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Texas Instruments 74LVCR16245ADGGRG4
- Part No.:
- 74LVCR16245ADGGRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74LVCR16245ADGGRG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,227
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Product details
Overview
74LVCR16245ADGGRG4 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 features 5.5-V-tolerant inputs, 26-Ω integrated series output resistors, Ioff support for live insertion, and max propagation delay of 4.8 ns at 3.3 V. Used in server backplanes and mixed-voltage telecom interfaces.
For engineers reviewing the 74LVCR16245ADGGRG4 datasheet, 74LVCR16245ADGGRG4 pinout, 74LVCR16245ADGGRG4 application, or 74LVCR16245ADGGRG4 equivalent, key selection criteria include voltage translation capability (5.5-V input tolerance with 3.3-V VCC), bus-hold circuitry for undriven inputs, tpd ≤4.8 ns at 3.3 V, Ioff-enabled partial-power-down operation, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The 74LVCR16245ADGGRG4 implements two independent 8-bit bidirectional transceiver sections, 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; OE = H forces both ports into high-impedance isolation.
All 32 I/O pins (16 A-side, 16 B-side) feature integrated 26-Ω series resistors to damp edge rates and suppress switching noise on long traces or cables. Input circuitry remains active regardless of OE state, requiring all unused inputs to be tied to VCC or GND to prevent excess ICC and undefined logic states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage logic domains including 1.8-V, 2.5-V, and 3.3-V systems. |
| Input Voltage Tolerance | Up to 5.5 V - Supports mixed-mode signal interfacing: 5-V peripherals driving 3.3-V buses without external level shifters. |
| Max Propagation Delay | 4.8 ns at VCC = 3.3 V - Ensures timing compliance in high-speed parallel bus applications up to ~200 MHz effective data rate. |
| Output Drive Strength | ±12 mA at VCC = 3.0 V - Sufficient to drive standard CMOS loads and moderate capacitive stubs without external buffers. |
| Ioff Current | ±10 µA at VI/VO = 5.5 V, VCC = 0 V - Prevents damaging back-current during hot-swap or partial power-down sequences. |
| Bus-Hold Circuitry | Active on all A/B inputs - Eliminates need for external pull-up/down resistors on unused or intermittently driven data lines. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements for handling and board-level integration. |
Pinout & Package
TSSOP-48 (DGG) package: 12.50 mm × 6.1 mm body, 0.5-mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Level-sensitive control: Low = B-port drives A-port; High = A-port drives B-port. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-low: Low = transceiver enabled; High = both A and B ports enter high-Z state. |
| 1A1–1A8, 2A1–2A8 | A-side bidirectional I/O | Data interface for first/second 8-bit bus segment; internally terminated with 26-Ω series resistor. |
| 1B1–1B8, 2B1–2B8 | B-side bidirectional I/O | Data interface for complementary 8-bit bus segment; same termination and voltage tolerance as A-side. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins reduce IR drop and improve noise immunity across wide bus layout. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all I/Os and support clean signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| 5.5-V tolerant inputs | Enables direct connection of legacy 5-V logic to 3.3-V or lower VCC systems without external translators. |
| Integrated 26-Ω output series resistors | Reduces edge-induced EMI and eliminates need for discrete series termination resistors on PCB. |
| Ioff partial-power-down protection | Blocks current flow between powered and unpowered system domains during hot-plug or power sequencing events. |
| Active bus-hold on all inputs | Maintains valid logic levels on floating or unterminated data lines, preventing metastability and system lockup. |
| Widebus™ architecture | Optimized for high-speed, low-noise parallel bus communication in enterprise and infrastructure equipment. |
Applications
| Server Backplane Interfacing | PC Chipset Bridging |
|---|---|
Use Scenario: Bidirectional data exchange between CPU/memory controller and peripheral expansion slots in 1U/2U rack servers. IC Role / Device Role / Timing Role: 16-bit transceiver isolating and translating signals between 3.3-V PCIe root complex and 5-V legacy add-in cards. Use Value: Eliminates discrete level-shifting components while maintaining <4.8 ns tpd for synchronous backplane timing budgets. | Use Scenario: Data path bridging between northbridge and southbridge in desktop/notebook motherboards with mixed-voltage domains. IC Role / Device Role / Timing Role: Dual-octal transceiver enabling concurrent address/data transfer between 2.5-V memory controller and 3.3-V I/O subsystem. Use Value: Integrated bus-hold prevents latch-up during chipset reset sequences; Ioff protects southbridge during CPU power cycling. |
| Network Switch Fabric Interface | Telecom Line Card Signal Routing |
Use Scenario: Interfacing packet processor ASICs to PHY modules across multiple voltage rails in Layer 2/3 switches. IC Role / Device Role / Timing Role: 16-bit bidirectional buffer managing control/status and data lanes between 1.8-V switch fabric and 3.3-V management interfaces. Use Value: 26-Ω series resistors suppress crosstalk on dense 10-cm backplane traces; 5.5-V tolerance accommodates out-of-spec PHY resets. | Use Scenario: Signal routing between DSP-based baseband processors and analog front-end (AFE) ICs in wireless base station line cards. IC Role / Device Role / Timing Role: Isolating and translating parallel control bus signals (e.g., SPI configuration, GPIO status) between 3.3-V DSP and 5-V AFE. Use Value: Eliminates risk of damage during AFE power-up before DSP initialization due to Ioff-enabled isolation. |
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 5.5-V input tolerance; max VI = VCC + 0.3 V; lacks integrated 26-Ω resistors. | Suitable only for same-rail 3.3-V systems; requires external termination and level-shifting for 5-V interfaces. | Select when cost sensitivity outweighs mixed-voltage flexibility and board space is available for discrete resistors. |
| 74ALVC16245PW | Higher drive (±24 mA); faster tpd (3.3 ns @ 3.3 V); no Ioff or bus-hold; 3.6-V max VCC. | Better for speed-critical, single-rail 3.3-V designs; unsuitable for hot-swap or undriven bus scenarios. | Choose for maximum throughput in compact FPGA-to-FPGA interconnects where power sequencing is tightly controlled. |
Compared with SN74LVC16245ADGGR and 74ALVC16245PW, the 74LVCR16245ADGGRG4 uniquely combines 5.5-V input tolerance, integrated termination, Ioff, and bus-hold-making it the only option for robust, space-constrained mixed-voltage backplane designs requiring zero external components.
Availability
74LVCR16245ADGGRG4 is available at Aetrix Electronics and suitable for server backplanes, telecom line cards, and PC chipset bridging requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant TSSOP packaging.
Supply support for 74LVCR16245ADGGRG4 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 delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power, and signal chain technologies.
The 74LVCR16245ADGGRG4 belongs to TI's Widebus™ family-engineered specifically for high-speed, low-noise, mixed-voltage parallel bus interfacing in enterprise computing and communications infrastructure.
FAQ
What is the maximum operating temperature range for the 74LVCR16245ADGGRG4?
The 74LVCR16245ADGGRG4 is specified for operation from –40°C to +85°C ambient temperature, as confirmed in TI's official orderable addendum and Recommended Operating Conditions table. This industrial-grade range supports deployment in server chassis, telecom cabinets, and embedded control environments where thermal management is constrained. The device maintains full electrical performance-including tpd ≤4.8 ns and Ioff ≤±10 µA-across this entire range.
Does the 74LVCR16245ADGGRG4 require external pull-up resistors on DIR or OE pins?
No, the 74LVCR16245ADGGRG4 does not require external pull-up resistors on DIR or OE pins for functional operation, as these are standard CMOS inputs with rail-to-rail voltage thresholds. However, TI recommends tying OE to VCC via a pull-up resistor during power-up/power-down to guarantee high-impedance state; minimum value depends on driver sink capability. DIR may float only if actively driven-unused DIR pins must be tied to VCC or GND to prevent excess ICC, per Section 7.3 of the datasheet.
Can the 74LVCR16245ADGGRG4 be used for unidirectional data transfer?
Yes, the 74LVCR16245ADGGRG4 supports unidirectional operation: configure one DIR pin permanently high (A→B) or low (B→A) and use the corresponding OE to enable/disable that direction. Its dual-octal architecture allows independent control-e.g., 8-bit A→B + 8-bit B→A simultaneously-or consolidated 16-bit flow. All 32 I/Os remain 5.5-V tolerant and retain bus-hold functionality regardless of direction mode.
What is the purpose of the 26-Ω series resistors on each I/O pin of the 74LVCR16245ADGGRG4?
The 26-Ω series resistors on every A- and B-side I/O pin of the 74LVCR16245ADGGRG4 damp signal edge rates to reduce simultaneous switching noise (SSN), overshoot, and crosstalk on long PCB traces or cables. They eliminate the need for discrete 22–33-Ω source termination resistors, saving board space and BOM cost. Measured VOLP <0.8 V and VOHV >2 V at 3.3 V confirm effective noise suppression without compromising rise/fall time specs (Δt/Δv = 10 ns/V).
Is the 74LVCR16245ADGGRG4 pin-compatible with older SN74LVTH16245A devices?
No, the 74LVCR16245ADGGRG4 is not pin-compatible with SN74LVTH16245A. While both are 48-pin TSSOP transceivers, pin assignments differ significantly-e.g., VCC and GND locations, DIR/OE placement, and I/O grouping-due to distinct internal architectures and noise-reduction design priorities. Migration requires PCB layout revision. Functional equivalence exists only at the logical level (dual-octal bidirectional transceiver), not mechanical or electrical pinout.
74LVCR16245ADGGRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74LVCR16245ADGGRG4 FAQ
1.How can I place an order for 74LVCR16245ADGGRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCR16245ADGGRG4 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 74LVCR16245ADGGRG4 reliable?
The price and inventory of 74LVCR16245ADGGRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCR16245ADGGRG4 is usually 5 days.
3.What payment methods are accepted for 74LVCR16245ADGGRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCR16245ADGGRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVCR16245ADGGRG4?
74LVCR16245ADGGRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCR16245ADGGRG4 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 74LVCR16245ADGGRG4?
For technical support, including 74LVCR16245ADGGRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCR16245ADGGRG4 requirements.
6.How does Aetrix verify that 74LVCR16245ADGGRG4 is sourced from the original manufacturer or authorized distributors?
All 74LVCR16245ADGGRG4 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 74LVCR16245ADGGRG4 meets industry standards.
7.What is the process for return or replacement of 74LVCR16245ADGGRG4?
All 74LVCR16245ADGGRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCR16245ADGGRG4, 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 74LVCR16245ADGGRG4 part is unused and in its original packaging.
Return procedure for 74LVCR16245ADGGRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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