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Texas Instruments 74LVCHR162245ADLG4
- Part No.:
- 74LVCHR162245ADLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74LVCHR162245ADLG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,724
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Product details
Overview
74LVCHR162245ADLG4 from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between voltage domains. It operates from 1.65 V to 3.6 V, accepts 5.5-V-tolerant inputs, and delivers 4.8 ns max propagation delay at 3.3 V - enabling use in mixed-voltage telecom infrastructure and industrial transport systems.
For engineers reviewing the 74LVCHR162245ADLG4 datasheet, 74LVCHR162245ADLG4 pinout, 74LVCHR162245ADLG4 application, or 74LVCHR162245ADLG4 equivalent, key selection criteria include its Ioff-enabled live insertion support, integrated 26-Ω output series resistors, bus-hold on all data I/Os, and SSOP-48 package compatibility with legacy 16-bit bus isolation layouts.
Technical Context
This device implements two independent 8-bit transceiver channels (A↔B), each controlled by dedicated DIR and OE pins - enabling simultaneous or segregated direction control. Its CMOS-based input structure supports 5.5-V overvoltage tolerance across all A/B port pins regardless of VCC, while the Ioff circuitry ensures back-drive protection during partial power-down.
The internal bus-hold circuit actively maintains valid logic states on floating data inputs without external resistors, and all outputs integrate matched 26-Ω series termination to suppress overshoot/undershoot - eliminating need for discrete damping components in high-speed 3.3-V bus interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables operation across low-voltage embedded rails including 1.8 V, 2.5 V, and 3.3 V systems |
| Input Voltage Tolerance | Up to 5.5 V - allows direct interfacing with 5-V logic without level shifters in mixed-supply environments |
| Max Propagation Delay | 4.8 ns at VCC = 3.3 V - supports >100 MHz data rates in point-to-point or lightly loaded bus topologies |
| Output Drive Strength | ±12 mA per pin - sufficient to drive standard 50-Ω transmission lines or multiple CMOS loads |
| Ioff Current | ±10 µA at VI/VO = 5.5 V and VCC = 0 V - prevents damaging current flow during hot-swap or staggered power sequencing |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively sustains logic state on unconnected A/B port pins without pull resistors |
| ESD Rating | 2000-V HBM - meets industrial-grade robustness requirements for board-level handling and field deployment |
Pinout & Package
74LVCHR162245ADLG4 is packaged in a 48-pin SSOP (DL) with 0.635-mm lead pitch and 15.88 mm × 7.49 mm body size - compatible with standard surface-mount assembly processes and legacy footprint designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per channel: DIR = L enables B→A; DIR = H enables A→B |
| 1OE, 2OE | Output enable input | Active-low control: OE = L enables transceiver; OE = H places both A and B ports in high-impedance state |
| 1A1–1A8, 2A1–2A8 | Data I/O port A | 8-bit bidirectional data interface for first transceiver channel; includes bus-hold and 5.5-V tolerance |
| 1B1–1B8, 2B1–2B8 | Data I/O port B | 8-bit bidirectional data interface for second transceiver channel; identical electrical specs to port A |
| 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 for all I/Os and support stable switching margins |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage translation | 5.5-V-tolerant inputs operate reliably with 1.65–3.6-V VCC - eliminates external level shifters in 3.3-V/5-V system bridges |
| Integrated output termination | 26-Ω series resistors on all outputs suppress ringing and EMI without requiring PCB trace matching or discrete components |
| Live-insertion support | Ioff functionality limits current to ±10 µA when VCC = 0 V - enables safe hot-plug operation in modular backplane systems |
| Self-biasing bus-hold | Active hold circuit maintains last-valid logic state on unused A/B pins - removes need for external pullup/pulldown resistors and saves board space |
| Low-noise switching | Typical VOLP < 0.8 V and VOHV > 2 V at VCC = 3.3 V - minimizes ground bounce and supply rail disturbance in dense logic layouts |
Applications
| Telecom Infrastructure Backplanes | Industrial Transport Control Modules |
|---|---|
Use Scenario: Isolating processor-side control buses from field I/O expansion slots in carrier-grade routers. IC Role / Device Role / Timing Role: Bidirectional 16-bit bus transceiver enabling synchronous configuration reads/writes between 3.3-V SoC and 5-V peripheral modules. Use Value: 5.5-V input tolerance and Ioff allow safe hot-swap of line cards without system reset or power cycling. |
Use Scenario: Interfacing FPGA-based motion controllers with legacy 5-V encoder feedback networks in rail signaling systems. IC Role / Device Role / Timing Role: Voltage-translating bus buffer managing bidirectional position data exchange under EMI-prone industrial conditions. Use Value: Integrated 26-Ω output resistors and bus-hold eliminate external termination and pull resistors - reducing BOM count and improving layout reliability. |
| Wireless Base Station Radios | Servers and Storage Controllers |
Use Scenario: Level-shifting between 1.8-V RFIC digital control interfaces and 3.3-V baseband processor buses in massive MIMO antenna arrays. IC Role / Device Role / Timing Role: Low-skew, high-drive transceiver supporting burst-mode calibration data transfers with sub-5-ns timing margin. Use Value: 4.8 ns max tpd at 3.3 V and 12 mA drive ensure deterministic setup/hold timing across temperature range (–40°C to +85°C). |
Use Scenario: Buffering PCIe configuration space accesses between 3.3-V root complex and 5-V add-in card management controllers. IC Role / Device Role / Timing Role: Dual-channel isolated bus interface preventing signal contention during firmware updates and thermal throttling events. Use Value: Independent DIR/OE controls per channel allow selective isolation of memory-mapped registers without disrupting active data lanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVCHR16245AGR | TSSOP-48 package; rated for –40°C to +125°C operating range vs. DLG4's –40°C to +85°C | Suitable for extended-temperature industrial or automotive under-hood applications where thermal margin is critical | Select SN74LVCHR16245AGR when ambient operating temperature exceeds 85°C or when TSSOP footprint is preferred for higher-density routing |
| SN74LVC16245ADGGR | Lacks bus-hold and Ioff features; no 5.5-V input tolerance; only 3.6-V max VI rating | Lower-cost option for single-rail 3.3-V systems where voltage translation and hot-swap are not required | Choose SN74LVC16245ADGGR only in cost-sensitive, fixed-supply designs where 74LVCHR162245ADLG4's advanced features add no value |
Compared with SN74LVCHR16245AGR and SN74LVC16245ADGGR, the 74LVCHR162245ADLG4 uniquely combines 5.5-V input tolerance, bus-hold, Ioff, and SSOP-48 packaging - making it the only choice for mixed-voltage, hot-pluggable, or resistor-free bus isolation in commercial-temperature telecom and industrial systems.
Availability
74LVCHR162245ADLG4 is available at Aetrix Electronics and suitable for telecom infrastructure backplanes, industrial transport control modules, and wireless base station radios requiring stable component supply across extended production lifecycles.
Supply support for 74LVCHR162245ADLG4 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 experience delivering high-reliability logic and interface solutions for industrial and communications markets.
The LVCHR family was engineered specifically for robust, mixed-voltage bus bridging in telecom and industrial equipment - emphasizing voltage translation, live insertion, and simplified layout through integrated termination and bus-hold.
FAQ
What is the maximum input voltage the 74LVCHR162245ADLG4 can tolerate?
The 74LVCHR162245ADLG4 accepts input voltages up to 5.5 V on all A and B port pins, regardless of VCC level - enabling direct interfacing with 5-V logic in mixed-supply systems without external level shifters. This overvoltage tolerance is guaranteed across the full operating temperature range (–40°C to +85°C) and is independent of whether the device is powered or in a partial-power-down state.
Does the 74LVCHR162245ADLG4 support hot-swap or live insertion?
Yes, the 74LVCHR162245ADLG4 supports live insertion via its Ioff feature: when VCC = 0 V, leakage current is limited to ±10 µA even with 5.5-V signals applied to I/O pins. This prevents damaging back-current flow during hot-plug events in modular backplanes or field-replaceable units - a capability confirmed in TI's SCAS582Q datasheet Section 9.1 and Table 7.5.
What package type is used for the 74LVCHR162245ADLG4?
The 74LVCHR162245ADLG4 uses a 48-pin SSOP (Shrink Small Outline Package) with designation DL, measuring 15.88 mm × 7.49 mm. It is supplied in tape-and-reel format (1000 units per reel) and features NIPDAU lead finish with Moisture Sensitivity Level 1 (unlimited floor life at ≤30°C/60% RH), per TI's Packaging Information Addendum.
How does the bus-hold feature work on the 74LVCHR162245ADLG4?
The 74LVCHR162245ADLG4 integrates active bus-hold circuitry on all A and B port data pins - automatically maintaining the last-valid logic state when inputs float. This eliminates need for external pullup/pulldown resistors. Bus-hold current is ±75 µA at VCC = 3 V (per Table 7.5), and the feature remains active regardless of OE or DIR pin states.
Can the 74LVCHR162245ADLG4 be used as two independent 8-bit transceivers?
Yes, the 74LVCHR162245ADLG4 contains two fully independent 8-bit transceiver sections (Channels 1 and 2), each with dedicated DIR and OE pins (1DIR/1OE and 2DIR/2OE). This allows simultaneous bidirectional data transfer in different directions - for example, A→B on Channel 1 while B→A on Channel 2 - as defined in Table 3 (Function Table) of the SCAS582Q datasheet.
74LVCHR162245ADLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCHR
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74LVCHR162245ADLG4 FAQ
1.How can I place an order for 74LVCHR162245ADLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCHR162245ADLG4 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 74LVCHR162245ADLG4 reliable?
The price and inventory of 74LVCHR162245ADLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCHR162245ADLG4 is usually 5 days.
3.What payment methods are accepted for 74LVCHR162245ADLG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCHR162245ADLG4 transactions.
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4.How is shipping managed for 74LVCHR162245ADLG4?
74LVCHR162245ADLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCHR162245ADLG4 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 74LVCHR162245ADLG4?
For technical support, including 74LVCHR162245ADLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCHR162245ADLG4 requirements.
6.How does Aetrix verify that 74LVCHR162245ADLG4 is sourced from the original manufacturer or authorized distributors?
All 74LVCHR162245ADLG4 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 74LVCHR162245ADLG4 meets industry standards.
7.What is the process for return or replacement of 74LVCHR162245ADLG4?
All 74LVCHR162245ADLG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCHR162245ADLG4, 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 74LVCHR162245ADLG4 part is unused and in its original packaging.
Return procedure for 74LVCHR162245ADLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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