I/O Port A | Bi-directional data terminals for first and second 8-bit bus segments; include bus-hold and 5.5-V tolerant inputs. |
| 1B1–1B8, 2B1–2B8 | Data I/O Port B | Bi-directional data terminals paired with respective A ports; identical electrical characteristics and bus-hold behavior. |
| VCC (Pins 7,18,31,42) | Power Supply | Four distributed VCC pins reduce supply impedance and improve noise immunity across wide bus interface. |
| GND (Pins 4,10,15,21,28,34,39,45) | Ground Reference | Eight GND pins provide low-inductance return paths, critical for minimizing ground bounce (VOLP < 0.8 V at 3.3 V). |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5.5-V tolerant inputs at 1.65–3.6-V VCC enable seamless interfacing between 3.3-V logic and legacy 5-V peripherals. |
| Integrated 26-Ω output series resistance | Eliminates need for discrete series termination resistors, reducing BOM count and PCB area while controlling edge rates. |
| Bus-hold on all data I/Os | Prevents floating inputs from drifting to indeterminate states-no external biasing required, simplifying design and improving reliability. |
| Ioff partial power-down protection | Blocks current flow when VCC = 0 V, allowing safe insertion/removal in powered-backplane systems without disrupting adjacent circuitry. |
| Low ground bounce (VOLP) | Typical < 0.8 V at VCC = 3.3 V, TA = 25°C - Reduces noise coupling into sensitive analog sections and improves signal integrity. |
Applications
| Telecom Backplane Interconnect | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Bidirectional data exchange between 3.3-V FPGA control plane and 5-V legacy line cards in modular telecom chassis. IC Role / Device Role / Timing Role: Level-translating bus transceiver providing isolated, direction-controlled data path with sub-5-ns propagation delay. Use Value: Eliminates discrete level shifters and termination resistors, reducing interconnect complexity and board space by >30% versus discrete solutions. |
Use Scenario: Isolating field-side 24-V digital I/O signals from 3.3-V microcontroller domain in programmable logic controller modules. IC Role / Device Role / Timing Role: Bus-isolation transceiver with Ioff and bus-hold, enabling safe hot-swap of I/O cards without system reset. Use Value: Prevents back-driving during card insertion and holds floating inputs during maintenance, avoiding spurious state transitions. |
| Server Memory Subsystem | Test Equipment Data Bus |
|
Use Scenario: Buffering address/data/control lines between DDR4 memory controller (1.2-V core, 1.8-V I/O) and DIMM slots in enterprise servers. IC Role / Device Role / Timing Role: High-speed 16-bit transceiver with matched propagation delay across all lanes for skew-critical memory interfaces. Use Value: Maintains timing alignment across 16-bit paths with tpd variation < 0.5 ns, supporting reliable operation at 2400 MT/s data rates. |
Use Scenario: Interfacing automated test equipment (ATE) pattern generators (5-V TTL) with 3.3-V DUTs in semiconductor final test handlers. IC Role / Device Role / Timing Role: Reconfigurable bidirectional translator enabling both stimulus delivery and response capture on shared test bus. Use Value: Single-device solution replaces dual unidirectional buffers, cutting test head component count and improving channel-to-channel timing correlation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | No bus-hold; no 5.5-V input tolerance; max VCC = 3.6 V but inputs limited to VCC + 0.3 V. | Suitable only in homogeneous 3.3-V systems; requires external pullups if inputs float. | Select when cost sensitivity outweighs mixed-voltage flexibility and bus-hold convenience. |
| 74ALVC16245PW | Higher ICC; no Ioff; bus-hold absent; 3.6-V max VCC but inputs not 5-V tolerant. | Limited to low-power 3.3-V-only designs; lacks hot-swap safety and floating-input immunity. | Choose only for legacy ALVC-family compatibility where TI LVCH-series features are unnecessary. |
Compared with SN74LVC16245ADGGR and 74ALVC16245PW, the 74LVCHR16245AGRDR uniquely combines 5.5-V input tolerance, bus-hold, and Ioff in a single TSSOP-48 package-enabling robust mixed-voltage operation without external components or layout compromises.
Availability
74LVCHR16245AGRDR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLC I/O modules, and server memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVCHR16245AGRDR 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 specializing in analog, embedded processing, and logic ICs, with leadership in industrial, automotive, and communications markets.
The 74LVCHR16245AGRDR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-reliability, mixed-voltage data routing in telecom, computing, and industrial control systems.
FAQ
What is the maximum input voltage rating for 74LVCHR16245AGRDR?
The 74LVCHR16245AGRDR supports input voltages up to 5.5 V regardless of VCC level (1.65 V to 3.6 V), enabling direct interfacing with 5-V logic without external level-shifting circuitry. This overvoltage tolerance is specified across the full operating temperature range and applies to all data and control inputs (DIR, OE, A/B ports).
Does 74LVCHR16245AGRDR require external pullup resistors on unused inputs?
No. The 74LVCHR16245AGRDR integrates active bus-hold circuitry on all data I/O pins (A1–A8, B1–B8 per section), which maintains valid logic states on floating inputs without external components. Using pullup or pulldown resistors with enabled bus-hold is not recommended and may cause excessive current draw.
Can 74LVCHR16245AGRDR be used in hot-swap applications?
Yes. The 74LVCHR16245AGRDR includes Ioff circuitry that disables outputs and blocks current flow when VCC = 0 V, preventing back-drive damage during live insertion or removal. This feature is validated per JESD78 and supports safe operation in powered-backplane telecom and server systems.
What is the typical propagation delay of 74LVCHR16245AGRDR at 3.3 V?
The 74LVCHR16245AGRDR achieves a maximum propagation delay (tpd) of 4.8 ns at VCC = 3.3 V, TA = 25°C, with ±0.3-V output swing. This value is guaranteed across the full operating temperature range (–40°C to +125°C) and supports high-speed parallel bus operation up to 200+ MHz clock-equivalent rates.
How many VCC and GND pins does the 74LVCHR16245AGRDR TSSOP-48 package have?
The 74LVCHR16245AGRDR in TSSOP-48 (DGG) package has four VCC pins (pins 7, 18, 31, 42) and eight GND pins (pins 4, 10, 15, 21, 28, 34, 39, 45). This distributed power/ground architecture minimizes supply impedance and reduces ground bounce (VOLP < 0.8 V at 3.3 V).
74LVCHR16245AGRDR 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)
74LVCHR16245AGRDR FAQ
1.How can I place an order for 74LVCHR16245AGRDR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCHR16245AGRDR 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 74LVCHR16245AGRDR reliable?
The price and inventory of 74LVCHR16245AGRDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCHR16245AGRDR is usually 5 days.
3.What payment methods are accepted for 74LVCHR16245AGRDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCHR16245AGRDR transactions.
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4.How is shipping managed for 74LVCHR16245AGRDR?
74LVCHR16245AGRDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCHR16245AGRDR 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 74LVCHR16245AGRDR?
For technical support, including 74LVCHR16245AGRDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCHR16245AGRDR requirements.
6.How does Aetrix verify that 74LVCHR16245AGRDR is sourced from the original manufacturer or authorized distributors?
All 74LVCHR16245AGRDR 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 74LVCHR16245AGRDR meets industry standards.
7.What is the process for return or replacement of 74LVCHR16245AGRDR?
All 74LVCHR16245AGRDR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCHR16245AGRDR, 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 74LVCHR16245AGRDR part is unused and in its original packaging.
Return procedure for 74LVCHR16245AGRDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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