My Inquiry
My Account
Texas Instruments SN74LVCH16540ADGVR
- Part No.:
- SN74LVCH16540ADGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCH16540ADGVR.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,364
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCH16540ADGVR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation in wide-bus data-path interfaces. It features dual 8-bit sections, each with independent active-low 2-input AND-gated output-enable (OE1/OE2), bus-hold on all inputs, Ioff partial-power-down support, and 5.5-V-tolerant inputs-enabling mixed-mode 3.3-V/5-V signal translation in industrial control backplanes.
For engineers reviewing the SN74LVCH16540ADGVR datasheet, SN74LVCH16540ADGVR pinout, SN74LVCH16540ADGVR application, or SN74LVCH16540ADGVR equivalent, this device is selected for high-speed, low-voltage bus interfacing where input voltage tolerance, bus-hold stability, and controlled 3-state enable timing are critical design requirements.
Technical Context
The SN74LVCH16540ADGVR implements two independent 8-bit noninverting buffer sections, each with separate OE1/OE2 control logic forming a 2-input AND gate (active-low) to drive corresponding Y outputs into high-impedance when either OE is high. Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external resistors.
It supports partial-power-down via Ioff, which disables outputs and blocks current backflow when VCC = 0 V, and accepts input voltages up to 5.5 V regardless of VCC (1.65–3.6 V), enabling robust level-shifting between 5-V legacy peripherals and 3.3-V logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables direct integration into modern low-voltage FPGA/CPU I/O banks without level-shifters. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe connection to 5-V TTL or CMOS sources in mixed-voltage systems. |
| Max Propagation Delay | 3.7 ns at VCC = 3.3 V - Supports >200 MHz bus toggle rates in high-throughput data paths. |
| Ioff Current | ±10 µA at VCC = 0 V - Prevents damaging back-current during hot-insertion or staggered power sequencing. |
| Bus-Hold Input Current | ±45 µA at VCC = 2.3 V - Maintains stable logic state on floating inputs without pull-up/down resistors. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - Drives 15-pF loads across 10-cm PCB traces while meeting setup/hold margins. |
| ESD Protection | 2000-V HBM, 1000-V CDM - Meets industrial-grade reliability requirements per JESD22. |
Pinout & Package
SN74LVCH16540ADGVR uses a 48-pin TVSOP (DGV) package, 6.1 mm × 12.5 mm body, 0.4 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Active-low 2-input AND enable control | Either OE high forces corresponding 8-bit Y outputs into high-Z; enables independent section gating. |
| 1A1–1A8, 2A1–2A8 | Data inputs | Noninverting inputs for each 8-bit section; feature bus-hold and 5.5-V tolerance. |
| 1Y1–1Y8, 2Y1–2Y8 | 3-state buffered outputs | Drive external buses; high-Z when enabled off; VOL ≤ 0.55 V at 24 mA ensures noise margin. |
| VCC (Pins 7, 18, 29, 40) | Power supply | Four dedicated VCC pins reduce IR drop and improve switching noise immunity across wide bus. |
| GND (Pins 4, 11, 22, 33, 44) | Ground reference | Five GND pins provide low-inductance return paths for simultaneous switching outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal translation | 5.5-V-tolerant inputs operate reliably with 3.3-V VCC, eliminating discrete level shifters in 3.3/5-V interconnects. |
| Bus-hold circuitry | Actively holds unused A-inputs at last-valid logic state, removing need for 10-kΩ external pull resistors and saving board space. |
| Ioff partial-power-down | Blocks current flow from powered sections into unpowered VCC domains, supporting hot-swap and power-gating architectures. |
| Low ground bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - Reduces simultaneous switching noise coupling into analog or clock domains. |
| High noise immunity | VIH = 2.0 V / VIL = 0.8 V at VCC = 3.3 V - Provides ≥0.7 V DC noise margin against EMI in industrial environments. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Interfacing 5-V PLC modules to a 3.3-V FPGA-based controller in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional 16-bit bus buffer translating 5-V address/data signals to 3.3-V FPGA I/O while maintaining timing integrity. Use Value: Eliminates four discrete level shifters and eight pull-up resistors, reducing BOM cost and layout area by 32%. |
Use Scenario: Extending limited FPGA GPIO count to drive multiple peripheral ICs on a compact embedded test board. IC Role / Device Role / Timing Role: Noninverting 3-state driver enabling time-multiplexed access to shared memory-mapped peripherals. Use Value: 3.7-ns tpd ensures setup/hold compliance at 100-MHz bus clocks; bus-hold prevents glitches during reconfiguration. |
| Hot-Swappable Module Carrier | Mixed-Voltage Sensor Hub |
Use Scenario: Powering down individual daughterboards in telecom line cards without disrupting main system bus. IC Role / Device Role / Timing Role: Isolation buffer with Ioff and controlled 3-state enable, preventing backfeed during insertion/removal. Use Value: ±10 µA Ioff limits fault current to safe levels; dual OE control allows graceful shutdown of one section while keeping other active. |
Use Scenario: Aggregating 5-V analog sensor outputs and 3.3-V digital sensors onto a single MCU data bus. IC Role / Device Role / Timing Role: Input-tolerant buffer normalizing voltage levels before ADC sampling or digital polling. Use Value: 5.5-V input rating accepts direct 5-V sensor outputs; bus-hold stabilizes idle lines during low-duty-cycle polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower drive (±24 mA @ 3.3 V vs. ±24 mA @ 3.0 V); no bus-hold; 1.65–3.6 V only; inputs not 5.5-V tolerant. | Suitable only in fully 3.3-V systems with external pull resistors; cannot replace SN74LVCH16540ADGVR in mixed-voltage designs. | Select when cost is prioritized over voltage flexibility and bus-hold; requires redesign of input termination. |
| 74ALVC164245DGGR | Bidirectional with direction control; 4.5-V max VCC; 5.5-V input tolerance retained; higher tpd (5.2 ns). | Used where data flow reverses (e.g., memory read/write); adds direction pin complexity and timing overhead. | Choose only if bidirectional operation is mandatory; otherwise SN74LVCH16540ADGVR offers superior unidirectional speed and simplicity. |
Compared with SN74LVC16244ADGGR and 74ALVC164245DGGR, the SN74LVCH16540ADGVR uniquely combines 5.5-V input tolerance, integrated bus-hold, and sub-4-ns propagation delay in a unidirectional 16-bit buffer-making it irreplaceable in mixed-voltage industrial backplanes requiring zero external biasing and minimal timing margin loss.
Availability
SN74LVCH16540ADGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, hot-swappable module carriers, and mixed-voltage sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCH16540ADGVR 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions, with leadership in industrial, automotive, and communications markets since 1930.
The SN74LVCH16540ADGVR belongs to TI's Widebus™ family of high-speed, low-voltage logic devices engineered specifically for wide-data-path buffering and level translation in industrial control, telecom infrastructure, and programmable logic interconnect applications.
FAQ
What is the maximum operating frequency supported by the SN74LVCH16540ADGVR?
The SN74LVCH16540ADGVR has a maximum propagation delay (tpd) of 3.7 ns at VCC = 3.3 V, corresponding to a theoretical maximum toggle frequency of approximately 135 MHz under ideal load conditions. Real-world bus operation typically sustains 80–100 MHz with 15-pF loads and proper termination, as confirmed by TI's switching characteristics table in SCAS569H.
Does the SN74LVCH16540ADGVR require external pull-up or pull-down resistors on its inputs?
No, the SN74LVCH16540ADGVR includes active bus-hold circuitry on all A-inputs, which maintains the last-valid logic state without external resistors. TI explicitly warns against using pull-up/pull-down resistors with bus-hold enabled, as they may conflict with internal holding current and cause undefined behavior or increased power draw.
Can the SN74LVCH16540ADGVR be used in hot-swap applications?
Yes, the SN74LVCH16540ADGVR supports hot-swap via its Ioff feature: when VCC = 0 V, Ioff limits current flow to ±10 µA, preventing damaging back-current from live buses into unpowered sections. This is validated in TI's Absolute Maximum Ratings and Electrical Characteristics tables under Ioff test conditions.
What is the recommended power-up sequence for the SN74LVCH16540ADGVR to ensure high-impedance outputs at startup?
To guarantee outputs remain in high-impedance during power-up, TI recommends tying OE1 and OE2 to VCC through pullup resistors. The minimum resistor value depends on the driver's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ, ensuring OE stays low until VCC stabilizes above 1.65 V.
Is the SN74LVCH16540ADGVR pin-compatible with other 48-pin Widebus™ buffers like the SN74LVCH16244A?
No, the SN74LVCH16540ADGVR is not pin-compatible with SN74LVCH16244A. While both use 48-pin TSSOP/TVSOP packages, their pinouts differ significantly: SN74LVCH16540ADGVR has dual 8-bit sections with four OE pins and interleaved A/Y/GND/VCC placement, whereas SN74LVCH16244A uses a single 16-bit configuration with two OE pins and different terminal mapping per TI package drawings DGG/DGV.
SN74LVCH16540ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, 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-TVSOP
SN74LVCH16540ADGVR FAQ
1.How can I place an order for SN74LVCH16540ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16540ADGVR 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 SN74LVCH16540ADGVR reliable?
The price and inventory of SN74LVCH16540ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16540ADGVR is usually 5 days.
3.What payment methods are accepted for SN74LVCH16540ADGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCH16540ADGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCH16540ADGVR?
SN74LVCH16540ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH16540ADGVR 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 SN74LVCH16540ADGVR?
For technical support, including SN74LVCH16540ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16540ADGVR requirements.
6.How does Aetrix verify that SN74LVCH16540ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16540ADGVR 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 SN74LVCH16540ADGVR meets industry standards.
7.What is the process for return or replacement of SN74LVCH16540ADGVR?
All SN74LVCH16540ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16540ADGVR, 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 SN74LVCH16540ADGVR part is unused and in its original packaging.
Return procedure for SN74LVCH16540ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCH16540ADGVR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
