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Texas Instruments SN74ACT16245QDLREP
- Part No.:
- SN74ACT16245QDLREP
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ACT16245QDLREP.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,408
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Product details
Overview
SN74ACT16245QDLREP from Texas Instruments is a radiation-hardened, high-reliability 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in harsh-environment systems. It operates from 4.5 V to 5.5 V, supports –40°C to +125°C extended temperature range, and delivers ±16 mA output drive at 5 V with propagation delays as low as 2.6 ns (tPHL). It is used in aerospace avionics data bus isolation and onboard telemetry interface modules.
For engineers reviewing the SN74ACT16245QDLREP datasheet, SN74ACT16245QDLREP pinout, SN74ACT16245QDLREP application, or SN74ACT16245QDLREP equivalent, key selection considerations include its EP-grade qualification (JEDEC HAST, temp cycle, bias 85/85), SSOP-48 package with distributed VCC/GND pins for noise suppression, flow-through pin architecture for PCB layout optimization, and TTL-voltage-compatible inputs enabling direct interfacing with legacy logic families.
Technical Context
The SN74ACT16245QDLREP implements two independent 8-bit transceiver sections, each controlled by dedicated DIR (direction) and G (output enable) inputs. Direction control determines data flow-low DIR enables B→A transmission, high DIR enables A→B transmission-while asserting G disables all outputs into high-impedance state for bus isolation.
Its ACT logic family ensures TTL-level input compatibility (VIH = 2 V min, VIL = 0.8 V max) and CMOS-level output swing (VOH ≥ 3.94 V at IOH = –16 mA, VOL ≤ 0.5 V at IOL = 16 mA). Distributed power/ground pins and flow-through pinout minimize simultaneous switching noise and reduce trace crossovers on high-speed PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across industrial and aerospace power rail tolerances. |
| Operating Temperature | –40°C to +125°C - Qualified per JEDEC standards for extended-life deployment in engine bays and space-grade electronics. |
| Output Drive | ±16 mA at 5 V - Sufficient to directly drive 50-pF bus loads without external buffers in MIL-STD-1553 or ARINC-429 auxiliary interfaces. |
| Propagation Delay | tPHL = 2.6 ns (min), tPLH = 3.2 ns (min) - Enables sub-100 MHz synchronous bus handshaking in real-time control subsystems. |
| Input Compatibility | TTL-voltage compatible (VIH ≥ 2 V, VIL ≤ 0.8 V) - Allows seamless integration with legacy 74LS/74ALS logic without level-shifting circuitry. |
| 3-State Leakage | IOZ = ±10 µA max - Guarantees robust bus isolation during standby, critical for fault-tolerant redundant data paths. |
| Power Dissipation Cap. | Cpd = 10 pF (outputs disabled) - Reduces dynamic power in quiescent mode, supporting low-duty-cycle telemetry burst transmission. |
Pinout & Package
SN74ACT16245QDLREP uses a 48-pin SSOP (Shrink Small-Outline Package) with 0.5-mm pitch, JEDEC MO-118 compliant, moisture sensitivity level 1 (260°C peak reflow), and RoHS-compliant NiPdAu lead finish. Package dimensions: 11.35 mm × 16.2 mm × 2.79 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Logic level selects data flow direction: DIR = L → B-to-A; DIR = H → A-to-B. |
| 1G, 2G | Output enable input (per 8-bit section) | Active-low; G = L enables outputs, G = H forces all associated outputs to high-impedance. |
| 1A1–1A8, 2A1–2A8 | Port A input/output terminals | Connect to source bus (e.g., microcontroller data bus); bidirectional when enabled. |
| 1B1–1B8, 2B1–2B8 | Port B input/output terminals | Connect to destination bus (e.g., memory or peripheral bus); bidirectional when enabled. |
| VCC (pins 7, 18, 29, 40) | Power supply | Distributed VCC pins reduce IR drop and supply noise coupling across 16-bit path. |
| GND (pins 4, 11, 16, 23, 27, 34, 39, 46) | Ground reference | Eight GND pins provide low-inductance return paths, critical for EMI control in mixed-signal avionics. |
Key Features
| Feature | Design Value |
|---|---|
| Controlled Baseline Manufacturing | Single assembly/test site and single fabrication site ensure lot-to-lot consistency for long-lifecycle programs. |
| Flow-Through Pin Architecture | Input and output pins aligned on opposite sides of package to eliminate layer jumps and reduce signal crosstalk on dense PCBs. |
| Distributed VCC/GND Pins | Four VCC and eight GND pins suppress ground bounce and supply rail collapse during simultaneous 16-bit switching. |
| Enhanced DMS Support | Diminishing Manufacturing Sources mitigation extends supply continuity for defense and satellite programs beyond standard commercial obsolescence timelines. |
| EP-Qualified Reliability | Qualified to JEDEC JESD22-A108 (HAST), JESD22-A104 (temp cycle), and JESD22-A110 (biased 85/85) for >15-year field life in mission-critical systems. |
Applications
| Aerospace Data Bus Interface | Avionics Sensor Aggregation |
|---|---|
Use Scenario: Bidirectional data exchange between flight computer and modular mission payload units via isolated LVDS or parallel backplane. IC Role / Device Role / Timing Role: Bus transceiver providing galvanically isolated, direction-controlled data routing between heterogeneous subsystems. Use Value: Enables deterministic latency (≤11.5 ns max tPLH) and noise-immune operation under vibration and thermal cycling in airborne environments. |
Use Scenario: Consolidating analog sensor readings (via ADCs) and discrete status signals from multiple engine-monitoring modules onto a central health management unit. IC Role / Device Role / Timing Role: Level-translating and bus-isolating transceiver that bridges TTL-compatible sensor outputs to 5-V microcontroller data bus. Use Value: TTL-compatible inputs eliminate external level shifters; 3-state outputs prevent bus contention during hot-swap sensor module replacement. |
| Satellite Onboard Telemetry | Defense Vehicle Control Network |
Use Scenario: Transmitting housekeeping telemetry (voltage, temperature, attitude) from distributed remote terminal units (RTUs) to the main command processor over a radiation-hardened parallel bus. IC Role / Device Role / Timing Role: Radiation-tolerant bidirectional buffer ensuring data integrity across long interconnects in low-power burst-mode operation. Use Value: Low dynamic power (Cpd = 10 pF disabled) extends battery life; EP qualification ensures latch-up immunity in proton-rich orbital environments. |
Use Scenario: Interfacing ruggedized COTS processors with legacy vehicle subsystems (hydraulics, navigation, comms) using shared 16-bit address/data multiplexed buses. IC Role / Device Role / Timing Role: High-drive bus transceiver enabling reliable communication across noisy, high-EMI vehicle chassis wiring harnesses. Use Value: ±16 mA drive sustains signal integrity over 15 cm traces; distributed GND pins suppress common-mode noise induced by motor drives and RF transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH16245ADLR | Lower voltage operation (2.7–3.6 V), LVTH logic family, not EP-qualified; max TA = 85°C. | Targeted at commercial/industrial portable equipment, not space or military platforms. | Select only if operating voltage is <4.5 V and radiation/temperature qualification is unnecessary. |
| SN74ACT16245DGGR | Same ACT logic and pinout, but commercial-grade (–40°C to 85°C), no EP reliability pedigree or DMS support. | Suitable for terrestrial industrial automation where extended temperature and long-term supply are not required. | Choose for cost-sensitive prototyping or non-mission-critical systems with shorter lifecycle expectations. |
Compared with SN74ACT16245QDLREP, SN74LVTH16245ADLR offers lower power at reduced voltage but lacks radiation hardening and extended temperature capability, while SN74ACT16245DGGR shares identical logic performance but omits JEDEC-qualified reliability testing and DMS continuity planning-making SN74ACT16245QDLREP the sole choice for flight-critical or 15+ year deployed systems.
Availability
SN74ACT16245QDLREP is available at Aetrix Electronics and suitable for aerospace avionics interfaces, satellite telemetry subsystems, and defense vehicle control networks requiring stable component supply across multi-decade production programs.
Supply support for SN74ACT16245QDLREP 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 high-reliability components for industrial, automotive, and aerospace markets.
The SN74ACT16245QDLREP belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, low-latency bidirectional data transfer in mission-critical electronic systems operating under extreme environmental stress.
FAQ
What is the maximum operating temperature range supported by the SN74ACT16245QDLREP?
The SN74ACT16245QDLREP is qualified for continuous operation from –40°C to +125°C. This extended temperature range is validated per JEDEC JESD22-A104 (temperature cycling) and JESD22-A110 (biased 85/85), making it suitable for engine-mounted avionics, satellite power systems, and other high-stress environments where commercial-grade parts would fail.
Does the SN74ACT16245QDLREP support TTL-level input signals?
Yes, the SN74ACT16245QDLREP features TTL-voltage-compatible inputs with VIH(min) = 2.0 V and VIL(max) = 0.8 V at VCC = 4.5 V to 5.5 V. This allows direct connection to legacy 74LS, 74ALS, and other TTL-family devices without external level-shifting circuitry-critical for maintaining backward compatibility in upgraded avionics platforms.
How many independent transceiver sections does the SN74ACT16245QDLREP contain?
The SN74ACT16245QDLREP contains two independent 8-bit transceiver sections (Section 1: pins 1DIR/1G/1A1–1A8/1B1–1B8; Section 2: pins 2DIR/2G/2A1–2A8/2B1–2B8), each with dedicated direction and output-enable controls. This dual-section architecture enables concurrent bidirectional data transfers across separate bus domains within a single 48-pin SSOP package.
What is the purpose of the distributed VCC and GND pins on the SN74ACT16245QDLREP?
The SN74ACT16245QDLREP incorporates four VCC pins (7, 18, 29, 40) and eight GND pins (4, 11, 16, 23, 27, 34, 39, 46) to minimize simultaneous switching noise and supply rail collapse during full 16-bit transitions. This distributed power/ground topology reduces impedance in high-frequency return paths, improving signal integrity and EMI performance in high-reliability PCB layouts.
Is the SN74ACT16245QDLREP pin-compatible with any commercial-grade variants?
Yes, the SN74ACT16245QDLREP is pin-compatible with the commercial SN74ACT16245DGGR (TSSOP-48) and SN74ACT16245ADGGR (TSSOP-48), sharing identical pin functions and electrical behavior. However, SN74ACT16245QDLREP differs in its SSOP-48 package, EP reliability qualification, and extended temperature rating-requiring careful thermal and mechanical validation when substituting in existing designs.
SN74ACT16245QDLREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 16mA, 16mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ACT16245QDLREP FAQ
1.How can I place an order for SN74ACT16245QDLREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT16245QDLREP 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 SN74ACT16245QDLREP reliable?
The price and inventory of SN74ACT16245QDLREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT16245QDLREP is usually 5 days.
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SN74ACT16245QDLREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT16245QDLREP 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 SN74ACT16245QDLREP?
For technical support, including SN74ACT16245QDLREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT16245QDLREP requirements.
6.How does Aetrix verify that SN74ACT16245QDLREP is sourced from the original manufacturer or authorized distributors?
All SN74ACT16245QDLREP 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 SN74ACT16245QDLREP meets industry standards.
7.What is the process for return or replacement of SN74ACT16245QDLREP?
All SN74ACT16245QDLREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT16245QDLREP, 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 SN74ACT16245QDLREP part is unused and in its original packaging.
Return procedure for SN74ACT16245QDLREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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