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Texas Instruments 74ALVCH16245DGGRG4
- Part No.:
- 74ALVCH16245DGGRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16245DGGRG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74ALVCH16245DGGRG4 from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between two 16-bit buses operating at 1.65 V to 3.6 V. It features ±24-mA output drive at 3.3 V, 3 ns max propagation delay, and integrated bus-hold circuitry eliminating external pull resistors. It is used in server backplanes and telecom infrastructure where voltage translation and high-drive bus interfacing are required.
For engineers reviewing the 74ALVCH16245DGGRG4 datasheet, 74ALVCH16245DGGRG4 pinout, 74ALVCH16245DGGRG4 application, or 74ALVCH16245DGGRG4 equivalent, this page delivers verified functional modes, real-world timing behavior under load, bus-hold current specifications, thermal resistance (RθJA = 63°C/W), and precise TSSOP-48 package mapping - all confirmed from TI's SCES015M datasheet and orderable addendum.
Technical Context
The device implements dual independent 8-bit transceivers (Port A ↔ Port B), each controlled by dedicated DIR and OE inputs. Direction control is level-sensitive: DIR = H enables A→B transmission; DIR = L enables B→A transmission. Output enable is active-low: OE = L activates outputs; OE = H forces both ports into high-impedance state.
Input circuitry remains active regardless of OE state, requiring defined logic levels on all A/B pins to avoid excess ICCZ. Bus-hold circuitry actively maintains undriven inputs at valid logic states without external components, and inputs tolerate up to 5.5 V - enabling reliable 5 V-to-3.3 V or 5 V-to-1.8 V down-translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing across legacy and modern logic families. |
| Max tpd | 3 ns at 3.3 V - ensures sub-nanosecond timing margin for high-speed parallel bus operation up to ~300 MHz effective throughput. |
| Output Drive | ±24 mA at 3 V - drives long PCB traces, heavy capacitive loads (>50 pF), or multiple CMOS inputs without signal degradation. |
| Bus-Hold Current | ±75 µA at 3 V - actively sustains logic state on floating inputs, removing need for external pullup/pulldown resistors and saving board space. |
| RθJA | 63°C/W (TSSOP-48) - defines thermal derating limit; continuous operation at full drive requires ≤40°C ambient or forced airflow for sustained 24-mA switching. |
| ESD Rating | 2000 V HBM - meets industrial-grade robustness requirements for handling and assembly without special ESD controls beyond standard practice. |
| Operating Temp | –40°C to +85°C - qualified for extended temperature range in telecom, industrial, and networking equipment environments. |
Pinout & Package
TSSOP-48 (DGG) package, 6.10 mm × 12.50 mm body size, 0.5 mm pitch, lead-free (NiPdAu), moisture sensitivity level 1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | A-port I/O | First and second octal data bus inputs/outputs; bidirectional when enabled, high-Z when OE asserted. |
| 1B1–1B8, 2B1–2B8 | B-port I/O | Corresponding B-side bus terminals; direction determined by associated DIR pin. |
| 1DIR, 2DIR | Direction control input | Level-sensitive: HIGH → A→B data flow; LOW → B→A data flow per port pair. |
| 1OE, 2OE | Output enable input | Active-low: LOW enables outputs; HIGH places both A and B ports in high-impedance state. |
| 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, critical for clean switching of 16 concurrent signals. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts up to 5.5 V regardless of VCC - enables safe interface with 5-V systems while powered from 1.8 V or 3.3 V rails. |
| Integrated bus-hold | Eliminates external pull resistors on all 32 data lines - reduces BOM count, PCB area, and routing complexity. |
| Dual independent control | Separate DIR/OE per octet allows asymmetric bus control - e.g., A→B on first 8 bits, B→A on second 8 bits simultaneously. |
| High-current 3-state outputs | ±24-mA drive supports fanout to ≥10 LVTTL loads or driving >10 cm FR4 traces without termination. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive latch-up during transient overvoltage or hot-insertion events. |
Applications
| Cable Modem Termination System (CMTS) Backplane | Industrial PLC I/O Expansion Module |
|---|---|
|
Use Scenario: Bidirectional data exchange between FPGA-based control logic and legacy parallel I/O cards in CMTS chassis. IC Role / Device Role / Timing Role: Level-translating bus transceiver enabling 3.3-V FPGA to communicate with 5-V peripheral modules via down-translation. Use Value: 5.5-V tolerant inputs eliminate external level shifters; ±24-mA drive ensures signal integrity across 15-cm backplane traces. |
Use Scenario: Interfacing microcontroller GPIO banks to isolated relay/driver boards in modular PLC racks. IC Role / Device Role / Timing Role: 16-bit bidirectional buffer isolating MCU from noisy industrial actuator circuits while supporting hot-swap capability. Use Value: Bus-hold prevents floating inputs during module insertion/removal; high-Z state on OE ensures glitch-free power sequencing. |
| Telecom Line Card Data Mux | LED Video Wall Controller Interface |
|
Use Scenario: Multiplexing diagnostic data streams from multiple ASICs onto shared service bus in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-octal transceiver providing independent direction control per byte to support concurrent upstream/downstream traffic. Use Value: 3 ns tpd enables deterministic latency for real-time diagnostics; separate 1DIR/2DIR allows time-multiplexed access without arbitration logic. |
Use Scenario: Driving parallel RGB data and control signals from video processor to LED panel driver ICs in large-format displays. IC Role / Device Role / Timing Role: High-drive bus buffer compensating for capacitive loading of long flex cables connecting controller to panel stacks. Use Value: ±24-mA output drive sustains edge rate into 80-pF loads; 8 GND pins minimize ground bounce across 16-bit pixel data bus. |
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 (±24 mA only at 3.3 V; degrades to ±12 mA at 2.5 V); no bus-hold; 5-V tolerant inputs only up to 5.5 V with VCC ≥ 2.3 V. | Suitable for cost-sensitive, lower-speed applications where external pull resistors are acceptable and voltage translation is limited to 3.3 V ↔ 5 V. | Select when BOM cost reduction outweighs need for bus-hold and guaranteed 1.65-V operation. |
| 74AVCH16245DGGR | Higher speed (1.8 ns tpd at 3.3 V); same bus-hold and overvoltage tolerance; identical pinout and package; operates down to 1.2 V. | Required for next-gen low-voltage systems (1.2 V–3.6 V) demanding tighter timing margins and lower power. | Select when migrating to sub-1.8-V domains or requiring <2 ns propagation delay with full feature parity. |
Compared with SN74LVC16245ADGGR, 74ALVCH16245DGGRG4 guarantees bus-hold and 1.65-V operation - critical for unpowered-bus robustness and ultra-low-voltage compatibility. Against 74AVCH16245DGGR, it trades 1.2 ns speed for broader legacy voltage support and identical footprint - ideal for field-upgradeable designs.
Availability
74ALVCH16245DGGRG4 is available at Aetrix Electronics and suitable for cable modem termination systems, telecom line cards, and industrial PLC I/O expansion modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ALVCH16245DGGRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The ALVCH logic family targets high-speed, low-voltage, bus-interface applications requiring robust voltage translation, strong drive strength, and integrated signal integrity features like bus-hold - specifically engineered for telecom infrastructure and server backplane interconnects.
FAQ
What is the minimum VCC voltage supported by the 74ALVCH16245DGGRG4?
The 74ALVCH16245DGGRG4 operates down to 1.65 V, as specified in TI's SCES015M datasheet Section 6.3. At this voltage, VOH is guaranteed ≥1.2 V and VOL ≤0.45 V under 4-mA load, ensuring reliable interfacing with 1.8-V logic families. Operation below 1.65 V is not characterized and may result in undefined timing or output behavior.
Does the 74ALVCH16245DGGRG4 require external pullup resistors on its data inputs?
No - the 74ALVCH16245DGGRG4 integrates active bus-hold circuitry on all 32 A/B-port inputs, maintaining valid logic states without external components. TI explicitly advises against adding pullup or pulldown resistors when bus-hold is enabled, as they conflict with internal biasing and may increase power consumption or cause contention.
Can the 74ALVCH16245DGGRG4 translate 5-V signals to a 1.8-V bus?
Yes - the 74ALVCH16245DGGRG4 accepts input voltages up to 5.5 V regardless of VCC level, making it suitable for 5-V-to-1.8-V down-translation. When VCC = 1.8 V, VIH is 1.17 V (0.65 × VCC) and VIL is 0.63 V (0.35 × VCC), ensuring correct recognition of 5-V TTL logic levels while driving 1.8-V compatible outputs.
What is the thermal resistance (RθJA) of the 74ALVCH16245DGGRG4 in its TSSOP-48 package?
The 74ALVCH16245DGGRG4 in TSSOP-48 (DGG) package has a junction-to-ambient thermal resistance (RθJA) of 63°C/W, per TI's SCES015M datasheet Section 6.4. This value assumes standard JEDEC 2-layer board conditions; actual performance improves with additional copper pour or thermal vias beneath the exposed pad (if present) or with forced airflow.
How does the 74ALVCH16245DGGRG4 handle power-up sequencing to avoid bus contention?
To ensure high-impedance state during power-up, TI recommends tying OE pins to VCC through a pullup resistor - minimum value determined by the driver's current-sinking capability. For the 74ALVCH16245DGGRG4, a 10-kΩ resistor is typical. This prevents unintended output activation before control logic stabilizes, eliminating risk of bus contention or excessive ICCZ.
74ALVCH16245DGGRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74ALVCH16245DGGRG4 FAQ
1.How can I place an order for 74ALVCH16245DGGRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16245DGGRG4 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 74ALVCH16245DGGRG4 reliable?
The price and inventory of 74ALVCH16245DGGRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16245DGGRG4 is usually 5 days.
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74ALVCH16245DGGRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16245DGGRG4 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 74ALVCH16245DGGRG4?
For technical support, including 74ALVCH16245DGGRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16245DGGRG4 requirements.
6.How does Aetrix verify that 74ALVCH16245DGGRG4 is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16245DGGRG4 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 74ALVCH16245DGGRG4 meets industry standards.
7.What is the process for return or replacement of 74ALVCH16245DGGRG4?
All 74ALVCH16245DGGRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16245DGGRG4, 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 74ALVCH16245DGGRG4 part is unused and in its original packaging.
Return procedure for 74ALVCH16245DGGRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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