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Texas Instruments SN74AVCH8T245PW
- Part No.:
- SN74AVCH8T245PW
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVCH8T245PW.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
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Product details
Overview
SN74AVCH8T245PW from Texas Instruments is an 8-bit dual-supply noninverting bus transceiver enabling bidirectional voltage translation between 1.2V–3.6V domains (e.g., 1.8V ↔ 3.3V), with bus-hold inputs, Ioff partial-power-down support, and VCC isolation. It operates across –40°C to 85°C and delivers up to 320Mbps data rate when both supplies ≥1.8V.
For engineers reviewing the SN74AVCH8T245PW datasheet, SN74AVCH8T245PW pinout, SN74AVCH8T245PW application, or SN74AVCH8T245PW equivalent, this page provides verified electrical specs, TSSOP-24 package details, level-shifting design guidance, and validated alternative options for mixed-voltage interface design.
Technical Context
The SN74AVCH8T245PW implements fully configurable dual-rail architecture: A-port I/Os and control inputs (DIR, OE) reference VCCA (1.2V–3.6V); B-port I/Os reference VCCB (1.2V–3.6V). Control logic is tied exclusively to VCCA, ensuring consistent direction and enable behavior regardless of VCCB level.
Its VCC isolation feature forces outputs into high-impedance when either VCCA or VCCB = GND, while powered-side bus-hold remains active. Ioff circuitry limits current backflow during partial power-down, and 4.6-V tolerant I/Os support overvoltage resilience on both ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 1.2V to 3.6V each - enables universal translation among 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains |
| Max Data Rate | 320Mbps - achievable only when both VCCA ≥1.8V and VCCB ≥1.8V; drops to 170Mbps if either supply ≤1.8V |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage systems without external clamping |
| Bus-Hold Current (IBHL / IBHH) | ±25μA to ±100μA - actively holds unused inputs at valid logic levels, eliminating need for external pull resistors |
| Ioff Leakage | ±0.1μA typical - prevents damaging back-current flow when one supply is powered down |
| ESD Protection | ±8000V HBM, ±200V MM, ±1000V CDM - exceeds JEDEC standards for robust handling in manufacturing and field use |
| Propagation Delay (tPLH/tPHL) | 0.5ns to 6.8ns - varies by supply combination; minimum 0.5ns typical at VCCA=1.5V/VCCB=1.8V |
Pinout & Package
TSSOP-24 (PW) package: 7.8 mm × 6.4 mm body, 0.65 mm lead pitch, surface-mount, thermally enhanced with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply rail | References A1–A8, DIR, and OE; sets input thresholds and output drive strength for A side |
| VCCB | B-port supply rail | References B1–B8; independent of VCCA, enabling true bidirectional level shifting |
| DIR | Direction control input | High = A→B data flow; low = B→A; referenced to VCCA, not VCCB |
| OE | Output-enable input | Low = transceiver active; high = all A/B outputs in 3-state; referenced to VCCA |
| A1–A8 | A-port bidirectional I/Os | Each connects to VCCA domain; include bus-hold; tolerate up to 4.6V |
| B1–B8 | B-port bidirectional I/Os | Each connects to VCCB domain; include bus-hold; tolerate up to 4.6V |
| GND (pins 11,12,13) | Ground reference | Common return for both supply domains; three pins reduce ground bounce in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2V–3.6V supplies on A and B ports enable interoperability across five standard logic families without external components |
| Integrated bus-hold circuitry | Eliminates need for external pullup/pulldown resistors on A1–A8 and B1–B8, reducing BOM count and board space |
| VCC isolation | Outputs automatically enter high-Z when either VCCA or VCCB = GND - critical for hot-swap and power sequencing safety |
| Ioff partial-power-down support | Prevents current backflow from live port to unpowered port, protecting downstream circuitry during asymmetric power states |
| 4.6-V tolerant I/Os | Allows direct connection to legacy 3.3V or 5V systems without level-shifter buffers or series resistors |
Applications
| Industrial PLC I/O Modules | Enterprise SSD Controller Interfaces |
|---|---|
Use Scenario: Interfacing a 1.8V FPGA I/O bank to a 3.3V industrial sensor bus with strict ESD and hot-swap requirements. IC Role / Device Role / Timing Role: Bidirectional level translator managing data and status signals between mismatched voltage domains. Use Value: VCC isolation ensures safe power sequencing; 4.6V tolerance protects against sensor bus transients; bus-hold prevents floating inputs during configuration. |
Use Scenario: Connecting a 1.2V NVMe controller to a 1.8V DRAM buffer in enterprise SSDs requiring low-latency, high-reliability signaling. IC Role / Device Role / Timing Role: High-speed bidirectional data path translator supporting >300Mbps throughput with sub-3ns propagation delay. Use Value: 320Mbps capability meets PCIe Gen3 timing budgets; Ioff prevents leakage during controller sleep states; compact TSSOP-24 fits dense memory subsystem layouts. |
| Telecom Baseband Processing | Personal Electronics Power Management |
Use Scenario: Level-shifting control signals between a 2.5V baseband processor and 1.5V RF transceiver in 4G/5G small cell equipment. IC Role / Device Role / Timing Role: Asynchronous bidirectional translator for GPIO, reset, and interrupt lines with precise timing control. Use Value: DIR/OE referenced to VCCA simplifies control logic design; ±8000V HBM withstands telecom-grade ESD events; thermal resistance (93.1°C/W) supports convection-cooled enclosures. |
Use Scenario: Enabling communication between a 3.3V PMIC and 1.2V SoC core in smartphones, where power sequencing and leakage must be tightly controlled. IC Role / Device Role / Timing Role: Voltage-domain bridge for power-status, fault-reporting, and configuration signals. Use Value: Ioff and VCC isolation prevent battery drain during deep-sleep modes; bus-hold maintains signal integrity during SoC reset transitions; 1.2V operation minimizes dynamic power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC8T245PW | Single-supply only (1.65V–3.6V); no VCC isolation; lower ESD (±2kV HBM); max 240Mbps | Suitable for fixed-voltage systems without partial-power-down needs; lacks dual-rail flexibility | Select when cost sensitivity outweighs mixed-voltage and hot-swap requirements |
| TXB0108PWR | Auto-direction sensing (no DIR pin); higher quiescent current; 3.6V max VCC; no bus-hold | Better for simple uni-directional or auto-sensing paths; less suitable for deterministic DIR-controlled buses | Choose when direction is inferred from data flow, not controlled externally |
Compared with SN74LVC8T245PW and TXB0108PWR, the SN74AVCH8T245PW uniquely combines dual-rail independence, VCC isolation, bus-hold, and 320Mbps performance-making it the only option for robust, high-speed, mixed-voltage industrial and telecom interfaces requiring guaranteed power sequencing safety.
Availability
SN74AVCH8T245PW is available at Aetrix Electronics and suitable for industrial PLC I/O modules, enterprise SSD controller interfaces, and telecom baseband processing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74AVCH8T245PW 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 and embedded processing solutions, with decades of expertise in logic, interface, and power management ICs.
The SN74AVCH8T245PW belongs to TI's AVC logic family, engineered specifically for high-speed, low-voltage bidirectional level translation in mixed-supply systems where reliability, ESD robustness, and power sequencing safety are critical.
FAQ
What voltage ranges does the SN74AVCH8T245PW support on its A and B ports?
The SN74AVCH8T245PW supports independent supply voltages from 1.2V to 3.6V on both VCCA (A port) and VCCB (B port), enabling translation between any pair of standard logic nodes including 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. This range is explicitly specified in the Recommended Operating Conditions table of the SN74AVCH8T245PW datasheet.
How does the SN74AVCH8T245PW handle power sequencing when one supply is off?
The SN74AVCH8T245PW implements VCC isolation: if either VCCA or VCCB is at GND, all outputs enter high-impedance state automatically. Bus-hold remains active on the powered side, preventing floating inputs. This behavior is intrinsic to the SN74AVCH8T245PW silicon design and requires no external circuitry.
Does the SN74AVCH8T245PW require external pull-up or pull-down resistors?
No. The SN74AVCH8T245PW integrates bus-hold circuitry on all A1–A8 and B1–B8 pins, which actively maintains unused inputs at valid logic levels. TI explicitly states that external pull resistors are unnecessary-and not recommended-when bus-hold is enabled, as confirmed in the SN74AVCH8T245PW datasheet Feature Description section.
What is the maximum data rate supported by the SN74AVCH8T245PW?
The SN74AVCH8T245PW supports up to 320Mbps when both VCCA ≥1.8V and VCCB ≥1.8V. If either supply is ≤1.8V, the maximum rated speed drops to 170Mbps. These values are measured under defined load and transition conditions and appear in the SN74AVCH8T245PW datasheet's Features table and Switching Characteristics sections.
Is the SN74AVCH8T245PW pin-compatible with other '245-family devices in TSSOP-24?
No. While the SN74AVCH8T245PW uses the same PW (TSSOP-24) package footprint as some other '245 devices, its pin functions differ significantly - notably DIR and OE are referenced to VCCA (not VCCB), and GND is assigned to three pins (11,12,13). Direct substitution with SN74LVC8T245PW or SN74ALVC8T245PW is not electrically safe without layout verification.
SN74AVCH8T245PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCH
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
SN74AVCH8T245PW FAQ
1.How can I place an order for SN74AVCH8T245PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCH8T245PW 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 SN74AVCH8T245PW reliable?
The price and inventory of SN74AVCH8T245PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCH8T245PW is usually 5 days.
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SN74AVCH8T245PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCH8T245PW 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 SN74AVCH8T245PW?
For technical support, including SN74AVCH8T245PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCH8T245PW requirements.
6.How does Aetrix verify that SN74AVCH8T245PW is sourced from the original manufacturer or authorized distributors?
All SN74AVCH8T245PW 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 SN74AVCH8T245PW meets industry standards.
7.What is the process for return or replacement of SN74AVCH8T245PW?
All SN74AVCH8T245PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCH8T245PW, 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 SN74AVCH8T245PW part is unused and in its original packaging.
Return procedure for SN74AVCH8T245PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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