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Texas Instruments SN74LVCHR16245AGR
- Part No.:
- SN74LVCHR16245AGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74LVCHR16245AGR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
SN74LVCHR16245AGR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65–3.6-V buses. It supports mixed-mode signal operation (5.5-V-tolerant inputs with 3.3-V VCC), features integrated 26-Ω output series resistors, bus-hold on all data I/Os, and Ioff for live insertion. It is used in telecom infrastructure backplanes for voltage-level translation between 3.3-V control logic and 5-V legacy peripherals.
For engineers reviewing the SN74LVCHR16245AGR datasheet, SN74LVCHR16245AGR pinout, SN74LVCHR16245AGR application, or SN74LVCHR16245AGR equivalent, key selection criteria include its 4.8 ns max propagation delay at 3.3 V, ±12 mA output drive capability, 1.65–3.6-V supply range, 5.5-V input tolerance, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVCHR16245AGR implements two independent 8-bit transceiver channels, each controlled by dedicated DIR and OE pins (1DIR/1OE and 2DIR/2OE), enabling flexible A↔B or B↔A data flow per channel. Its bus-hold circuitry actively maintains valid logic states on floating data inputs without external resistors, and Ioff protection disables outputs and blocks current backflow when VCC = 0 V.
All 32 I/O pins (16 A-side, 16 B-side) are 5.5-V tolerant regardless of VCC level, allowing safe interfacing between 3.3-V systems and 5-V peripherals. Outputs integrate 26-Ω series termination to suppress overshoot/undershoot, eliminating need for external damping resistors while maintaining signal integrity up to 100 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage embedded and industrial logic domains. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V TTL/CMOS sources without level-shifting circuitry. |
| Max Propagation Delay | 4.8 ns at VCC = 3.3 V - Supports high-speed data transfer in backplane and memory interface applications. |
| Output Drive Strength | ±12 mA at VCC = 3.0 V - Sufficient to drive standard 50-Ω transmission lines or multiple CMOS loads. |
| Bus-Hold Current | ±45 µA at VI = 1.7 V (3 V VCC) - Actively holds floating inputs at valid logic levels, removing need for external pull resistors. |
| Ioff Leakage | ±10 µA at VI/VO = 5.5 V, VCC = 0 V - Prevents damaging back-current during hot-swap or partial power-down sequences. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements for handling and board assembly. |
Pinout & Package
TSSOP-48 package (DGG), body size 12.50 mm × 6.10 mm, 0.5-mm pitch, lead-free NiPdAu finish, MSL Level-1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per 8-bit channel: DIR = L enables B→A; DIR = H enables A→B. |
| 1OE, 2OE | Output enable input | Active-low control: OE = L enables transceiver; OE = H places both A and B ports in high-impedance isolation. |
| 1A1–1A8, 2A1–2A8 | A-side data I/O | 8-bit port A for one transceiver channel; accepts 5.5-V inputs, drives 3.3-V compatible outputs with 26-Ω series resistance. |
| 1B1–1B8, 2B1–2B8 | B-side data I/O | 8-bit port B for same channel; functionally identical to A-side, enabling bidirectional communication per channel. |
| VCC (Pins 7,18,31,42) | Power supply | Four distributed VCC pins reduce supply impedance and improve noise immunity across the 48-pin layout. |
| GND (Pins 4,10,15,21,28,39,45) | Ground reference | Seven GND pins provide low-inductance return paths, critical for signal integrity and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | 5.5-V-tolerant inputs operate reliably with 1.65–3.6-V VCC, enabling seamless 3.3-V ↔ 5-V system interfacing without external translators. |
| Integrated 26-Ω output series resistors | Eliminates need for discrete series termination resistors, reducing BOM count and PCB area while controlling edge rates and suppressing ringing. |
| Active bus-hold on all data I/Os | Maintains stable logic state on unused or unterminated inputs, preventing metastability and eliminating external pullup/pulldown components. |
| Ioff partial-power-down support | Blocks current flow between powered and unpowered sections during hot-plug or staggered power sequencing, protecting downstream circuitry. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes switching noise coupling into shared ground planes, improving noise margin in multi-channel digital systems. |
Applications
| Telecom Backplane Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Interfacing 3.3-V FPGA control logic with legacy 5-V peripheral cards in modular telecom chassis. IC Role / Device Role / Timing Role: Bidirectional bus transceiver translating voltage levels and isolating fault domains between hot-swappable line cards. Use Value: Eliminates discrete level shifters and pull resistors, reduces interconnect complexity, and ensures reliable data handshaking across mixed-voltage domains. |
Use Scenario: Connecting microcontroller GPIO banks to isolated 24-V digital input/output terminals in programmable logic controllers. IC Role / Device Role / Timing Role: Signal buffer and voltage translator enabling safe, noise-immune communication between low-voltage logic and industrial field-side circuits. Use Value: Bus-hold prevents floating inputs during module insertion/removal; Ioff protects MCU during partial power cycling of I/O sections. |
| Server Memory Subsystem | Test Equipment Data Acquisition |
Use Scenario: Isolating DDR memory controller address/data buses from diagnostic or configuration interfaces in high-reliability servers. IC Role / Device Role / Timing Role: 3-state bus isolator with fast enable/disable timing (6.3 ns ten, 7.4 ns tdis) for dynamic bus sharing during firmware updates. Use Value: 4.8 ns tpd ensures minimal latency impact; 26-Ω output resistors dampen reflections on stubbed memory bus traces. |
Use Scenario: Routing parallel digital test patterns between pattern generator ASICs and DUT interface boards in automated test equipment. IC Role / Device Role / Timing Role: High-fidelity bidirectional data conduit supporting multi-MHz pattern rates with controlled edge integrity. Use Value: 5.5-V input tolerance accommodates diverse signal sources; low VOLP/VOHV specs preserve logic margins under heavy capacitive loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245A | 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 without floating inputs or 5-V interfacing needs. | Select when cost sensitivity outweighs mixed-voltage and bus-stability requirements. |
| SN74AVC16245 | Lower VCC range (1.2–3.6 V); higher speed (3.2 ns tpd at 1.8 V); no Ioff or bus-hold. | Better for ultra-low-voltage portable designs; lacks live-insertion and floating-input handling capabilities. | Prefer for battery-powered applications requiring sub-1.8-V operation where Ioff and bus-hold are not needed. |
Compared with SN74LVC16245A and SN74AVC16245, the SN74LVCHR16245AGR uniquely combines 5.5-V input tolerance, active bus-hold, and Ioff in a single 3.3-V-compatible device-making it the only choice for robust, mixed-voltage backplane and industrial I/O isolation where reliability under undefined conditions is mandatory.
Availability
SN74LVCHR16245AGR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and server memory subsystems requiring stable component supply across extended temperature ranges (–40°C to +125°C) and long production lifecycles.
Supply support for SN74LVCHR16245AGR 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in logic interface solutions.
The SN74LVCHR16245AGR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-reliability, mixed-voltage system interconnect in telecom, industrial automation, and computing infrastructure.
FAQ
What is the maximum operating temperature for the SN74LVCHR16245AGR?
The SN74LVCHR16245AGR is rated for operation from –40°C to +125°C ambient temperature, as confirmed in the Recommended Operating Conditions table of the official datasheet (SCAS582Q, Rev Q). This extended range supports deployment in industrial control cabinets and telecom base station environments where thermal management is challenging.
Does the SN74LVCHR16245AGR support live insertion or hot-swap applications?
Yes, the SN74LVCHR16245AGR supports live insertion via its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V. This is explicitly documented in the Features and Detailed Description sections of the datasheet, making SN74LVCHR16245AGR suitable for hot-pluggable modules in telecom and server backplanes.
Can the SN74LVCHR16245AGR translate 5-V signals to a 3.3-V system?
Yes - the SN74LVCHR16245AGR accepts input voltages up to 5.5 V regardless of VCC level (1.65–3.6 V), enabling true down-translation from 5-V logic to 3.3-V domains without external level shifters. This capability is verified in the "Inputs Accept Voltages to 5.5 V" feature and Electrical Characteristics tables.
How does the bus-hold feature work on the SN74LVCHR16245AGR?
The bus-hold circuitry on the SN74LVCHR16245AGR actively maintains the last-valid logic state on any floating data I/O pin using internal feedback, eliminating need for external pullup/pulldown resistors. It operates independently of OE and DIR controls and is specified with ±45 µA hold current at 3 V VCC, per the II(hold) parameter in Section 7.5.
What package type and RoHS status does the SN74LVCHR16245AGR use?
The SN74LVCHR16245AGR uses a TSSOP-48 (DGG) package with 12.50 mm × 6.10 mm body size and 0.5-mm pitch. It is RoHS-compliant (lead-free NiPdAu finish), MSL Level-1, and rated for peak reflow at 260°C - confirmed in TI's official Packaging Information addendum for orderable part SN74LVCHR16245AGR.
SN74LVCHR16245AGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCHR
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 48-TSSOP
SN74LVCHR16245AGR FAQ
1.How can I place an order for SN74LVCHR16245AGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCHR16245AGR 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 SN74LVCHR16245AGR reliable?
The price and inventory of SN74LVCHR16245AGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCHR16245AGR is usually 5 days.
3.What payment methods are accepted for SN74LVCHR16245AGR?
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4.How is shipping managed for SN74LVCHR16245AGR?
SN74LVCHR16245AGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCHR16245AGR 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 SN74LVCHR16245AGR?
For technical support, including SN74LVCHR16245AGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCHR16245AGR requirements.
6.How does Aetrix verify that SN74LVCHR16245AGR is sourced from the original manufacturer or authorized distributors?
All SN74LVCHR16245AGR 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 SN74LVCHR16245AGR meets industry standards.
7.What is the process for return or replacement of SN74LVCHR16245AGR?
All SN74LVCHR16245AGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCHR16245AGR, 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 SN74LVCHR16245AGR part is unused and in its original packaging.
Return procedure for SN74LVCHR16245AGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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