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Texas Instruments SN74ABT16657DL
- Part No.:
- SN74ABT16657DL
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16657DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,627
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Product details
Overview
SN74ABT16657DL from Texas Instruments is a 16-bit noninverting transceiver IC with dual 8-bit sections, integrated parity generators/checkers, and 3-state outputs. It operates at 4.5–5.5 V, supports bidirectional data flow per section (via T/R control), and delivers ±32-mA/±64-mA drive strength. Used in high-speed backplane and bus interface applications requiring error-detecting parity.
For engineers reviewing the SN74ABT16657DL datasheet, SN74ABT16657DL pinout, SN74ABT16657DL application, or SN74ABT16657DL equivalent, key selection criteria include its DL-package 56-pin SSOP footprint, –40°C to 85°C industrial temperature range, dual-parity-check capability, and flow-through pin architecture for optimized PCB layout.
Technical Context
The SN74ABT16657DL implements two independent octal transceiver sections, each with dedicated transmit/receive (T/R) direction control, output-enable (OE), odd/even parity select (ODD/EVEN), and parity/error signaling (PARITY, ERR). Each section processes eight data bits plus one parity bit, enabling real-time parity generation during transmit and parity validation with error flag assertion during receive.
Its EPIC-IIB BiCMOS process enables low ground bounce (<1 V VOLP), distributed VCC/GND pins to suppress switching noise, and high-drive outputs (–32 mA IOH, 64 mA IOL). The flow-through pinout separates A- and B-side signals across opposite package edges to minimize trace crossovers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic systems. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| Output Drive | –32 mA IOH, 64 mA IOL - Supports heavy capacitive loads and long trace routing without signal degradation. |
| Propagation Delay | 1.5 ns to 4.5 ns (A↔B) - Enables reliable operation in high-speed synchronous bus environments up to ~200 MHz. |
| Parity Function | Dual independent parity generator/checker per 8-bit section - Provides hardware-level data integrity verification on both transmit and receive paths. |
| Package | 56-pin SSOP (DL) - 300-mil body width, 0.65-mm pitch, RoHS-compliant NIPDAU finish, MSL Level-1. |
| Input Leakage | ±1 µA (control), ±100 µA (I/O) - Minimizes static current draw and avoids unintended logic transitions on unterminated lines. |
Pinout & Package
SN74ABT16657DL uses a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil wide, with 0.65-mm lead pitch and exposed thermal pad not present. Pin numbering follows standard JEDEC top-view convention with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output Enable (active-low) | Disables both A and B ports of respective section into high-impedance state; required for bus sharing. |
| 1T/R, 2T/R | Transmit/Receive Direction Control | High = A→B (transmit); Low = B→A (receive); defines real-time data path direction per section. |
| 1ODD/EVEN, 2ODD/EVEN | Parity Mode Select | High = odd parity; Low = even parity - configures parity generator/checker behavior before data transfer. |
| 1PARITY, 2PARITY | Parity Bit I/O | Output during transmit (generated parity); input during receive (expected parity for error checking). |
| 1ERR, 2ERR | Parity Error Flag | Active-low open-drain output asserting mismatch between received data+parity and selected parity sense. |
| 1A1–1A8, 2A1–2A8 | Section A Data I/O | Primary data port for each 8-bit section; connected to local controller or processor bus. |
| 1B1–1B8, 2B1–2B8 | Section B Data I/O | Secondary data port for each 8-bit section; typically connected to shared system bus or backplane. |
| VCC, GND | Power & Ground | Distributed across 8 VCC and 8 GND pins - reduces simultaneous switching noise and improves signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Separates A- and B-side signals on opposite package edges - eliminates layer jumps and minimizes PCB routing congestion. |
| Dual independent parity engines | Each 8-bit section generates or checks parity in hardware - offloads CPU, enables real-time error detection without software overhead. |
| High-noise-immunity BiCMOS design | EPIC-IIB process delivers <1 V output ground bounce at 5 V - maintains signal fidelity in dense, high-speed digital systems. |
| 3-state bus-hold compatible outputs | Outputs enter high-Z when OE is high - allows multiple devices to share a common bus without contention or external bus switches. |
| Distributed power/ground pinning | Eight VCC and eight GND pins interleaved across package - lowers effective power supply impedance and suppresses simultaneous switching noise. |
Applications
| Backplane Data Interface | Industrial Bus Bridge |
|---|---|
|
Use Scenario: Bidirectional communication between CPU module and peripheral expansion slots in modular PLC or test equipment chassis. IC Role / Device Role / Timing Role: Transceiver buffers and level-shifts 16-bit parallel data while validating parity across hot-swappable backplane connectors. Use Value: Prevents undetected data corruption during high-vibration or EMI-prone chassis operation via hardware parity checking on every transaction. |
Use Scenario: Interfacing legacy 8-bit microcontroller subsystems with modern 16-bit fieldbus controllers in factory automation gateways. IC Role / Device Role / Timing Role: Synchronizes asynchronous bus timing, translates voltage levels, and enforces data integrity using per-section parity generation. Use Value: Eliminates need for external parity logic or firmware checksum routines, reducing gateway BOM count and firmware complexity. |
| Memory Expansion Interface | Test Equipment Data Capture |
|
Use Scenario: Extending address/data bus width between SoC and external SRAM or Flash memory banks in embedded instrumentation. IC Role / Device Role / Timing Role: Isolates memory subsystem timing domains while providing parity-checked data forwarding during burst read/write cycles. Use Value: Enables deterministic 16-bit memory access with single-bit error detection-critical for calibration data storage and firmware update reliability. |
Use Scenario: Capturing parallel digital stimulus/response patterns from DUTs in automated test systems with multi-channel digital I/O cards. IC Role / Device Role / Timing Role: Latches and forwards high-speed parallel vectors while flagging parity mismatches indicative of signal integrity failure or DUT fault. Use Value: Provides immediate hardware-level pass/fail indication for each captured word, accelerating test cycle time and root-cause analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver with parity applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DL | No parity generation/checking; only direction-controlled 16-bit transceiving. | Suitable where data integrity is handled at protocol layer (e.g., CRC in firmware), not hardware. | Select when parity is unnecessary and lower gate count or cost is prioritized. |
| SN74LVTH16657DL | Lower voltage (3.3 V), reduced drive (–24 mA/48 mA), higher propagation delay (up to 6.5 ns). | Targets mixed-voltage 3.3-V/5-V systems; not drop-in compatible due to VCC and timing differences. | Choose for 3.3-V domain integration where power efficiency outweighs speed and parity requirements. |
Compared with SN74ABT16657DL, SN74ABT162245DL removes parity logic to reduce area and cost but sacrifices hardware error detection, while SN74LVTH16657DL trades speed and 5-V compatibility for 3.3-V operation and lower static power-neither offers pin-compatible parity functionality.
Availability
SN74ABT16657DL is available at Aetrix Electronics and suitable for industrial bus bridges, backplane interfaces, and memory expansion systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74ABT16657DL 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 logic solutions, with decades of expertise in high-reliability interface ICs.
The SN74ABT16657DL belongs to TI's Widebus™ family of advanced bus-interface devices, engineered for high-speed, noise-resilient data transfer in industrial, computing, and communications infrastructure.
FAQ
What is the operating voltage range for SN74ABT16657DL?
The SN74ABT16657DL operates over a supply voltage range of 4.5 V to 5.5 V. This ensures robust compatibility with standard 5-V TTL logic families and accommodates typical power rail tolerances in industrial systems. Operation outside this range may cause functional failure or permanent damage, as specified in the absolute maximum ratings.
Does SN74ABT16657DL support hot-swap or power sequencing requirements?
Yes - to ensure high-impedance state during power-up/down, the OE inputs of SN74ABT16657DL must be tied to VCC through a pull-up resistor. The minimum resistance value depends on the driver's current-sinking capability, preventing bus contention before system initialization completes.
How does the parity checking function work in SN74ABT16657DL?
In receive mode, SN74ABT16657DL counts high bits on the B-port bus and compares the result against the expected parity (odd or even, set by ODD/EVEN input) and the incoming PARITY bit. If mismatched, the corresponding ERR output asserts low - a hardware-level flag requiring no software polling or computation.
Can SN74ABT16657DL be used in a 3.3-V system?
No - SN74ABT16657DL is designed exclusively for 5-V operation (4.5–5.5 V). Applying 3.3 V violates recommended operating conditions and will result in undefined logic states, excessive propagation delay, or failure to drive outputs correctly. For 3.3-V systems, consider SN74LVTH16657DL instead.
What package type and moisture sensitivity level does SN74ABT16657DL use?
SN74ABT16657DL uses a 56-pin SSOP (Shrink Small-Outline Package) with DL suffix, 300-mil body width, and 0.65-mm lead pitch. It carries an MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH), allowing indefinite storage and standard reflow without baking.
SN74ABT16657DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ABT16657DL FAQ
1.How can I place an order for SN74ABT16657DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16657DL 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 SN74ABT16657DL reliable?
The price and inventory of SN74ABT16657DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16657DL is usually 5 days.
3.What payment methods are accepted for SN74ABT16657DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16657DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT16657DL?
SN74ABT16657DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16657DL 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 SN74ABT16657DL?
For technical support, including SN74ABT16657DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16657DL requirements.
6.How does Aetrix verify that SN74ABT16657DL is sourced from the original manufacturer or authorized distributors?
All SN74ABT16657DL 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 SN74ABT16657DL meets industry standards.
7.What is the process for return or replacement of SN74ABT16657DL?
All SN74ABT16657DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16657DL, 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 SN74ABT16657DL part is unused and in its original packaging.
Return procedure for SN74ABT16657DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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