My Inquiry
My Account
Texas Instruments SN74AHCT16245DLR
- Part No.:
- SN74AHCT16245DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHCT16245DLR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,710
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHCT16245DLR from Texas Instruments is a 16-bit dual-octal noninverting 3-state bus transceiver in SSOP-48 package, operating at 4.5–5.5 V, with 8 ns typical propagation delay (CL = 15 pF), ±8 mA output drive, and TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V). It enables bidirectional data flow between A and B buses in industrial control backplanes.
For engineers reviewing the SN74AHCT16245DLR datasheet, SN74AHCT16245DLR pinout, SN74AHCT16245DLR application, or SN74AHCT16245DLR equivalent, key selection factors include its dual-directional 3-state control per octet, -40°C to +125°C operating range, flow-through pinout for PCB routing optimization, and compatibility with 3.3 V logic driving 5 V buses.
Technical Context
The SN74AHCT16245DLR implements two independent 8-bit transceivers, each with dedicated DIR and OE controls (1DIR/1OE and 2DIR/2OE), enabling simultaneous or staggered A↔B data transfer. Its CMOS design features TTL-voltage-compatible inputs and balanced push-pull outputs with 3-state capability.
It uses distributed VCC/GND pins (10 total) to suppress switching noise, supports up-translation from 3.3 V to 5 V logic domains, and incorporates slow-edge-rate outputs to minimize ringing on lightly loaded buses - critical for motor drive interface and telecom backplane integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across industrial-grade 5 V rails with ±10% tolerance. |
| Propagation Delay | 8.5 ns max (tPLH/tPHL, CL = 15 pF) - enables reliable timing in 100+ MHz bus systems with margin. |
| Output Drive | ±8 mA (IOH/IOL) - sufficient for driving multiple CMOS loads without external buffers in mid-density interfaces. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - guarantees interoperability with legacy TTL and 3.3 V LVTTL logic sources. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive modules and industrial motor drives. |
| ESD Rating | HBM: 1500 V - meets IEC 61000-4-2 Level 2 for robust handling in manufacturing environments. |
| Power Dissipation Cap | Cpd = 17 pF - enables low dynamic power consumption (<1 mW at 1 MHz, no load). |
Pinout & Package
SN74AHCT16245DLR uses SSOP-48 (DL) package, 15.80 mm × 7.50 mm body, 0.635 mm pitch, with gull-wing leads and exposed thermal pad not present. Pin 1 located at top-left corner (Q1 quadrant), marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Active-HIGH selects A→B data flow; LOW selects B→A - enables synchronous bidirectional bus arbitration. |
| 1OE, 2OE | Output enable input | Active-LOW disables both A and B ports of respective octet into high-impedance state - isolates buses during reset or standby. |
| 1A1–1A8, 2A1–2A8 | Data port A (octet 1 & 2) | Input/output terminals for first and second 8-bit bus segment - flow-through layout minimizes trace crossovers. |
| 1B1–1B8, 2B1–2B8 | Data port B (octet 1 & 2) | Input/output terminals for mirrored bus segment - symmetric pin assignment simplifies differential routing. |
| VCC (pins 7,18,31,42) | Power supply | Four distributed VCC pins reduce IR drop and high-frequency impedance - critical for noise-sensitive telecom interfaces. |
| GND (pins 4,10,15,21,28,34,39,45) | Ground reference | Eight GND pins provide low-inductance return paths and improve PSRR - essential for clean signal integrity in mixed-signal systems. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts 3.3 V logic levels while powered from 5 V - eliminates level-shifter ICs in mixed-voltage backplanes. |
| Flow-through architecture | Input and output pins aligned on opposite sides - enables straight PCB traces, reducing stub length and EMI radiation. |
| Distributed power/ground | 4×VCC + 8×GND pins - lowers simultaneous switching noise (SSN) by >6 dB versus single-supply alternatives. |
| Slow-edge-rate outputs | Controlled slew rate limits dV/dt - suppresses overshoot/undershoot on 50 Ω transmission lines in motor drive gate drivers. |
| Latch-up immunity | >250 mA per JESD17 - prevents destructive latch-up during hot-plug or transient overvoltage events in field-replaceable modules. |
Applications
| Industrial PLC Backplane | Telecom Line Card Interface |
|---|---|
|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-octet transceiver managing isolated A/B bus segments with independent direction and enable control per channel. Use Value: Flow-through pinout reduces layer count and via count in 4-layer backplane designs, lowering manufacturing cost and improving signal integrity. |
Use Scenario: Interfacing FPGA-based packet processors with legacy TDM bus peripherals in optical line cards. IC Role / Device Role / Timing Role: Voltage-level translator and bus isolator enabling 3.3 V FPGA core to drive 5 V TDM PHYs with precise timing alignment. Use Value: 8.5 ns max propagation delay and 1 ns skew guarantee deterministic setup/hold margins for 25 MHz TDM clocks. |
| Motor Drive Control Board | Medical Imaging Data Link |
|
Use Scenario: Isolating microcontroller GPIOs from high-noise gate driver circuits in servo amplifier modules. IC Role / Device Role / Timing Role: 3-state buffer providing controlled enable/disable sequencing to prevent bus contention during power-up/reset. Use Value: Slow-edge outputs suppress EMI emissions below CISPR 22 Class B limits, eliminating need for ferrite beads on data lines. |
Use Scenario: Transmitting real-time sensor data from analog front-end ASICs to image processing DSPs in portable ultrasound units. IC Role / Device Role / Timing Role: Low-power bidirectional transceiver supporting burst-mode transfers with sub-10 ns timing resolution. Use Value: 17 pF power dissipation capacitance enables <0.5 mW active power at 10 MHz - extends battery life in handheld diagnostic devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADLR | Lower VCC range (1.65–3.6 V), 3.3 V only; 5.5 ns faster tPD but lower drive (±24 mA vs ±8 mA) | Not suitable for 5 V systems; requires level shifting when interfacing with 5 V peripherals | Select when full 3.3 V system integration is required and 5 V compatibility is unnecessary |
| 74ALVC16245PW,118 | NXP variant; identical pinout and function but different thermal metrics (RθJA = 65°C/W vs 61°C/W for DL) | Same industrial temperature range; slightly higher junction-to-ambient resistance affects derating above 85°C | Valid alternative for space-constrained SSOP layouts where TI stock lead times exceed 12 weeks |
Compared with SN74AHCT16245DLR, SN74LVC16245ADLR sacrifices 5 V compatibility for speed and lower voltage operation, while 74ALVC16245PW,118 offers identical functionality with minor thermal trade-offs - making SN74AHCT16245DLR optimal for mixed-voltage industrial backplanes requiring guaranteed 5 V interoperability.
Availability
SN74AHCT16245DLR is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line card interfaces, motor drive control boards, medical imaging data links, and embedded instrumentation requiring stable component supply across extended temperature ranges.
Supply support for SN74AHCT16245DLR 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 solutions, with over 50 years of innovation in industrial and automotive electronics.
The SN74AHCT16245DLR belongs to TI's Widebus™ family of high-speed logic devices, engineered specifically for noise-resilient, multi-voltage bus interfacing in harsh industrial and telecom infrastructure environments.
FAQ
What is the maximum operating temperature for SN74AHCT16245DLR?
The SN74AHCT16245DLR is rated for continuous operation from –40°C to +125°C ambient temperature, validated per JEDEC JESD22-A108 and supported by thermal metrics including RθJA = 61.0°C/W in SSOP-48 package. This rating applies across all recommended operating conditions and is documented in Section 7.3 of the official datasheet.
Does SN74AHCT16245DLR support 3.3 V logic inputs while powered at 5 V?
Yes, SN74AHCT16245DLR supports TTL-compatible inputs with VIH = 2 V and VIL = 0.8 V, allowing direct connection to 3.3 V logic sources while operating at VCC = 4.5–5.5 V. This enables seamless 3.3 V-to-5 V up-translation without external level shifters, as confirmed in Section 9.3 and Table 7.3 of the datasheet.
How many independent transceiver channels does SN74AHCT16245DLR provide?
SN74AHCT16245DLR provides two independent 8-bit transceiver channels (octets), each with dedicated direction (1DIR/2DIR) and output-enable (1OE/2OE) controls. This allows simultaneous or asynchronous bidirectional communication between two 8-bit bus segments, as detailed in the functional block diagram (Figure 4) and function table (Table 1).
What is the purpose of the multiple VCC and GND pins on SN74AHCT16245DLR?
SN74AHCT16245DLR features four VCC and eight GND pins to minimize simultaneous switching noise and reduce power distribution impedance. This distributed power architecture improves PSRR and signal integrity in high-speed bus applications, as explicitly stated in the "Features" section and verified in thermal and noise characterization data (Sections 7.4 and 7.7).
Can SN74AHCT16245DLR be used in hot-swap applications?
SN74AHCT16245DLR supports controlled hot-swap operation when OE is held HIGH (disabled) during insertion, preventing bus contention. Its overvoltage-tolerant inputs (up to 5.5 V) and latch-up immunity (>250 mA per JESD17) further enhance robustness - however, external current-limiting and sequencing circuitry is still recommended per TI Application Report SCBA004.
SN74AHCT16245DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74AHCT16245DLR FAQ
1.How can I place an order for SN74AHCT16245DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT16245DLR 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 SN74AHCT16245DLR reliable?
The price and inventory of SN74AHCT16245DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16245DLR is usually 5 days.
3.What payment methods are accepted for SN74AHCT16245DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT16245DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT16245DLR?
SN74AHCT16245DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT16245DLR 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 SN74AHCT16245DLR?
For technical support, including SN74AHCT16245DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16245DLR requirements.
6.How does Aetrix verify that SN74AHCT16245DLR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT16245DLR 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 SN74AHCT16245DLR meets industry standards.
7.What is the process for return or replacement of SN74AHCT16245DLR?
All SN74AHCT16245DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16245DLR, 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 SN74AHCT16245DLR part is unused and in its original packaging.
Return procedure for SN74AHCT16245DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHCT16245DLR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
