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Texas Instruments CLVTH16646IDGGREP

Name: CLVTH16646IDGGREP
Brand: Texas Instruments
SKU: CLVTH16646IDGGREP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CLVTH16646IDGGREP

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-TFSOP (0.240", 6.10mm Width)

Datasheet:: CLVTH16646IDGGREP.pdf

Description:: IC TXRX NON-INVERT 3.6V 56TSSOP

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Product details

Overview

CLVTH16646IDGGREP from Texas Instruments is a 16-bit advanced BiCMOS bus transceiver supporting mixed-mode 3.3-V V_CC operation with 5-V tolerant inputs/outputs, 150-MHz clock frequency, ±100 µA I_off, and bus-hold on all data inputs - used in voltage-level-translating backplane interfaces between 3.3-V logic and legacy 5-V subsystems.

For engineers reviewing the CLVTH16646IDGGREP datasheet, CLVTH16646IDGGREP pinout, CLVTH16646IDGGREP application, or CLVTH16646IDGGREP equivalent, key selection criteria include hot-insertion support via I_off and power-up 3-state, real-time/stored data multiplexing via SAB/SBA controls, flowthrough PCB layout optimization, and TSSOP-56 package compatibility with high-density interconnect requirements.

Technical Context

The CLVTH16646IDGGREP implements dual 8-bit or single 16-bit bidirectional data transfer using separate CLKAB/CLKBA clock domains for A→B and B→A paths, with DIR-controlled directionality and OE-gated output enable/disable. It integrates independent storage registers per bus side to retain data during isolation.

Its ABT (Advanced BiCMOS Technology) architecture enables 2.7–3.6-V V_CC operation while maintaining TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V) and 5.5-V absolute max input voltage - allowing direct connection to 5-V buses without level shifters. Bus-hold circuitry eliminates external pull resistors on floating A/B port pins.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated battery supply down to 2.7 V without functional degradation
Max Clock Frequency	150 MHz - enables high-throughput data transfer in backplane and memory interface applications
I_off	±100 µA at V_CC = 0 - prevents damaging current backflow during hot insertion or partial power-down
t_PLH/t_PHL (CLK→Data)	1.3–4.7 ns - ensures tight timing margins for synchronous bus arbitration and latch alignment
Bus-Hold Current	±500 µA at V_CC = 3.6 V - actively maintains valid logic state on unused A/B inputs without external components
Output Drive	I_OL = 64 mA / I_OH = −32 mA - drives standard TTL loads and sustains signal integrity across 50-pF trace capacitance
ESD Rating	>2000 V HBM - meets MIL-STD-883 requirement for robust handling in manufacturing and field environments

Pinout & Package

CLVTH16646IDGGREP is housed in a 56-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 12.5 mm × 6.1 mm footprint, 1.2 mm max height, with gull-wing leads and RoHS-compliant CU-NiPdAu finish (MSL Level-1).

Pin/Terminal	Circuit Role	Design Meaning
1DIR, 2DIR	Direction control (per 8-bit section)	Determines data flow direction (A→B or B→A) when OE is low; independent control per half-device
1OE, 2OE	Output enable (per 8-bit section)	Places corresponding A/B outputs in high-impedance state when high; enables real-time or stored transfer when low
1CLKAB, 2CLKAB	A→B clock input	Latches A-bus data into register on low-to-high transition; triggers real-time or stored transfer to B bus
1CLKBA, 2CLKBA	B→A clock input	Latches B-bus data into register on low-to-high transition; triggers real-time or stored transfer to A bus
1SAB, 2SAB	A→B select control	Chooses between real-time A data (SAB = L) or stored A data (SAB = H) routed to B bus
1SBA, 2SBA	B→A select control	Chooses between real-time B data (SBA = L) or stored B data (SBA = H) routed to A bus
A1–A8, B1–B8 (×2 sections)	Data I/O terminals	Bi-directional 16-bit data ports with bus-hold; electrically isolated when OE high but retain input functionality
V_CC, GND (×8 each)	Power distribution	Distributed V_CC/GND pins minimize simultaneous switching noise and improve high-speed signal integrity

Key Features

Feature	Design Value
Mixed-mode voltage interface	3.3-V core with 5-V tolerant I/O allows seamless integration between modern low-voltage logic and legacy 5-V systems without external level shifters
Hot-insertion support	I_off and power-up 3-state eliminate bus contention and backdrive damage during live board replacement in telecom and server backplanes
Flowthrough architecture	Input and output pins aligned on opposite sides of package reduce layer count and trace crossovers in dense PCB layouts
Dual-register storage	Independent A-side and B-side registers enable concurrent capture and hold of data from both buses for arbitration or buffering
Glitch-free multiplexing	SAB/SBA control logic prevents decoding glitches during transitions between real-time and stored data modes - critical for deterministic bus arbitration

Applications

Backplane Interface	Memory Subsystem Bridge
Use Scenario: Interfacing a 3.3-V FPGA-based control module to a legacy 5-V VMEbus or ISA backplane. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver with clock-synchronized data latching and direction control. Use Value: Eliminates discrete level shifters and pull resistors while enabling reliable 150-MHz data exchange between mismatched voltage domains.	Use Scenario: Connecting a 3.3-V microcontroller to a 5-V SRAM or EPROM memory bank in industrial controller firmware update path. IC Role / Device Role / Timing Role: Direction-controlled, register-staged data buffer with bus-hold protection against floating address/data lines. Use Value: Prevents memory corruption during reset or brownout by holding valid bus states and enabling glitch-free read/write handshaking.
Hot-Swappable Module Hub	Test Equipment Signal Router
Use Scenario: Data aggregation node in modular test rack where daughter cards are inserted/removed under power. IC Role / Device Role / Timing Role: Isolation-capable transceiver with I_off-enabled safe insertion and dual-register storage for status snapshotting. Use Value: Guarantees zero bus contention during card swap and preserves last-known system state for diagnostic continuity.	Use Scenario: Reconfigurable signal path in automated test equipment routing DUT I/O between multiple instrument channels. IC Role / Device Role / Timing Role: Multiplexed bus manager selecting between live sensor inputs and preloaded calibration patterns stored in internal registers. Use Value: Enables real-time vs. stored pattern switching without external logic, reducing test sequence latency and hardware complexity.

Backplane Interface

Memory Subsystem Bridge

Use Scenario: Interfacing a 3.3-V FPGA-based control module to a legacy 5-V VMEbus or ISA backplane.

IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver with clock-synchronized data latching and direction control.

Use Value: Eliminates discrete level shifters and pull resistors while enabling reliable 150-MHz data exchange between mismatched voltage domains.

Use Scenario: Connecting a 3.3-V microcontroller to a 5-V SRAM or EPROM memory bank in industrial controller firmware update path.

IC Role / Device Role / Timing Role: Direction-controlled, register-staged data buffer with bus-hold protection against floating address/data lines.

Use Value: Prevents memory corruption during reset or brownout by holding valid bus states and enabling glitch-free read/write handshaking.

Hot-Swappable Module Hub

Test Equipment Signal Router

Use Scenario: Data aggregation node in modular test rack where daughter cards are inserted/removed under power.

IC Role / Device Role / Timing Role: Isolation-capable transceiver with I_off-enabled safe insertion and dual-register storage for status snapshotting.

Use Value: Guarantees zero bus contention during card swap and preserves last-known system state for diagnostic continuity.

Use Scenario: Reconfigurable signal path in automated test equipment routing DUT I/O between multiple instrument channels.

IC Role / Device Role / Timing Role: Multiplexed bus manager selecting between live sensor inputs and preloaded calibration patterns stored in internal registers.

Use Value: Enables real-time vs. stored pattern switching without external logic, reducing test sequence latency and hardware complexity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16646DGGR	Lower drive strength (I_OL = 24 mA), no bus-hold, 1.65–3.6-V V_CC, no 5-V tolerance	Restricted to 3.3-V-only systems; requires external pull resistors; unsuitable for mixed-voltage backplanes	Select only for cost-sensitive, single-supply 3.3-V designs where voltage translation and hot-swap are not required.
SN74ALVCH16646DL	Higher speed (200 MHz f_max), 2.3–3.6-V V_CC, no 5-V tolerance, no I_off	Not rated for hot insertion; incompatible with 5-V buses; requires strict 2.3-V min supply	Choose when maximum throughput in pure 3.3-V environments outweighs mixed-voltage and hot-swap capability.

Compared with SN74LVC16646DGGR and SN74ALVCH16646DL, CLVTH16646IDGGREP uniquely combines 5-V I/O tolerance, I_off-based hot-insertion safety, and integrated bus-hold - making it the only option among the three qualified for legacy-system upgrades and live-backplane deployments.

Availability

CLVTH16646IDGGREP is available at Aetrix Electronics and suitable for backplane interfacing, memory subsystem bridging, hot-swappable module hubs, and test equipment signal routing requiring stable component supply across extended temperature ranges (−40°C to 85°C) and long-lifecycle programs.

Supply support for CLVTH16646IDGGREP 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 logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The CLVTH16646IDGGREP belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-speed, mixed-voltage, hot-pluggable system interconnects in telecom infrastructure, industrial automation, and test instrumentation.

FAQ

What voltage levels does CLVTH16646IDGGREP support on its I/O ports?

CLVTH16646IDGGREP supports 5-V tolerant inputs and outputs while operating from a 2.7–3.6-V V_CC. Its absolute maximum input voltage is 7 V, and it guarantees TTL-compatible thresholds (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V) - enabling direct connection to 5-V buses without external level-shifting circuitry. This capability is intrinsic to the CLVTH16646IDGGREP device architecture and verified across its full operating temperature range.

Does CLVTH16646IDGGREP support hot insertion, and how is it implemented?

Yes, CLVTH16646IDGGREP supports hot insertion via two integrated features: I_off circuitry disables outputs when V_CC = 0, preventing damaging current backflow, and power-up 3-state holds outputs in high-impedance until V_CC stabilizes above 1.5 V. These mechanisms are silicon-proven per JESD78 and documented in the CLVTH16646IDGGREP datasheet Section 6 - ensuring safe live-board replacement in telecom and server applications.

How does the bus-hold feature work on CLVTH16646IDGGREP, and what design benefit does it provide?

The CLVTH16646IDGGREP integrates active bus-hold circuitry on all A- and B-port data inputs, drawing up to ±500 µA to maintain a valid logic state when inputs float. This eliminates the need for external pullup/pulldown resistors, reduces BOM count, improves signal integrity in unterminated stubs, and prevents metastability in high-noise industrial environments - a confirmed behavior specified in the CLVTH16646IDGGREP electrical characteristics table.

Can CLVTH16646IDGGREP operate with an unregulated 3.3-V supply dropping to 2.7 V?

Yes, CLVTH16646IDGGREP is fully specified from 2.7 V to 3.6 V V_CC, including timing, drive strength, and logic thresholds. Its ABT process technology ensures stable operation down to 2.7 V - supporting unregulated battery-powered systems. All parameters in the CLVTH16646IDGGREP recommended operating conditions table (Section 5) are guaranteed across this range, with no derating required.

What is the function of the SAB and SBA pins on CLVTH16646IDGGREP?

The SAB (Select A→B) and SBA (Select B→A) pins control multiplexing between real-time and stored data paths: SAB = L routes live A-bus data to B-bus; SAB = H routes previously latched A-data from the register. Identical logic applies to SBA for B→A transfer. This glitch-free select architecture - confirmed in the CLVTH16646IDGGREP functional table and Figure 1 - enables deterministic bus arbitration without external logic.

CLVTH16646IDGGREP Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

Package/Case:: 56-TFSOP (0.240", 6.10mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

CLVTH16646IDGGREP FAQ

1.How can I place an order for CLVTH16646IDGGREP through Aetrix?

Please submit a Request for Quotation (RFQ) for CLVTH16646IDGGREP 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 CLVTH16646IDGGREP reliable?

The price and inventory of CLVTH16646IDGGREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CLVTH16646IDGGREP is usually 5 days.

3.What payment methods are accepted for CLVTH16646IDGGREP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CLVTH16646IDGGREP transactions.

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4.How is shipping managed for CLVTH16646IDGGREP?

CLVTH16646IDGGREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CLVTH16646IDGGREP 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 CLVTH16646IDGGREP?

For technical support, including CLVTH16646IDGGREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CLVTH16646IDGGREP requirements.

6.How does Aetrix verify that CLVTH16646IDGGREP is sourced from the original manufacturer or authorized distributors?

All CLVTH16646IDGGREP 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 CLVTH16646IDGGREP meets industry standards.

7.What is the process for return or replacement of CLVTH16646IDGGREP?

All CLVTH16646IDGGREP units undergo pre-shipment inspection (PSI). If there is an issue with CLVTH16646IDGGREP, 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 CLVTH16646IDGGREP part is unused and in its original packaging.

Return procedure for CLVTH16646IDGGREP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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