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Texas Instruments SN54SLC8T245PWTSEP
- Part No.:
- SN54SLC8T245PWTSEP
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN54SLC8T245PWTSEP.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN54SLC8T245PWTSEP from Texas Instruments is an 8-bit dual-supply non-inverting bus transceiver with configurable voltage translation, tri-state outputs, and radiation-hardened design for space applications. It supports bidirectional level shifting between 0.65 V and 3.6 V on independent A- and B-ports (VCCA/VCCB), operates from –55°C to +125°C, and delivers up to 380 Mbps when translating 1.8 V ↔ 3.3 V. It is used in low-earth-orbit satellite payloads for interfacing processors with sensor or power management blocks across mismatched voltage domains.
For engineers reviewing the SN54SLC8T245PWTSEP datasheet, SN54SLC8T245PWTSEP pinout, SN54SLC8T245PWTSEP application, or SN54SLC8T245PWTSEP equivalent, key selection criteria include SEL immunity (43 MeV·cm²/mg), TID RLAT qualification (20 krad(Si)), dual-direction-control capability (DIR1/DIR2), VCC isolation behavior, and partial-power-down Ioff support - all verified under space-grade test conditions.
Technical Context
The SN54SLC8T245PWTSEP implements asynchronous bidirectional voltage translation using two independent supply rails (VCCA and VCCB), each configurable from 0.65 V to 3.6 V. Its dual direction-control pins (DIR1, DIR2) enable simultaneous up-translation (A→B) and down-translation (B→A) on separate I/O banks (A1–A4 and A5–A8), requiring both supplies ≥1.40 V for concurrent operation.
All control inputs (DIR1, DIR2, OE) are referenced to VCCA, not VCCB. The device features VCC isolation (outputs disabled if either VCC < 100 mV) and Ioff circuitry that limits backflow current during partial power-down, with leakage specified ≤ ±55 µA per port when one rail is at 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 0.65 V to 3.6 V each - enables translation between legacy (3.3 V, 2.5 V) and advanced nodes (0.7 V, 0.8 V, 0.9 V). |
| Propagation Delay (A→B) | 2 ns typical at VCCA = VCCB = 3.3 V - supports high-speed interconnects in radar and comms subsystems. |
| SEL Immunity | Immune up to 43 MeV·cm²/mg at 125°C - qualified for single-event latch-up resilience in LEO radiation environments. |
| TID RLAT | 20 krad(Si) per wafer lot - radiation lot acceptance testing ensures consistent hardness across production batches. |
| Operating Temperature | –55°C to +125°C - fully specified for extreme thermal cycling in satellite payload bays and propulsion modules. |
| Ioff Current | ≤ ±55 µA per port at 0 V supply - prevents damaging backflow when one side is powered down during system sleep modes. |
| VCC Isolation Threshold | Outputs enter high-Z if either VCCA or VCCB < 100 mV - ensures safe bus isolation during brownout or sequencing faults. |
Pinout & Package
Packaged in a 24-pin TSSOP (PW), 7.8 mm × 6.4 mm, with exposed pad not electrically connected. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply reference | Supplies A-side I/Os (A1–A8) and control inputs (DIR1, DIR2, OE); sets VIH/VIL thresholds for controls. |
| DIR1 (Pin 2) | Direction control - Bank 1 | Configures A1–A4 ↔ B1–B4 data flow; referenced to VCCA; logic low enables B→A, high enables A→B. |
| A1–A8 (Pins 3–10) | A-port bidirectional I/O | Track VCCA; accept 0.65–3.6 V signals; tolerate overvoltage up to VCCA + 0.2 V in active state. |
| DIR2 (Pin 11) | Direction control - Bank 2 | Configures A5–A8 ↔ B5–B8; tied to GND for backward compatibility with SN74AVC8T245. |
| GND (Pins 12, 13) | Ground reference | Dual ground pins reduce impedance and improve noise immunity in high-reliability PCB layouts. |
| B8–B1 (Pins 14–21) | B-port bidirectional I/O | Track VCCB; accept 0.65–3.6 V signals; tolerate overvoltage up to VCCB + 0.2 V in active state. |
| OE (Pin 22) | Output enable | Active-low; referenced to VCCA; drives all A/B outputs to high-Z when high; pullup to VCCA ensures safe power-up state. |
| VCCB (Pins 23, 24) | B-port supply reference | Dual VCCB pins lower supply path impedance and support robust current delivery to B-side I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent direction controls (DIR1/DIR2) | Enables concurrent A→B and B→A translation on separate 4-bit banks - eliminates need for two discrete translators in mixed-voltage sensor interfaces. |
| VCC isolation | Automatically places all outputs in high-impedance state if either VCCA or VCCB drops below 100 mV - prevents bus contention during power sequencing faults. |
| Partial power-down (Ioff) | Limits leakage to ≤ ±55 µA when one supply rail is at 0 V - protects downstream devices from reverse current damage during sleep or fault recovery. |
| Radiation hardening | SEL immunity (43 MeV·cm²/mg) and TID RLAT (20 krad(Si)) tested per V62/22604 - meets NASA GSFC and ESA ESCC space-grade requirements. |
| ESD robustness | 8-kV HBM and 1-kV CDM protection - exceeds JESD22 standards for handling safety in cleanroom assembly and launch-site integration. |
Applications
| Space Satellite Payload Interface | LEO Radar Signal Processing |
|---|---|
|
Use Scenario: Interfacing a 0.8-V FPGA fabric with 3.3-V analog front-end ADCs and DACs in a compact satellite payload module. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling synchronous data exchange between low-power processing core and high-precision signal chain. Use Value: Eliminates level-shifter duplication by supporting simultaneous up- and down-translation across two independent 4-bit banks, reducing board area and radiation-sensitive component count. |
Use Scenario: Connecting a radiation-tolerant 1.2-V microcontroller to 2.5-V RF transceiver ICs and 3.3-V telemetry buffers in a phased-array radar subsystem. IC Role / Device Role / Timing Role: Asynchronous bus transceiver providing glitch-free voltage domain bridging with guaranteed timing margins across –55°C to +125°C. Use Value: VCC isolation and Ioff ensure no bus contention or leakage-induced latch-up during thermal cycling or partial power-down events common in orbital eclipse phases. |
| Onboard Spacecraft Sensor Hub | Deep-Space Communication Modem |
|
Use Scenario: Aggregating data from multiple heterogeneous sensors (0.7-V MEMS accelerometers, 1.8-V temperature monitors, 3.3-V pressure transducers) into a central 1.5-V data concentrator. IC Role / Device Role / Timing Role: Multi-rail translator resolving voltage mismatches while maintaining signal integrity at up to 380 Mbps in 1.8 V ↔ 3.3 V mode. Use Value: Dual-supply flexibility and radiation-hardened construction allow direct integration into sensor hub PCBs without external shielding or derating. |
Use Scenario: Bridging a 0.9-V cryptographic processor with 2.5-V SDR modem baseband ICs and 3.3-V RF power amplifiers in a Ka-band deep-space transponder. IC Role / Device Role / Timing Role: Radiation-tolerant bus transceiver ensuring deterministic latency and bus isolation during long-duration missions beyond Earth orbit. Use Value: SEL immunity and TID qualification guarantee uninterrupted operation in high-energy proton environments encountered beyond Van Allen belts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54SLC8T245FK | Military-grade (not space-qualified); no SEL immunity or TID RLAT testing; rated only to 125°C (no –55°C spec). | Suitable for ground-based defense systems but not certified for flight in LEO or deep space. | Select SN54SLC8T245PWTSEP when mission-critical radiation tolerance and extended temperature range are required. |
| SN74AVC8T245RHLR | Commercial grade; no radiation hardening; max operating temp +85°C; lacks VCC isolation and Ioff specs. | Valid for terrestrial industrial or telecom infrastructure where radiation and extreme temperature are non-concerns. | Choose SN54SLC8T245PWTSEP for space-qualified reliability; SN74AVC8T245RHLR only for cost-sensitive, non-radiation environments. |
Compared with SNJ54SLC8T245FK and SN74AVC8T245RHLR, the SN54SLC8T245PWTSEP uniquely provides flight-proven SEL immunity, per-lot TID RLAT, full –55°C to +125°C operation, and hardware-enforced VCC isolation - making it the sole option qualified for radiation-intensive space payload designs.
Availability
SN54SLC8T245PWTSEP is available at Aetrix Electronics and suitable for low-earth-orbit satellite payloads, space radar subsystems, and deep-space communication modems requiring stable component supply with guaranteed radiation performance and long-term obsolescence management.
Supply support for SN54SLC8T245PWTSEP 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 space-grade ICs, with decades of heritage in radiation-hardened component development for NASA and DoD programs.
The SN54SLC8T245PWTSEP belongs to TI's Space Enhanced Plastic (SEP) product line, engineered specifically for high-reliability space applications requiring SEL immunity, TID qualification, and extended temperature operation without hermetic packaging.
FAQ
What radiation-hardening specifications apply to the SN54SLC8T245PWTSEP?
The SN54SLC8T245PWTSEP is qualified per VID V62/22604 with single-event latch-up (SEL) immunity up to 43 MeV·cm²/mg at 125°C and total ionizing dose (TID) radiation lot acceptance testing (RLAT) to 20 krad(Si) for every wafer lot - verified through standardized heavy-ion and Co-60 irradiation protocols.
How does the SN54SLC8T245PWTSEP handle power sequencing between VCCA and VCCB?
The SN54SLC8T245PWTSEP incorporates VCC isolation: if either VCCA or VCCB falls below 100 mV, all outputs automatically enter high-impedance state. This prevents bus contention during asymmetric power-up/down sequences common in spacecraft power distribution networks.
Can the SN54SLC8T245PWTSEP perform simultaneous up- and down-translation?
Yes - the SN54SLC8T245PWTSEP uses DIR1 and DIR2 to independently configure A1–A4 and A5–A8 banks. When DIR1 = L and DIR2 = H, A1–A4 transmit B→A while A5–A8 transmit A→B, enabling true concurrent bidirectional translation - provided both VCCA and VCCB ≥ 1.40 V.
What is the maximum data rate supported by the SN54SLC8T245PWTSEP?
The SN54SLC8T245PWTSEP supports up to 380 Mbps when translating between 1.8 V and 3.3 V, with propagation delay as low as 2 ns (typical) under matched 3.3-V conditions - validated across –55°C to +125°C with full switching characterization tables in the datasheet.
Does the SN54SLC8T245PWTSEP require external pull-up resistors on control pins?
Yes - to ensure defined logic states during power-up/power-down, OE should be pulled up to VCCA via a resistor (value determined by driver sink strength), and DIR2 may be tied to GND for SN74AVC8T245 compatibility. Floating control inputs risk excessive current and undefined output states.
SN54SLC8T245PWTSEP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0.65V ~ 3.6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
SN54SLC8T245PWTSEP FAQ
1.How can I place an order for SN54SLC8T245PWTSEP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN54SLC8T245PWTSEP 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 SN54SLC8T245PWTSEP reliable?
The price and inventory of SN54SLC8T245PWTSEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54SLC8T245PWTSEP is usually 5 days.
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SN54SLC8T245PWTSEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN54SLC8T245PWTSEP 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 SN54SLC8T245PWTSEP?
For technical support, including SN54SLC8T245PWTSEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54SLC8T245PWTSEP requirements.
6.How does Aetrix verify that SN54SLC8T245PWTSEP is sourced from the original manufacturer or authorized distributors?
All SN54SLC8T245PWTSEP 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 SN54SLC8T245PWTSEP meets industry standards.
7.What is the process for return or replacement of SN54SLC8T245PWTSEP?
All SN54SLC8T245PWTSEP units undergo pre-shipment inspection (PSI). If there is an issue with SN54SLC8T245PWTSEP, 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 SN54SLC8T245PWTSEP part is unused and in its original packaging.
Return procedure for SN54SLC8T245PWTSEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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