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Texas Instruments SN74ALVC16245DGGR
- Part No.:
- SN74ALVC16245DGGR
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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SN74ALVC16245DGGR.pdf
- Description:
- BUS TRANSCEIVER
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Product details
Overview
SN74ALVC16245DGGR from Texas Instruments is a 16-bit noninverting bus transceiver designed for asynchronous bidirectional data transfer between two 16-bit buses operating at 2.3 V to 3.6 V supply voltage, featuring ±24 mA output drive at 3.0 V, bus-hold inputs eliminating external resistors, and operation across −40°C to 85°C - used in backplane interface and memory expansion subsystems.
For engineers reviewing the SN74ALVC16245DGGR datasheet, SN74ALVC16245DGGR pinout, SN74ALVC16245DGGR application, or SN74ALVC16245DGGR equivalent, this page delivers verified electrical specs, dual-octal directional control logic, TSSOP-48 package details, thermal limits, and direct alternatives for industrial bus isolation and level-shifting designs.
Technical Context
The SN74ALVC16245DGGR implements two independent 8-bit transceiver sections, each with separate DIR (direction) and OE (output-enable) controls, enabling A→B or B→A data flow per section. Its EPIC™ submicron CMOS process ensures low propagation delay (≤3.6 ns at 3.3 V) and high noise immunity.
Bus-hold circuitry actively maintains valid logic levels on unused inputs without external biasing; absolute maximum ratings include −0.5 V to VCC + 0.5 V I/O voltage range and ±50 mA output clamp current - critical for hot-swap and mixed-voltage system robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports mixed-voltage interfacing between 2.5 V and 3.3 V domains. |
| IOH/IOL | −24 mA / +24 mA at VCC = 3.0 V - drives standard LVTTL loads with margin for fanout and trace capacitance. |
| tpd (Max) | 3.6 ns at VCC = 3.3 V, CL = 50 pF - enables >100 MHz bus toggle rates in point-to-point configurations. |
| Bus-Hold Current | ±75 µA at VCC = 3.0 V - maintains stable logic state on floating inputs without pull-up/down resistors. |
| Operating Temp | −40°C to +85°C - qualified for industrial temperature-grade PCB deployment. |
| ESD Rating | >2000 V HBM, >200 V MM - exceeds MIL-STD-883C and JEDEC JESD22-A114 requirements. |
| Power Dissipation | 0.85 W max at TA = 55°C (TSSOP-48) - defines thermal derating envelope for dense board layouts. |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5 mm pitch, gull-wing leads, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Low = B→A data flow; High = A→B data flow - enables independent bidirectional control of each octal bank. |
| 1OE, 2OE | Output-enable input (active-low) | High = outputs in high-impedance state - isolates both A and B buses simultaneously when asserted. |
| 1A1–1A8, 2A1–2A8 | Port A data inputs/outputs | Connect to source bus; driven by DIR/OE logic - electrically identical to B-side pins but assigned to A-bus domain. |
| 1B1–1B8, 2B1–2B8 | Port B data inputs/outputs | Connect to destination bus; direction determined by DIR - supports full 16-bit or split 8-bit transceiver modes. |
| VCC (Pins 7, 18, 29, 40) | Supply voltage | Four distributed VCC pins reduce IR drop and improve noise rejection across wide bus widths. |
| GND (Pins 4, 11, 22, 33, 45) | Ground reference | Five GND pins provide low-inductance return paths for all 16 drivers - essential for signal integrity at high edge rates. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold inputs | Eliminates need for 32 external pullup/pulldown resistors in typical 16-bit bus interface, reducing BOM count and layout area. |
| Dual-octal architecture | Allows independent control of two 8-bit data paths via separate DIR/OE pins - supports asymmetric bus protocols and partial bus enablement. |
| EPIC™ submicron CMOS | Delivers 3.6 ns max propagation delay at 3.3 V while maintaining 2.3 V minimum VCC - extends battery life in portable 2.5 V systems. |
| Hot-insertion tolerance | Clamp-current rating (±50 mA) and I/O voltage limit (VCC + 0.5 V) permit safe insertion into live backplanes without damaging adjacent devices. |
| Widebus™ family compatibility | Shares pinout and timing behavior with SN74ALVC16244/SN74ALVC16373 - simplifies design reuse across transceiver, latch, and buffer functions. |
Applications
| Memory Expansion Interface | Backplane Data Bridge |
|---|---|
|
Use Scenario: Interfacing a 32-bit microprocessor local bus to two independent 16-bit SRAM banks operating at different voltage levels. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing address/data flow between CPU and memory modules with independent direction control per bank. Use Value: Enables simultaneous read/write operations across dual memory banks using single SN74ALVC16245DGGR, reducing component count versus discrete octal buffers. |
Use Scenario: Isolating control signals between a hot-pluggable peripheral card and a main system backplane in industrial PLC racks. IC Role / Device Role / Timing Role: Bus-isolation transceiver providing controlled signal coupling with bus-hold protection during card insertion/removal events. Use Value: Prevents floating bus states and signal corruption during hot-swap sequences - eliminates need for mechanical interlocks or sequenced power rails. |
| PCI-to-ISA Bridge Logic | Test Equipment Signal Routing |
|
Use Scenario: Translating 3.3 V PCI control signals to 5 V ISA-compatible logic levels in legacy adapter cards. IC Role / Device Role / Timing Role: Noninverting transceiver configured as unidirectional level shifter with OE-controlled isolation during bus arbitration. Use Value: Supports 3.3 V/5 V mixed-signaling without external level translators - leverages native 2.3–3.6 V VCC range and TTL-compatible thresholds. |
Use Scenario: Dynamically reconfiguring signal paths between DUT (device under test) and ATE (automatic test equipment) channels in semiconductor validation fixtures. IC Role / Device Role / Timing Role: Programmable bus switch enabling software-directed routing of up to 16 digital I/O lines between test head and device pins. Use Value: Reduces fixture complexity by replacing multiple SPDT relays with one IC - achieves <4 ns channel switching latency and 0.5 mm² footprint per signal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lower drive strength (±24 mA only at VCC ≥ 3.0 V); no bus-hold; 1.65–3.6 V VCC range. | Lacks bus-hold - requires external biasing for floating inputs; better suited for cost-sensitive 1.8 V/3.3 V systems with controlled signal routing. | Select when bus-hold is unnecessary and lower static current (<10 µA ICC) is prioritized over floating-input robustness. |
| 74ALVCH16245DGG | Higher drive (±32 mA at 3.3 V); includes power-down mode (Ioff); same TSSOP-48 package and pinout. | Supports live insertion with Ioff protection - prevents current backflow when VCC = 0; ideal for hot-swap backplanes requiring zero-power isolation. | Choose for new designs requiring enhanced hot-swap safety and higher drive capability, accepting slightly higher quiescent current. |
Compared with SN74ALVC16245DGGR, SN74LVC16245ADGGR trades bus-hold for wider VCC range and lower ICC, while 74ALVCH16245DGG adds Ioff and higher drive at the cost of increased power consumption - all three share identical TSSOP-48 footprint and core transceiver functionality.
Availability
SN74ALVC16245DGGR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and test equipment signal routing requiring stable component supply across extended temperature ranges.
Supply support for SN74ALVC16245DGGR 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 logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74ALVC16245DGGR belongs to TI's Widebus™ family of high-speed CMOS bus interface devices, engineered specifically for low-voltage, high-fanout bidirectional data transfer in space-constrained industrial and computing systems.
FAQ
What is the maximum propagation delay of the SN74ALVC16245DGGR at 3.3 V?
The SN74ALVC16245DGGR has a maximum propagation delay (tpd) of 3.6 ns at VCC = 3.3 V with CL = 50 pF, measured from input transition to valid output transition. This value is specified across the full operating temperature range (−40°C to 85°C) and ensures reliable timing closure in high-speed 16-bit bus applications up to ~100 MHz toggle rate.
Does the SN74ALVC16245DGGR support hot-swap operation?
Yes, the SN74ALVC16245DGGR supports hot-swap operation due to its I/O voltage rating of −0.5 V to VCC + 0.5 V and ±50 mA output clamp current, which prevent damage during live insertion. However, it lacks explicit Ioff protection - for guaranteed zero-current backflow during VCC ramp-up/down, consider 74ALVCH16245DGG instead.
Can the SN74ALVC16245DGGR be used for level translation between 2.5 V and 3.3 V buses?
Yes, the SN74ALVC16245DGGR operates across 2.3 V to 3.6 V VCC and accepts input voltages from 0 V to VCC, making it suitable for bidirectional level translation between 2.5 V and 3.3 V domains. Its VIH/VIL thresholds scale with VCC, ensuring compatible logic thresholds at both supply levels without external biasing.
How does the bus-hold feature work on the SN74ALVC16245DGGR?
The SN74ALVC16245DGGR integrates active bus-hold circuitry on all data inputs (A and B ports), providing ±75 µA holding current at VCC = 3.0 V to maintain the last-valid logic state when inputs float. This eliminates the need for external pullup/pulldown resistors while consuming negligible additional current in steady state.
Is the SN74ALVC16245DGGR pin-compatible with other Widebus™ transceivers?
Yes, the SN74ALVC16245DGGR shares identical TSSOP-48 (DGG) pinout and functional mapping with SN74ALVC16244 (octal buffer) and SN74ALVC16373 (16-bit latch) within TI's Widebus™ family - enabling drop-in substitution in existing layouts where function matches, provided direction-control and clocking logic are adapted accordingly.
SN74ALVC16245DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
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- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
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- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
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SN74ALVC16245DGGR FAQ
1.How can I place an order for SN74ALVC16245DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVC16245DGGR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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5.How can I obtain technical support or documentation for SN74ALVC16245DGGR?
For technical support, including SN74ALVC16245DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC16245DGGR requirements.
6.How does Aetrix verify that SN74ALVC16245DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ALVC16245DGGR 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 SN74ALVC16245DGGR meets industry standards.
7.What is the process for return or replacement of SN74ALVC16245DGGR?
All SN74ALVC16245DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC16245DGGR, 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 SN74ALVC16245DGGR part is unused and in its original packaging.
Return procedure for SN74ALVC16245DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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