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Texas Instruments SN74ABT16823DLG4
- Part No.:
- SN74ABT16823DLG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16823DLG4.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
SN74ABT16823DLG4 from Texas Instruments is an 18-bit bus-interface D-type flip-flop with 3-state outputs, designed for high-speed bidirectional bus buffering in industrial and computing systems. It features dual 9-bit sections (1CLK/1D–1Q and 2CLK/2D–2Q), ±32-mA high-drive outputs, 150-MHz maximum clock frequency, and operates from 4.5 V to 5.5 V over –40°C to 85°C. It is used in I/O port expansion and parity-enabled bus drivers.
For engineers reviewing the SN74ABT16823DLG4 datasheet, SN74ABT16823DLG4 pinout, SN74ABT16823DLG4 application, or SN74ABT16823DLG4 equivalent, key selection criteria include 3-state output timing (tPZH = 1 ns min, tPLZ = 1.6 ns min), high-impedance behavior during power-up (VCC < 2.1 V), distributed VCC/GND pinning for noise reduction, and compatibility with 5-V TTL logic levels.
Technical Context
This device implements two independent 9-bit edge-triggered D-type flip-flop banks, each with dedicated clock (CLK), clock-enable (CLKEN), clear (CLR), and output-enable (OE) controls. The flow-through pin architecture minimizes trace routing complexity on PCBs, while EPIC-IIB BiCMOS design enables low power dissipation without sacrificing speed.
Each section supports asynchronous active-low CLR and synchronous CLKEN gating; OE controls output state independently of internal latching. Outputs enter high-impedance when OE is high or VCC is below 2.1 V-ensuring bus isolation during power sequencing. VOLP (ground bounce) remains under 1 V at 5 V/25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 18-bit dual 9-bit D-type flip-flop with 3-state outputs |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL systems |
| Max Clock Frequency | 150 MHz - supports high-speed data latching in backplane and memory interface applications |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavy capacitive loads without external buffers |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Propagation Delay | tPLH/tPHL ≤ 5.5 ns (CLK to Q) - ensures tight timing margins in synchronous bus designs |
| Enable/Disable Time | tPZH ≤ 4.2 ns, tPLZ ≤ 6.4 ns (OE to Q) - enables fast bus turnaround in multiplexed data paths |
Pinout & Package
SN74ABT16823DLG4 uses a 56-pin SSOP (Shrink Small-Outline Package), DL variant, with 300-mil body width and 0.65-mm lead pitch. Pin 1 is located at top-left corner with index marking; package conforms to JEDEC MO-194 and features distributed VCC/GND pins to suppress switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous clear input (active low) | Forces Q outputs low regardless of clock state - enables system reset without clock dependency |
| 1OE, 2OE | Output-enable input (active low) | Controls 9-bit output group into high-Z or driven state - allows independent bus arbitration per section |
| 1CLKEN, 2CLKEN | Clock enable input (active low) | Gates clock buffer - holds Q outputs steady while preserving internal D-input sampling capability |
| 1CLK, 2CLK | Clock input (positive-edge triggered) | Triggers data capture from D inputs to Q outputs - synchronized latching across all 9 bits per bank |
| 1D1–1D9, 2D1–2D9 | Data inputs | Parallel 18-bit input path - accepts standard TTL-level signals for register loading |
| 1Q1–1Q9, 2Q1–2Q9 | 3-state outputs | High-drive, bus-compatible outputs - support hot-swap and shared-bus contention-free operation |
| VCC, GND | Power supply terminals | Distributed across package (12 total VCC/GND pins) - reduces simultaneous switching noise and improves signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input-to-output signal path runs left-to-right across package - simplifies layer routing and minimizes trace crossovers |
| Power-up high-impedance | Outputs remain in high-Z when VCC is between 0 and 2.1 V - prevents bus contention during power sequencing |
| EPIC-IIB BiCMOS process | Combines bipolar speed with CMOS low static power - achieves 150-MHz operation with ICC < 80 mA |
| High-impedance state retention | OE does not affect internal flip-flop operation - new D-data can be loaded while outputs are disabled |
| TTL-compatible I/O | VIH = 2 V min, VIL = 0.8 V max - interoperable with legacy 5-V logic families without level shifting |
Applications
| Industrial Backplane Interface | Memory-Mapped I/O Expansion |
|---|---|
|
Use Scenario: Isolating CPU address/data buses from peripheral modules in modular PLC chassis. IC Role / Device Role / Timing Role: 18-bit bidirectional bus transceiver with independent OE control per 9-bit segment. Use Value: Enables hot-plug module detection via OE-gated bus access and eliminates need for external pull-ups or bus terminators. |
Use Scenario: Expanding GPIO count on microcontroller-based HMI panels with parallel LCD and keypad interfaces. IC Role / Device Role / Timing Role: Synchronized latch for 18-bit parallel I/O port with programmable clock-enable gating. Use Value: Supports simultaneous read/write of status registers and control words using single-cycle clocking and glitch-free OE transitions. |
| Parity-Enabled Data Bus | Legacy System Bus Bridge |
|
Use Scenario: Adding even-parity generation and checking to a 16-bit ISA-style data bus in retro-computing hardware. IC Role / Device Role / Timing Role: Dual 9-bit register with shared clock and separate OE/CLR - accommodates 16 data + 2 parity bits. Use Value: Provides deterministic setup/hold timing (tsu = 1.7 ns, th = 1.2 ns) for reliable parity validation at full bus speed. |
Use Scenario: Interfacing modern FPGA-based controllers to legacy 8086/80286-based subsystems requiring 5-V tolerant, high-drive bus latching. IC Role / Device Role / Timing Role: Level-shifting, noise-immune bus interface with 64-mA sink capability and ground-bounce suppression. Use Value: Eliminates external bus buffers and reduces EMI through distributed power pins and sub-1-V VOLP performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus-interface flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16223DLR | 16-bit (two 8-bit) configuration; identical 56-pin SSOP package and 150-MHz rating | Lacks two data/output bits - suitable only where 16-bit width suffices and pin compatibility is required | Select when board layout rework is unacceptable and 16-bit bus width meets functional requirements |
| SN74LVC16373ADLR | 3.3-V only (1.65–3.6 V); lower drive (–24/+24 mA); different pinout (no CLKEN) | Requires level translation for 5-V systems; lacks clock-enable function - limits use in gated-clock architectures | Choose only for new 3.3-V designs prioritizing ultra-low power over legacy voltage compatibility |
Compared with SN74ABT16223DLR and SN74LVC16373ADLR, SN74ABT16823DLG4 uniquely delivers 18-bit width, 5-V tolerance, CLKEN functionality, and 64-mA drive in a single SSOP package - making it irreplaceable in industrial backplane and parity-critical bus applications.
Availability
SN74ABT16823DLG4 is available at Aetrix Electronics and suitable for industrial automation, legacy system upgrades, and high-reliability computing applications requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT16823DLG4 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-speed interface ICs and industrial-grade reliability.
SN74ABT16823DLG4 belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for noise-resilient, high-drive 5-V TTL bus buffering in demanding industrial and computing environments.
FAQ
What is the operating voltage range for SN74ABT16823DLG4?
The SN74ABT16823DLG4 operates from 4.5 V to 5.5 V DC. This 5-V nominal range ensures compatibility with standard TTL logic families and industrial power rails. Operation outside this range - including during power-up - triggers automatic high-impedance output behavior below 2.1 V, preventing bus conflicts. Absolute maximum VCC is 7 V, but sustained operation above 5.5 V is not recommended.
Does SN74ABT16823DLG4 support independent control of its two 9-bit sections?
Yes, SN74ABT16823DLG4 provides fully independent control per 9-bit section: each has dedicated CLK, CLKEN, CLR, and OE inputs. This allows one section to latch data while the other holds output state, or to gate clocks separately for staggered timing. Pin mapping confirms physical separation - e.g., 1CLK (pin 56) and 2CLK (pin 29) are non-overlapping, enabling true dual-channel operation.
What is the significance of the "G4" suffix in SN74ABT16823DLG4?
The "G4" suffix in SN74ABT16823DLG4 denotes TI's green packaging standard: lead-free (Pb-free), RoHS-compliant construction with NiPdAu (NIPDAU) lead finish and moisture sensitivity level (MSL) 1 rating (260°C peak reflow). It matches the DL package variant (56-pin SSOP) and shares identical electrical specs and timing with non-G4 versions - differing only in environmental compliance and finish.
How does SN74ABT16823DLG4 handle power sequencing in multi-rail systems?
SN74ABT16823DLG4 enters a guaranteed high-impedance state when VCC is between 0 and 2.1 V, eliminating bus contention during power-up/down. For robustness above 2.1 V, OE should be tied to VCC via a pullup resistor (value determined by driver strength). This behavior - verified in the datasheet's power-up sequence section - ensures safe integration into systems with asymmetric rail ramp rates.
Can SN74ABT16823DLG4 be used in place of SN74ABT16823DL?
Yes, SN74ABT16823DLG4 is a direct replacement for SN74ABT16823DL in terms of pinout, functionality, timing, and DC specifications. The only differences are RoHS compliance (G4 = green, Pb-free) and packaging format (G4 shipped in tape-and-reel; DL typically in tube). Both share identical DL package dimensions, thermal characteristics (θJA = 74°C/W), and operating temperature range (–40°C to 85°C).
SN74ABT16823DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 9
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 5.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 500 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ABT16823DLG4 FAQ
1.How can I place an order for SN74ABT16823DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16823DLG4 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 SN74ABT16823DLG4 reliable?
The price and inventory of SN74ABT16823DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16823DLG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT16823DLG4?
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4.How is shipping managed for SN74ABT16823DLG4?
SN74ABT16823DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16823DLG4 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 SN74ABT16823DLG4?
For technical support, including SN74ABT16823DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16823DLG4 requirements.
6.How does Aetrix verify that SN74ABT16823DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT16823DLG4 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 SN74ABT16823DLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT16823DLG4?
All SN74ABT16823DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16823DLG4, 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 SN74ABT16823DLG4 part is unused and in its original packaging.
Return procedure for SN74ABT16823DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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