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Texas Instruments SN75451BDRG4
- Part No.:
- SN75451BDRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN75451BDRG4.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,641
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Product details
Overview
SN75451BDRG4 from Texas Instruments is a dual-channel AND-gate peripheral driver IC designed for high-current, high-speed switching in TTL-compatible systems. It delivers 300 mA per channel, supports up to 30 V output voltage, features open-collector outputs with diode-clamped TTL inputs, and operates across 0°C to 70°C - commonly used to interface microcontrollers with LED arrays and industrial solenoids.
For engineers reviewing the SN75451BDRG4 datasheet, SN75451BDRG4 pinout, SN75451BDRG4 application, or SN75451BDRG4 equivalent, key selection criteria include its AND-logic gating behavior, 25 ns typical propagation delay at 5 V, latch-up immunity at 20 V/300 mA, and SOIC-8 package compatibility with standard PCB assembly processes.
Technical Context
The SN75451BDRG4 integrates two independent AND-gated npn transistor drivers, where both inputs must be high to activate the corresponding open-collector output. Its internal base-emitter resistors (500 Ω) ensure stable turn-on and prevent latch-up under transient overvoltage conditions up to 20 V.
It operates exclusively from a single 5 V supply (4.75–5.25 V), accepts TTL-level inputs (VIH ≥ 2 V, VIL ≤ 0.8 V), and drives loads requiring up to 30 V off-state voltage swing - making it suitable for interfacing low-voltage logic with higher-voltage peripherals without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | AND gate per channel: output active-low only when both inputs are high |
| Max Output Current | 300 mA continuous per channel - sufficient for driving LEDs, relays, and small solenoids |
| Output Voltage Range | 0 V to 30 V off-state - enables direct control of 24 V industrial loads |
| Propagation Delay | 25 ns typical (tPLH/tPHL at 5 V, 200 mA, 15 pF) - supports high-speed digital buffering |
| Supply Voltage | 4.75–5.25 V - tightly regulated 5 V rail required; not tolerant of 3.3 V logic supplies |
| Operating Temperature | 0°C to 70°C - commercial-grade rating; excludes extended or automotive temperature ranges |
| Input Compatibility | TTL-diode-clamped inputs - eliminates need for external pull-ups or clamping diodes |
Pinout & Package
SN75451BDRG4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with standard 1.27 mm pitch and gull-wing leads compatible with reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Channel 1 Logic Input A | TTL-compatible input; must be driven high (≥2 V) and low (≤0.8 V); floating state invalid |
| 1B | Channel 1 Logic Input B | Second AND input for Channel 1; both 1A and 1B must be high to enable 1Y |
| 1Y | Channel 1 Open-Collector Output | Sinks current to GND when enabled; requires external pull-up to load supply (up to 30 V) |
| GND | Ground Reference | Common return path for logic and output current; must be low-impedance |
| VCC | Positive Supply | 5 V ±2.5% supply input; bypass with 0.1 µF capacitor near pin |
| 2A | Channel 2 Logic Input A | Independent AND input for second driver channel; electrically isolated from Channel 1 |
| 2B | Channel 2 Logic Input B | Second AND input for Channel 2; unused inputs must be tied to VCC or GND |
| 2Y | Channel 2 Open-Collector Output | Functionally identical to 1Y; supports independent high-side load switching |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 20 V/300 mA | Guarantees robust operation during inductive load switching transients without destructive failure |
| Diode-clamped TTL inputs | Eliminates need for external input protection components; simplifies board layout and BOM |
| Open-collector outputs | Enables wired-OR logic, mixed-voltage interfacing, and flexible load connection topologies |
| High-speed switching (25 ns) | Supports digital signal buffering at frequencies up to ~20 MHz without timing degradation |
| Characterized for 300 mA drive | Validated output current capability ensures reliable operation under sustained load conditions |
Applications
| LED Driver Interface | Industrial Solenoid Control |
|---|---|
Use Scenario: Driving multi-segment LED displays from a 5 V microcontroller with current limiting via external resistors. IC Role / Device Role / Timing Role: Dual-channel AND driver acting as logic-gated current sink for common-anode LED arrays. Use Value: Enables simultaneous activation of multiple LEDs using compact 8-pin SOIC footprint and eliminates need for discrete transistors or level shifters. | Use Scenario: Controlling 24 V DC solenoids in factory automation I/O modules with microcontroller GPIO isolation. IC Role / Device Role / Timing Role: High-current open-collector switch translating TTL logic states into 24 V load actuation signals. Use Value: Provides 300 mA per channel at 24 V with latch-up immunity, reducing risk of field failures during coil back-EMF events. |
| Relay Driver Circuit | Memory Address Buffer |
Use Scenario: Driving electromagnetic relays in programmable logic controllers where dual AND logic gates enable enable/disable sequencing. IC Role / Device Role / Timing Role: Dual peripheral driver providing controlled current sinking for relay coils with precise logic coordination. Use Value: Ensures clean relay activation timing (25 ns propagation) and prevents unintended coil energization via floating input prevention. | Use Scenario: Buffering address lines in legacy 8-bit memory subsystems requiring fan-out expansion and noise immunity. IC Role / Device Role / Timing Role: High-speed logic buffer amplifying TTL address signals to drive multiple memory chip inputs. Use Value: Delivers 300 mA drive strength and 25 ns delay to maintain setup/hold timing margins across distributed memory buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual AND-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75451BD | Same die, identical electrical specs; differs only in tape-and-reel packaging (no G4 suffix) | No functional difference; same SOIC-8 footprint and thermal performance | Select SN75451BD for non-G4-compliant supply chains or smaller quantity requirements |
| SN75452BDRG4 | NAND logic function instead of AND; otherwise identical pinout, ratings, and timing | Requires inverted control logic; unsuitable where positive-logic AND behavior is mandatory | Choose only if system design accommodates NAND truth table and input inversion |
Compared with SN75451BDRG4, SN75451BD offers identical functionality in alternate packaging, while SN75452BDRG4 provides NAND logic - requiring firmware or schematic changes to preserve correct boolean behavior in AND-dependent systems.
Availability
SN75451BDRG4 is available at Aetrix Electronics and suitable for industrial automation, LED lighting control, and embedded I/O expansion requiring stable component supply, long-term manufacturability, and RoHS-compliant SOIC packaging.
Supply support for SN75451BDRG4 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 connectivity technologies with over 90 years of innovation in industrial, automotive, and communications markets.
The SN7545xB family was developed to replace legacy SN75450-series drivers with enhanced latch-up immunity and tighter parametric control - targeting cost-sensitive, high-reliability peripheral interfacing in commercial-grade systems.
FAQ
What logic function does the SN75451BDRG4 implement?
The SN75451BDRG4 implements a dual-channel AND gate with open-collector outputs. For each channel, the output (1Y or 2Y) sinks current only when both corresponding inputs (1A/1B or 2A/2B) are at valid high logic levels (≥2 V). This behavior is confirmed in the device function table and logic diagram in the official TI datasheet SLRS021E.
Can SN75451BDRG4 operate from a 3.3 V supply?
No, SN75451BDRG4 cannot operate reliably from a 3.3 V supply. Its recommended operating conditions specify VCC = 4.75–5.25 V, and absolute maximum ratings limit VI to 5.5 V. Driving inputs from 3.3 V logic may fail to meet the 2 V VIH threshold, resulting in undefined output states. The SN75451BDRG4 requires a true 5 V supply.
Does SN75451BDRG4 require external pull-up resistors on its outputs?
Yes, SN75451BDRG4 requires external pull-up resistors on both 1Y and 2Y outputs because they are open-collector. The resistor value depends on load voltage and desired rise time - for example, a 10 kΩ resistor to 24 V yields ~2.4 mA quiescent current. Pull-ups are mandatory for proper logic-high assertion and are explicitly required in all application schematics in the datasheet.
What is the maximum safe load voltage for SN75451BDRG4 outputs?
The maximum safe off-state output voltage for SN75451BDRG4 is 30 V, as specified in the Absolute Maximum Ratings table. Exceeding this voltage risks breakdown of the output transistor's collector-emitter junction. In practice, 24 V loads are most common, and the device maintains latch-up immunity at 20 V/300 mA - a key reliability specification verified per test Figure 7-3.
How does SN75451BDRG4 differ from SN75452BDRG4?
SN75451BDRG4 and SN75452BDRG4 share identical package, pinout, ratings, and timing, but differ in logic function: SN75451BDRG4 is AND, while SN75452BDRG4 is NAND. Their truth tables are complementary - e.g., SN75451BDRG4 outputs low only when both inputs are high, whereas SN75452BDRG4 outputs low only when both inputs are high. Substitution requires logic inversion in firmware or hardware.
SN75451BDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Peripheral Driver
- Number of Elements:
- 2
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- 100µA, 300mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SN75451BDRG4 FAQ
1.How can I place an order for SN75451BDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75451BDRG4 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 SN75451BDRG4 reliable?
The price and inventory of SN75451BDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75451BDRG4 is usually 5 days.
3.What payment methods are accepted for SN75451BDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75451BDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75451BDRG4?
SN75451BDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75451BDRG4 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 SN75451BDRG4?
For technical support, including SN75451BDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75451BDRG4 requirements.
6.How does Aetrix verify that SN75451BDRG4 is sourced from the original manufacturer or authorized distributors?
All SN75451BDRG4 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 SN75451BDRG4 meets industry standards.
7.What is the process for return or replacement of SN75451BDRG4?
All SN75451BDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN75451BDRG4, 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 SN75451BDRG4 part is unused and in its original packaging.
Return procedure for SN75451BDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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