My Inquiry
My Account
Texas Instruments 74AVCBH164245ZQLR
- Part No.:
- 74AVCBH164245ZQLR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVCBH164245ZQLR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,688
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AVCBH164245ZQLR from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation, supporting 1.4 V to 3.6 V on both A- and B-ports independently. It provides bidirectional data flow controlled by DIR inputs, 3-state outputs enabled via OE, and dynamic output control (DOC™) for noise reduction without speed penalty. It is used in mixed-voltage system interconnects such as FPGA-to-ASIC or SoC-to-memory interfaces.
For engineers reviewing the 74AVCBH164245ZQLR datasheet, 74AVCBH164245ZQLR pinout, 74AVCBH164245ZQLR application, or 74AVCBH164245ZQLR equivalent, key selection criteria include dual-rail voltage flexibility (1.4–3.6 V), Ioff partial-power-down support, bus-hold circuitry eliminating external resistors, and guaranteed 3.1 ns minimum propagation delay at 3.3 V operation.
Technical Context
The 74AVCBH164245ZQLR implements a dual-octal architecture with two independent 8-bit sections (1DIR/1OE and 2DIR/2OE), each supporting asynchronous bidirectional translation between mismatched voltage domains. Its control inputs (DIR, OE) are referenced to VCCB, while data ports track their respective supplies (VCCA for A-port, VCCB for B-port).
Dynamic Output Control (DOC™) circuitry actively modulates output impedance during signal transitions-initially lowering it for strong drive (±24 mA at 2.5 V), then raising it to suppress ringing. Bus-hold circuitry maintains valid logic levels on unused inputs, and Ioff protection disables outputs when either VCC is at GND, preventing backflow current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.4 V to 3.6 V each - enables translation between 1.5 V, 1.8 V, 2.5 V, and 3.3 V logic domains without level-shifter ICs. |
| tpd (max) | 7.6 ns at 1.8 V → 1.8 V - ensures timing compliance in high-speed low-voltage interconnects like DDR memory buffers. |
| IOL / IOH | ±12 mA at 3.0 V - delivers standard-output drive strength while maintaining low-voltage compatibility. |
| Bus-hold Current | ±75 µA at 3.0 V - actively sustains input logic states without pull-up/down resistors, reducing BOM count and board space. |
| Ioff Leakage | ±10 µA at 0 V supply - prevents damaging current flow during partial power-down, critical for hot-swap and power-gated systems. |
| ESD Rating | 2000-V HBM - meets industrial-grade robustness requirements for handling and assembly environments. |
Pinout & Package
VFBGA package (ZQL), 56-ball grid array, 0.5 mm pitch, 7.0 mm × 4.5 mm footprint, 1.0 mm max height. RoHS-compliant, Pb-free, MSL Level-3 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Determines data flow direction per 8-bit section: L = B→A, H = A→B; referenced to VCCB. |
| 1OE, 2OE | Output enable input (active-low) | Disables corresponding 8-bit port into high-impedance state; tied to VCCB via pullup for power-up safety. |
| VCCA, VCCB | Independent supply rails | VCCA powers A-port I/O; VCCB powers B-port I/O and all control inputs - enables true dual-voltage operation. |
| 1A1–1A8, 2A1–2A8 | A-port data terminals | Connect to lower-voltage domain (e.g., 1.8 V FPGA I/O); track VCCA; include bus-hold on all inputs. |
| 1B1–1B8, 2B1–2B8 | B-port data terminals | Connect to higher-voltage domain (e.g., 3.3 V peripheral bus); track VCCB; overvoltage-tolerant up to 4.6 V. |
| GND | Ground reference | Multiple dedicated GND balls (12 total) minimize ground bounce and improve signal integrity in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dual-rail operation | Independent 1.4–3.6 V supply ranges per port allow seamless interface between heterogeneous voltage domains without external translators. |
| Dynamic Output Control (DOC™) | Real-time impedance modulation reduces simultaneous switching noise by >30% vs fixed-drive transceivers while preserving edge rate and timing margin. |
| Integrated bus-hold circuitry | Eliminates need for 16 external pullup/pulldown resistors - saves PCB area, reduces assembly cost, and avoids routing congestion. |
| Ioff partial-power-down support | Guarantees high-impedance outputs when either VCCA or VCCB = 0 V, enabling safe insertion/removal in live-backplane or modular systems. |
| Overvoltage-tolerant I/O | B-port pins withstand up to 4.6 V regardless of VCCB setting - supports legacy 5 V-tolerant peripherals on 3.3 V rails without clamping diodes. |
Applications
| High-Speed FPGA-to-ASIC Interconnect | Low-Power Microcontroller Peripheral Bridge |
|---|---|
|
Use Scenario: Bidirectional data exchange between a 1.8 V FPGA bank and a 2.5 V ASIC subsystem in an industrial controller. IC Role / Device Role / Timing Role: Voltage-translating bus transceiver managing 16-bit parallel address/data bus with DIR-controlled direction and OE-gated isolation. Use Value: Eliminates discrete level shifters; DOC™ ensures clean edges at 100+ MHz clock rates; bus-hold prevents floating inputs during configuration handshaking. |
Use Scenario: Connecting a 3.3 V ARM Cortex-M7 MCU to multiple 1.5 V or 1.8 V sensor clusters in a battery-powered IoT gateway. IC Role / Device Role / Timing Role: Dual-rail translator enabling shared bus access across mixed-voltage sensors while minimizing standby current via Ioff. Use Value: Reduces system-level power by 180 µA per unused input vs resistor-based hold; supports fast wake-from-sleep transitions without input glitches. |
| DDR Memory Interface Buffer | Hot-Swappable Module Backplane Interface |
|
Use Scenario: Isolating and translating command/address signals between a 2.5 V memory controller and 1.5 V DDR3 SDRAM in telecom baseband hardware. IC Role / Device Role / Timing Role: Low-skew, low-noise transceiver providing 3.1 ns min tpd and matched rise/fall times for timing-critical control lines. Use Value: DOC™ lowers ΔI/Δt-induced supply noise by 40%, improving DDR timing margin; 1.4 V minimum VCC enables future DDR4/LPDDR5 migration paths. |
Use Scenario: Enabling hot-plug capability for field-replaceable compute modules in a 3U VPX chassis with mixed 1.8 V and 3.3 V backplane signaling. IC Role / Device Role / Timing Role: Fault-isolated bus interface that enters high-Z when module VCC is absent, preventing backfeeding into powered slots. Use Value: Ioff compliance guarantees <±10 µA leakage during insertion/removal; dual-rail design accommodates legacy and next-gen module voltage profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245ZRGR | Single-supply (1.2–3.6 V), no VCCA/VCCB separation; lacks bus-hold; higher ICC active current (40 µA vs 20 µA typical). | Suitable only when both sides share same rail; cannot translate between disparate voltages like 1.8 V ↔ 3.3 V. | Select only if system uses unified low-voltage domain and board space allows external hold resistors. |
| TXB0108PWR | Auto-direction sensing (no DIR pin); 8-bit only; lower drive (±2 mA); no DOC™ or bus-hold; supports 1.2–3.6 V but not dual-rail independent control. | Best for simple unidirectional or auto-sensed I²C/SPI bridges; insufficient for high-speed parallel bus isolation with precise direction control. | Choose for low-pin-count, low-speed digital interfaces where direction is predictable and noise immunity is secondary. |
Compared with SN74AVCH16T245ZRGR and TXB0108PWR, the 74AVCBH164245ZQLR uniquely delivers independent dual-rail translation, integrated bus-hold, and DOC™-enabled noise suppression - making it the only option among the three qualified for high-speed, mixed-voltage, direction-controlled parallel buses in industrial and telecom infrastructure.
Availability
74AVCBH164245ZQLR is available at Aetrix Electronics and suitable for high-reliability industrial control, telecom infrastructure, and embedded computing applications requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long product lifecycles.
Supply support for 74AVCBH164245ZQLR 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 expertise in logic interface solutions and industrial-grade reliability.
The 74AVCBH164245ZQLR belongs to TI's Widebus™ family of advanced bus interface devices, designed specifically for low-voltage, high-speed, mixed-domain system interconnects in demanding industrial, automotive, and communications equipment.
FAQ
What voltage ranges does the 74AVCBH164245ZQLR support on its A-port and B-port?
The 74AVCBH164245ZQLR supports independent supply voltages from 1.4 V to 3.6 V on both VCCA (A-port) and VCCB (B-port). This allows translation between common logic families including 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains. The control inputs (DIR, OE) are referenced to VCCB, and all I/O pins tolerate up to 4.6 V regardless of supply setting - confirmed in the Absolute Maximum Ratings table of the SCES393B datasheet.
Does the 74AVCBH164245ZQLR require external pull-up or pull-down resistors on data inputs?
No, the 74AVCBH164245ZQLR includes active bus-hold circuitry on all data inputs (1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8), which maintains valid logic states without external resistors. TI explicitly advises against using pullups/pulldowns with this feature, as they may interfere with bus-hold operation. This eliminates 16 passive components per device and improves signal integrity in high-density layouts.
How does Dynamic Output Control (DOC™) improve signal integrity in the 74AVCBH164245ZQLR?
DOC™ dynamically adjusts output impedance during signal transitions: initially lowering it to deliver full drive strength (±24 mA at 2.5 V), then raising it mid-transition to suppress ringing and overshoot. This reduces simultaneous switching noise by up to 40% compared to fixed-drive transceivers while preserving propagation delay and edge rate - verified via VOH/VOL vs. IOH/IOL curves in Figure 1 of the SCES393B datasheet.
What happens to the 74AVCBH164245ZQLR outputs when one supply rail is powered down?
When either VCCA or VCCB is at GND, the 74AVCBH164245ZQLR automatically places both A- and B-ports into high-impedance state due to its Ioff circuitry. This prevents backflow current and protects powered circuitry - a requirement for partial-power-down compliance per JESD78 Class II. Measured Ioff leakage is ±10 µA maximum, ensuring safe hot-swap and modular system operation.
Is the 74AVCBH164245ZQLR pin-compatible with other packages in the SN74AVCBH164245 family?
No - the 74AVCBH164245ZQLR uses the 56-ball VFBGA (ZQL) package, while SN74AVCBH164245GR uses TSSOP-48 and SN74AVCBH164245VR uses TVSOP-48. Pinouts differ significantly: ZQL has dedicated ball assignments per function (e.g., NC on A1–A5), whereas DGG/DGV use linear 48-pin layouts. Board redesign is required when substituting between these packages; no mechanical or electrical pin compatibility exists.
74AVCBH164245ZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCBH
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 1.4 V ~ 3.6 V
- Voltage - VCCB:
- 1.4 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VFBGA
74AVCBH164245ZQLR FAQ
1.How can I place an order for 74AVCBH164245ZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVCBH164245ZQLR 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 74AVCBH164245ZQLR reliable?
The price and inventory of 74AVCBH164245ZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCBH164245ZQLR is usually 5 days.
3.What payment methods are accepted for 74AVCBH164245ZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCBH164245ZQLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVCBH164245ZQLR?
74AVCBH164245ZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVCBH164245ZQLR 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 74AVCBH164245ZQLR?
For technical support, including 74AVCBH164245ZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCBH164245ZQLR requirements.
6.How does Aetrix verify that 74AVCBH164245ZQLR is sourced from the original manufacturer or authorized distributors?
All 74AVCBH164245ZQLR 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 74AVCBH164245ZQLR meets industry standards.
7.What is the process for return or replacement of 74AVCBH164245ZQLR?
All 74AVCBH164245ZQLR units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCBH164245ZQLR, 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 74AVCBH164245ZQLR part is unused and in its original packaging.
Return procedure for 74AVCBH164245ZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AVCBH164245ZQLR Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
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…
