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Texas Instruments SN74ABT16640DGGR
- Part No.:
- SN74ABT16640DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ABT16640DGGR.pdf
- Description:
- IC TXRX INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,318
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Product details
Overview
SN74ABT16640DGGR from Texas Instruments is a 16-bit inverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between parallel buses. It operates at 4.5 V to 5.5 V, delivers ±32-mA high-drive outputs, and supports –40°C to 85°C industrial temperature range in a 48-pin TSSOP (DGG) package. Used in backplane and board-level interconnects requiring level-shifted isolation.
For engineers reviewing the SN74ABT16640DGGR datasheet, SN74ABT16640DGGR pinout, SN74ABT16640DGGR application, or SN74ABT16640DGGR equivalent, key selection criteria include its dual 8-bit directional control (1DIR/2DIR), independent output-enable (1OE/2OE), flow-through pinout for PCB layout optimization, and latch-up immunity exceeding 500 mA per JESD-17.
Technical Context
This device implements two independent 8-bit inverting transceiver sections, each with separate direction (DIR) and output-enable (OE) controls. Its EPIC-IIB BiCMOS architecture enables low power dissipation while sustaining high-speed switching - typical propagation delays are 1.0–3.4 ns (tPLH/tPHL) at 5 V with 50-pF load.
The distributed VCC/GND pin configuration minimizes simultaneous switching noise, and the flow-through architecture aligns A- and B-side I/O pins across opposite edges of the package. Output ground bounce (VOLP) remains below 1 V at VCC = 5 V and TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS logic domains without level-shifting circuitry. |
| Output Drive | –32 mA IOH, +64 mA IOL - drives heavy capacitive loads and long traces without external buffers. |
| Propagation Delay | 1.0–3.4 ns (tPLH/tPHL) - supports >200-MHz bus toggle rates under typical conditions. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and communications equipment. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - ensures robust noise margin against TTL-compatible inputs. |
| Latch-Up Immunity | >500 mA per JESD-17 - prevents destructive latch-up during transient overvoltage or hot-insertion events. |
| Package | TSSOP-48 (DGG), 12.6 mm × 6.2 mm × 1.2 mm - surface-mount footprint optimized for high-density PCBs with thermal θJA = 89°C/W. |
Pinout & Package
SN74ABT16640DGGR uses a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG) with gull-wing leads, 0.5-mm pitch, and flow-through pin arrangement that separates A- and B-bus signals on opposing sides to simplify routing and reduce crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Selects data flow direction per 8-bit section: DIR = L → B-to-A; DIR = H → A-to-B. |
| 1OE, 2OE | Output-enable input (active-low) | Drives outputs to high-impedance state when high; ties to VCC via pullup for power-up safety. |
| 1A1–1A8, 2A1–2A8 | Section 1 & 2 A-side data I/O | Inverting inputs/outputs connected to local bus; driven by or drive A-bus signals. |
| 1B1–1B8, 2B1–2B8 | Section 1 & 2 B-side data I/O | Inverting inputs/outputs connected to remote bus; driven by or drive B-bus signals. |
| VCC (pins 7, 18, 28, 39) | Power supply | Distributed VCC pins minimize IR drop and switching noise across high-speed operation. |
| GND (pins 4, 10, 15, 21, 27, 32, 38, 45) | Ground reference | Eight GND pins provide low-inductance return paths and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting transceiver logic | Ensures signal polarity consistency across bus segments without external inversion logic. |
| Flow-through pinout architecture | Enables straight-layer PCB routing with minimal layer transitions and reduced trace length asymmetry. |
| Dual independent 8-bit sections | Allows flexible partitioning: one section for address/data separation, another for control/status lines. |
| High-drive 3-state outputs | –32 mA / +64 mA drive strength sustains signal integrity across 15-cm FR-4 traces with 10-pF load per node. |
| Distributed power/ground network | Four VCC and eight GND pins suppress simultaneous switching output (SSO) noise in multi-bit applications. |
Applications
| Backplane Interconnect | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Bidirectional data exchange between CPU module and peripheral expansion slots in modular automation chassis. IC Role / Device Role / Timing Role: Level-translating, direction-controlled bus isolator enabling synchronous read/write cycles across slot connectors. Use Value: Flow-through pinout reduces stub length and impedance discontinuities, maintaining signal integrity up to 100 MHz on 16-bit parallel backplanes. |
Use Scenario: Isolating field I/O bus from controller bus in programmable logic controller rack systems. IC Role / Device Role / Timing Role: Direction-gated transceiver managing real-time sensor data upload and actuator command download. Use Value: Independent OE/DIR per 8-bit section allows selective activation of analog input vs. digital output banks without software overhead. |
| Test Equipment Bus Interface | Legacy System Upgrade Bridge |
|
Use Scenario: Connecting FPGA-based pattern generator to DUT's parallel test interface with precise timing control. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer ensuring setup/hold compliance for 5-V TTL test vectors. Use Value: Sub-4 ns propagation delay and <1 V ground bounce guarantee deterministic timing margins under full-load toggling. |
Use Scenario: Integrating modern microcontroller subsystems into legacy 5-V ISA or VMEbus architectures. IC Role / Device Role / Timing Role: Asynchronous bus translator preserving original timing budgets while adding drive capability. Use Value: Latch-up immunity >500 mA protects against voltage transients during hot-swap insertion in field-replaceable modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16646DGGR | 3.3-V only (1.65–3.6 V), lower drive (±24 mA), non-inverting logic | Suitable for mixed-voltage 3.3-V systems; requires external inverters if polarity matching needed | Choose for lower power and newer 3.3-V designs where polarity inversion is handled elsewhere. |
| SN74ABT16245DGGR | Non-inverting 16-bit transceiver, identical voltage range, drive, and package | Used where signal polarity must be preserved end-to-end without additional logic | Direct functional substitute when inverting behavior is not required; same pinout but different logic function. |
Compared with SN74ABT16640DGGR, SN74LVC16646DGGR offers lower voltage operation and reduced static power but lacks 5-V tolerance and inverting functionality; SN74ABT16245DGGR matches all electrical specs and packaging but provides non-inverting data path - critical for systems requiring transparent signal polarity.
Availability
SN74ABT16640DGGR is available at Aetrix Electronics and suitable for industrial PLCs, automated test equipment, backplane interconnects, and legacy system upgrades requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT16640DGGR 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 heritage in high-reliability interface ICs.
SN74ABT16640DGGR belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for robust, noise-immune parallel data transfer in industrial and communications infrastructure.
FAQ
What is the maximum operating frequency supported by SN74ABT16640DGGR?
SN74ABT16640DGGR does not specify a maximum clock frequency, but its typical propagation delay of 1.0–3.4 ns (tPLH/tPHL) at 5 V and 50-pF load supports reliable operation up to approximately 200 MHz for toggling bus signals. Actual usable frequency depends on trace length, loading, and system timing margins - verified in application circuits with CL ≤ 50 pF.
Does SN74ABT16640DGGR require external pull-up resistors on OE pins?
Yes - to ensure high-impedance outputs during power-up or power-down, OE pins (1OE and 2OE) must be tied to VCC through external pull-up resistors. The minimum resistor value depends on the current-sinking capability of the driving source; TI recommends evaluating based on system reset timing and driver strength, typically 4.7 kΩ to 10 kΩ for standard logic drivers.
Can SN74ABT16640DGGR operate at 3.3 V?
No - SN74ABT16640DGGR is specified only for 4.5 V to 5.5 V operation. Applying 3.3 V violates recommended operating conditions and results in undefined logic thresholds, degraded noise margin, and unreliable 3-state control. For 3.3-V systems, consider SN74LVC16646DGGR or similar LVC-family transceivers.
How many ground pins does SN74ABT16640DGGR have, and why are they distributed?
SN74ABT16640DGGR has eight dedicated GND pins (pins 4, 10, 15, 21, 27, 32, 38, 45) distributed across the package. This layout minimizes ground loop inductance and reduces simultaneous switching output (SSO) noise - a key design feature of TI's EPIC-IIB BiCMOS process that maintains signal integrity during high-speed 16-bit bus toggling.
Is SN74ABT16640DGGR pin-compatible with SN74ABT16245DGGR?
No - although both are 48-pin TSSOP bus transceivers with identical supply and drive specifications, SN74ABT16640DGGR is inverting while SN74ABT16245DGGR is non-inverting, and their pin mappings differ: DIR/OE functions and A/B I/O assignments are not interchangeable. PCB redesign is required for substitution.
SN74ABT16640DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, 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:
- 48-TSSOP
SN74ABT16640DGGR FAQ
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6.How does Aetrix verify that SN74ABT16640DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16640DGGR 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 SN74ABT16640DGGR meets industry standards.
7.What is the process for return or replacement of SN74ABT16640DGGR?
All SN74ABT16640DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16640DGGR, 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 SN74ABT16640DGGR part is unused and in its original packaging.
Return procedure for SN74ABT16640DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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