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Texas Instruments SN74ABT823DBR
- Part No.:
- SN74ABT823DBR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT823DBR.pdf
- Description:
- IC FF D-TYPE SNGL 9BIT 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
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Product details
Overview
SN74ABT823DBR from Texas Instruments is a 9-bit bus-interface D-type flip-flop with 3-state outputs, designed for high-drive bidirectional bus buffering in industrial and embedded systems. It features –32-mA IOH / 64-mA IOL drive strength, 125-MHz maximum clock frequency, and operates over –40°C to 85°C. It is used in I/O port expansion and parity-enabled bus drivers.
For engineers reviewing the SN74ABT823DBR datasheet, SN74ABT823DBR pinout, SN74ABT823DBR application, or SN74ABT823DBR equivalent, key selection criteria include 3-state output timing (tPZH = 1–6 ns), power-up high-impedance behavior below 2.1 V VCC, and compatibility with 5-V TTL-level control signals.
Technical Context
This device implements nine edge-triggered D-type flip-flops with independent clock-enable (CLKEN) and asynchronous clear (CLR) inputs, enabling synchronous data latching and global reset. Its buffered OE input controls all nine outputs simultaneously into high-impedance or active logic states without dc loading effects on control lines.
The SN74ABT823DBR uses EPIC-IIB BiCMOS technology to achieve low ground bounce (<1 V VOLP), latch-up immunity (>500 mA per JESD-17), and ESD protection exceeding 2000 V (MIL-STD-883). It enters high-impedance during power-up/down when VCC is between 0 and 2.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 9-bit D-type flip-flop with 3-state outputs and clock-enable |
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation across standard 5-V TTL rails |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavy capacitive buses without external buffers |
| Max Clock Frequency | 125 MHz - supports high-speed synchronous data transfer in backplane interfaces |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns - enables tight timing margins in fast bus arbitration circuits |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control applications |
| Package | 24-pin SSOP (DB) - surface-mount footprint with 0.65-mm pitch for compact PCB layout |
Pinout & Package
SN74ABT823DBR is housed in a 24-pin Shrink Small-Outline Package (SSOP, DB), measuring 8.2 mm × 5.3 mm with 0.65-mm lead pitch and gull-wing terminations. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and optimized for automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4–11, 15–22 | Data Input (D1–D9) / Output (Q1–Q9) | 9-bit parallel data path; pins 1/2/4–11 = D1–D9; pins 15–22 = Q1–Q9 |
| 13 | Output Enable (OE) | Active-low control: OE = L → outputs enabled; OE = H → high-impedance state |
| 14 | Clear (CLR) | Asynchronous active-low reset forcing all Q outputs low regardless of clock |
| 19 | CLKEN | Active-low clock enable: CLKEN = L → clock active; CLKEN = H → latches outputs |
| 23 | CLK | Positive-edge-triggered master clock input for all nine flip-flops |
| 12, 24 | GND / VCC | Power supply pins - decoupling required within 10 mm of pin 12 (GND) and pin 24 (VCC) |
| 3, 20 | No Connect (NC) | Internally unconnected - must remain floating or grounded per design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA IOH / +64 mA IOL enables direct connection to 50-pF bus loads without pull-ups or interface logic |
| Power-Up/Down High-Z | Automatic high-impedance state when VCC ∈ [0, 2.1 V] prevents bus contention during sequencing |
| Buffered Control Inputs | CLKEN, CLR, and OE inputs use buffered architecture to reduce dc loading and improve noise margin |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V ensures signal integrity on shared ground planes in dense layouts |
| Robust ESD/Latch-up | ESD > 2000 V (HBM); latch-up immunity > 500 mA meets JEDEC JESD-17 for industrial reliability |
Applications
| Industrial PLC I/O Expansion | Backplane Data Buffering |
|---|---|
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using parallel bus architectures. IC Role / Device Role / Timing Role: Acts as a 9-bit synchronized register with 3-state outputs to isolate CPU bus from field-side peripherals. Use Value: Enables hot-swappable module support via OE-controlled bus isolation and eliminates need for discrete bus transceivers. | Use Scenario: Driving long trace lengths and multiple receiver loads on a 5-V backplane in telecom line cards. IC Role / Device Role / Timing Role: Provides edge-aligned data capture and high-current bus driving with precise tPLH/tPHL ≤ 6.8 ns. Use Value: Maintains signal integrity across 15-cm traces loaded with 10+ CMOS inputs due to 64-mA sink capability. |
| Memory-Mapped Peripheral Interface | Parity-Enabled Bus Transceiver |
Use Scenario: Interfacing microcontroller GPIO ports to external memory-mapped peripherals requiring handshake timing. IC Role / Device Role / Timing Role: Serves as a clocked data latch with asynchronous CLR for reset coordination across peripheral subsystems. Use Value: Guarantees deterministic setup/hold (tsu = 2.1 ns, th = 1 ns) relative to system clock, reducing timing closure effort. | Use Scenario: Implementing bidirectional 9-bit data paths with parity generation in fault-tolerant computing modules. IC Role / Device Role / Timing Role: Functions as one half of a dual-rail bus driver where Q outputs feed parity logic and D inputs receive corrected data. Use Value: Supports concurrent read/write cycles via OE-controlled direction switching without bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 9-bit bus-interface flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT821DBR | 8-bit version with identical timing, drive, and package; lacks ninth bit and associated pins | Suitable only for 8-bit data paths; requires redesign if ninth bit is used for parity or status | Select when system bus width is strictly 8 bits and pin count reduction is prioritized |
| SN74LVC823APWR | 3.3-V only operation; lower drive (–24 mA / +24 mA); different timing (tPLH up to 7.5 ns) | Not interoperable with 5-V TTL buses; requires level-shifting for mixed-voltage systems | Choose only for new 3.3-V designs where voltage scaling and lower power outweigh legacy compatibility |
Compared with SN74ABT823DBR, SN74ABT821DBR offers pin-count reduction at the cost of data width, while SN74LVC823APWR trades 5-V tolerance and drive strength for lower voltage operation - neither is pin-compatible, and both require board-level changes for substitution.
Availability
SN74ABT823DBR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, backplane data buffering, and memory-mapped peripheral interface applications requiring stable component supply and long-term industrial temperature support.
Supply support for SN74ABT823DBR 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT series delivers advanced BiCMOS bus-interface logic with enhanced drive, noise immunity, and power efficiency - designed specifically for robust 5-V system interconnect in harsh environments.
FAQ
What is the operating voltage range for SN74ABT823DBR?
The SN74ABT823DBR operates from 4.5 V to 5.5 V. Operation outside this range may cause functional failure or damage. The device enters a guaranteed high-impedance state when VCC drops below 2.1 V during power-down, preventing bus contention. This specification is validated per TI's SCBS158E datasheet under recommended operating conditions.
Does SN74ABT823DBR support hot insertion into a live bus?
Yes, SN74ABT823DBR supports controlled hot insertion due to its power-up/power-down high-impedance feature: outputs remain in high-Z when VCC is between 0 and 2.1 V. However, OE must be tied to VCC via a pullup resistor (minimum value determined by driver sink capability) to guarantee high-Z above 2.1 V - this behavior is explicitly characterized in the datasheet's DC characteristics table.
What is the maximum clock frequency supported by SN74ABT823DBR?
The SN74ABT823DBR supports a maximum clock frequency of 125 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This value is specified in the timing requirements table of the SCBS158E datasheet and confirmed across the full industrial temperature range (–40°C to +85°C) with appropriate derating for worst-case propagation delays.
How does the clock-enable (CLKEN) input function in SN74ABT823DBR?
In SN74ABT823DBR, CLKEN is an active-low input that gates the clock buffer: when CLKEN is low, the device responds to rising edges on CLK; when CLKEN is high, the clock path is disabled and outputs hold their last state. This allows synchronous data latching control without affecting the master clock distribution network - a feature documented in the function table and logic diagram of the official datasheet.
Can SN74ABT823DBR drive a 50-pF load at 100 MHz?
Yes, SN74ABT823DBR is characterized for CL = 50 pF in its switching characteristics table, with tPLH/tPHL ≤ 6.8 ns at 5 V and 25°C - sufficient for reliable 100-MHz operation assuming proper layout (short traces, ground plane, local decoupling). The 64-mA IOL drive strength ensures fast edge rates into such loads, as verified in TI's SCBS158E test conditions.
SN74ABT823DBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 9
- Clock Frequency:
- 200 MHz
- Max Propagation Delay @ V, Max CL:
- 4.4ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 250 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
SN74ABT823DBR FAQ
1.How can I place an order for SN74ABT823DBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT823DBR 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 SN74ABT823DBR reliable?
The price and inventory of SN74ABT823DBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT823DBR is usually 5 days.
3.What payment methods are accepted for SN74ABT823DBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT823DBR transactions.
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4.How is shipping managed for SN74ABT823DBR?
SN74ABT823DBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT823DBR 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 SN74ABT823DBR?
For technical support, including SN74ABT823DBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT823DBR requirements.
6.How does Aetrix verify that SN74ABT823DBR is sourced from the original manufacturer or authorized distributors?
All SN74ABT823DBR 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 SN74ABT823DBR meets industry standards.
7.What is the process for return or replacement of SN74ABT823DBR?
All SN74ABT823DBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT823DBR, 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 SN74ABT823DBR part is unused and in its original packaging.
Return procedure for SN74ABT823DBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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