My Inquiry
My Account
Texas Instruments SN74ABT16657DGGR
- Part No.:
- SN74ABT16657DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ABT16657DGGR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,451
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT16657 from Texas Instruments is a 16-bit noninverting transceiver IC with dual parity generator/checker circuits, 3-state outputs, and high-drive capability (–32 mA IOH / 64 mA IOL) for bidirectional data bus interfacing in industrial control backplanes and memory expansion systems.
For engineers reviewing the SN74ABT16657 datasheet, SN74ABT16657 pinout, SN74ABT16657 application, or SN74ABT16657 equivalent, key selection criteria include its 56-pin TSSOP (DGG) package, ±100 µA input leakage at 5.5 V, 1.5–4.3 ns propagation delay (A→B), and support for odd/even parity validation in real-time data integrity monitoring.
Technical Context
The SN74ABT16657 integrates two independent octal transceiver sections-each with dedicated transmit/receive direction control (1T/R, 2T/R), output-enable (1OE, 2OE), and parity configuration (1ODD/EVEN, 2ODD/EVEN). Data flow direction is determined per section by the T/R input level, while OE forces both A and B ports into high-impedance state when high.
Each section implements hardware parity generation during transmit mode (setting 1PARITY/2PARITY to maintain selected odd/even sense across eight data bits plus parity) and parity checking during receive mode (asserting 1ERR/2ERR low on mismatch). The device uses EPIC-IIB BiCMOS process for reduced power dissipation and distributed VCC/GND pins to suppress high-speed switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL logic rails and tolerant of typical board-level supply ripple. |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments without derating. |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads and supports stubbed bus topologies without signal degradation. |
| Propagation Delay | 1.5 ns (min) to 4.3 ns (max) A→B - enables reliable timing closure in 100-MHz-class synchronous bus designs. |
| Input Leakage | ±100 µA at VCC = 5.5 V - ensures stable logic levels with minimal current draw on control inputs during static operation. |
| Parity Function | Configurable odd/even per section via ODD/EVEN pin - provides hardware-accelerated error detection without CPU overhead in safety-critical data paths. |
| ESD Rating | Exceeds 500 mA latch-up immunity per JESD-17 - withstands transient currents induced by board handling or system-level ESD events. |
Pinout & Package
SN74ABT16657 is housed in a 56-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 300-mil body width, 0.5-mm lead pitch, RoHS-compliant with CU NIPDAU finish and Moisture Sensitivity Level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output Enable (active-low) | Controls high-impedance state for corresponding A/B port pairs; tied to VCC via pullup for safe power-up behavior. |
| 1T/R, 2T/R | Transmit/Receive Direction | High = A→B data flow; Low = B→A data flow - enables bidirectional bus arbitration without external logic. |
| 1ODD/EVEN, 2ODD/EVEN | Parity Mode Select | Low = even parity; High = odd parity - configures parity generator/checker per section independently. |
| 1PARITY, 2PARITY | Parity Bit I/O | Output in transmit mode; input in receive mode - carries ninth bit for parity validation across eight data lines. |
| 1ERR, 2ERR | Parity Error Flag | Active-low open-drain output - asserts when received data violates configured parity sense, usable as interrupt source. |
| 1A1–1A8, 2A1–2A8 | Port A Data I/O | Octal data interface for first/second transceiver section - connects to local controller or processor data bus. |
| 1B1–1B8, 2B1–2B8 | Port B Data I/O | Octal data interface for first/second transceiver section - connects to remote peripheral or memory subsystem. |
| VCC, GND | Power Distribution | Distributed across 10 pins (5 VCC, 5 GND) - minimizes simultaneous switching noise and improves signal integrity on high-speed buses. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent transceiver sections | Enables concurrent bidirectional communication on two separate 8-bit buses - reduces component count versus discrete octal solutions. |
| Hardware parity generation/checking | Offloads parity computation from host MCU - eliminates software latency and guarantees deterministic error detection timing. |
| Flow-through pin architecture | Minimizes PCB trace length and layer transitions - simplifies layout for high-density backplane interfaces and reduces crosstalk risk. |
| High-drive 3-state outputs | Supports fan-out to ≥10 LSTTL loads - maintains signal integrity across long traces or multi-drop bus configurations. |
| EPIC-IIB BiCMOS process | Reduces dynamic power vs. standard bipolar TTL - lowers thermal load in densely packed industrial modules. |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
Use Scenario: Bidirectional data transfer between CPU module and I/O expansion cards in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Transceiver bridges 16-bit data bus between isolated zones; parity logic validates frame integrity across noisy industrial environments. Use Value: Hardware parity detection catches transmission errors before firmware processing - prevents spurious I/O faults and improves system MTBF. | Use Scenario: Extending address/data bus from main controller to SRAM or Flash memory banks in embedded instrumentation. IC Role / Device Role / Timing Role: Buffers and isolates memory bus signals; configurable parity supports ECC-capable memory controllers requiring error-checked writes. Use Value: High-drive outputs drive >15 pF load per line - sustains signal edge rates required for 25-MHz asynchronous memory access. |
| Telecom Line Card Interconnect | Test Equipment Data Acquisition |
Use Scenario: Interfacing DSP-based processing modules with front-end analog interface cards in base station equipment. IC Role / Device Role / Timing Role: Provides direction-controlled data path between digital signal processors and ADC/DAC interfaces; parity flags detect corruption during high-noise RF exposure. Use Value: Distributed VCC/GND pins reduce ground bounce below 1 V - preserves analog measurement accuracy in mixed-signal systems. | Use Scenario: Synchronizing high-speed digitizer modules with central acquisition controller in automated test systems. IC Role / Device Role / Timing Role: Transceives trigger and status signals between modules; parity validation ensures command integrity across modular chassis backplanes. Use Value: 1.5 ns min tPLH enables sub-5 ns timing resolution - meets tight setup/hold windows for 200-MSPS sampling control. |
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 |
|---|---|---|---|
| SN74ABT162245DGGR | No parity generation/checking; 16-bit noninverting transceiver only; identical 56-pin TSSOP package and drive strength. | Suitable where data integrity is handled at protocol layer (e.g., CRC in firmware); lacks hardware parity flag outputs. | Select when parity is unnecessary and cost reduction is prioritized over error-detection capability. |
| SN74LVC16T245DGGR | 3.3-V only operation; lower drive (–24 mA / 24 mA); no parity logic; supports voltage translation between 1.8/2.5/3.3-V domains. | Used in modern low-voltage systems; requires external parity logic if needed; incompatible with 5-V legacy buses. | Choose for new 3.3-V designs requiring level shifting; not drop-in replaceable for 5-V SN74ABT16657 applications. |
Compared with SN74ABT16657, SN74ABT162245DGGR removes parity functionality but retains identical pinout and drive - ideal for cost-sensitive 5-V systems without hardware error checking. SN74LVC16T245DGGR shifts to 3.3-V operation and adds voltage translation, sacrificing parity and 5-V compatibility for lower power and mixed-voltage interoperability.
Availability
SN74ABT16657 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and telecom line card interconnects requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT16657 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, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT16657 belongs to TI's Widebus™ family of high-speed bus interface devices, designed specifically for robust, low-noise data transfer in noise-prone industrial and telecom infrastructure applications.
FAQ
What is the maximum operating temperature range for the SN74ABT16657?
The SN74ABT16657 is characterized for operation from –40°C to +85°C. This industrial-grade temperature range ensures reliable performance in demanding environments such as factory automation controllers, outdoor telecom cabinets, and power distribution units where ambient temperatures exceed commercial limits. The SN74ABT16657 does not support extended military-range operation like the SN54ABT16657 variant.
How does the SN74ABT16657 implement parity checking during data reception?
During receive mode (T/R low), the SN74ABT16657 counts high bits on the B-port bus, compares the result against the configured parity sense (odd/even set by ODD/EVEN), and asserts the ERR output low if mismatched. For example, with odd parity selected and three high bits on B1–B8 plus a high PARITY input, ERR remains high; if PARITY is low, ERR goes low indicating error. This hardware validation occurs within 2–7 ns, independent of host processor intervention.
Can the SN74ABT16657 be used in a 3.3-V system?
No, the SN74ABT16657 is specified only for 4.5 V to 5.5 V operation and is not 3.3-V compatible. Attempting to operate it at 3.3 V results in undefined logic thresholds, degraded noise margins, and potential failure to meet timing specifications. For 3.3-V applications requiring similar functionality, consider the SN74LVC16T245DGGR - though it lacks parity logic and requires redesign for voltage domain compatibility.
What is the purpose of the NC pins on the SN74ABT16657 DGG package?
The SN74ABT16657 DGG package includes two NC (No internal connection) pins - pin 2 and pin 55 - which are physically present but unconnected to any internal circuitry. These pins serve mechanical stabilization and package symmetry purposes during PCB assembly and reflow. They must remain unconnected in the schematic and layout; routing traces or applying voltage to NC pins may cause unintended coupling or violate JEDEC packaging standards.
Does the SN74ABT16657 support hot insertion or live bus swapping?
The SN74ABT16657 does not include explicit hot-swap protection features such as slew-rate control or backdrive tolerance. However, its high latch-up immunity (>500 mA per JESD-17) and robust 3-state output structure allow controlled live insertion when OE is held high (disabling outputs) prior to connection and sequenced power-up is enforced. TI recommends using series resistors and RC filters on control lines for full hot-swap compliance - the SN74ABT16657 itself provides foundational resilience but requires system-level design for guaranteed safe hot insertion.
SN74ABT16657DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
SN74ABT16657DGGR FAQ
1.How can I place an order for SN74ABT16657DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16657DGGR 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 SN74ABT16657DGGR reliable?
The price and inventory of SN74ABT16657DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16657DGGR is usually 5 days.
3.What payment methods are accepted for SN74ABT16657DGGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16657DGGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT16657DGGR?
SN74ABT16657DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16657DGGR 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 SN74ABT16657DGGR?
For technical support, including SN74ABT16657DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16657DGGR requirements.
6.How does Aetrix verify that SN74ABT16657DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16657DGGR 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 SN74ABT16657DGGR meets industry standards.
7.What is the process for return or replacement of SN74ABT16657DGGR?
All SN74ABT16657DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16657DGGR, 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 SN74ABT16657DGGR part is unused and in its original packaging.
Return procedure for SN74ABT16657DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT16657DGGR 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…
