My Inquiry
My Account
Texas Instruments SN75451BPE4
- Part No.:
- SN75451BPE4
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
SN75451BPE4.pdf
- Description:
- 30-V DUAL OUTPUT DRIVER WITH AND
- Quantity:
- Payment:
- Shipping:
Inventory:3,921
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN75451BPE4 from Texas Instruments is a dual-channel AND-gate peripheral driver IC designed for high-current, high-speed switching in TTL-compatible logic systems. It delivers up to 300 mA per channel, supports output voltages up to 30 V, features open-collector outputs with diode-clamped TTL inputs, and operates across 0°C to 70°C - commonly used to interface microcontrollers with lamps, LEDs, or relay loads.
For engineers reviewing the SN75451BPE4 datasheet, SN75451BPE4 pinout, SN75451BPE4 application, or SN75451BPE4 equivalent, key selection criteria include its AND-logic gate structure, 300 mA continuous output current rating, 30 V off-state output voltage tolerance, open-collector configuration requiring external pull-up, and PDIP-8 package compatibility with through-hole prototyping and industrial control boards.
Technical Context
The SN75451BPE4 integrates two independent AND-gate-driven NPN transistor output stages, each with internal base resistors and diode-clamped inputs for direct TTL-level interfacing. Its logic function (Y = A·B) enables active-low enabling of high-side loads when both inputs are high, with outputs sinking current to ground.
It uses open-collector topology requiring external pull-up resistors on 1Y and 2Y pins, supports simultaneous dual-channel operation at full rated current, and is characterized for latch-up immunity up to 20 V after conducting 300 mA - critical for driving inductive or capacitive peripherals without destructive feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | AND gate per channel (Y = A·B), positive logic; output active low when both inputs high |
| Max Output Current | 300 mA continuous per channel - sufficient to drive relays, lamps, or LED strings directly |
| Output Voltage Rating | 30 V off-state - enables use with 24 V industrial supplies and automotive lighting |
| Input Compatibility | TTL-compatible with diode-clamped inputs - accepts standard 5 V logic without level-shifting |
| Operating Temperature | 0°C to 70°C - suitable for commercial and industrial embedded control environments |
| Supply Voltage | 4.75 V to 5.25 V - tightly regulated 5 V rail required for guaranteed logic thresholds and output saturation |
| Propagation Delay | 18–25 ns (low-to-high/high-to-low) at 5 V - supports high-speed digital buffering up to ~20 MHz |
Pinout & Package
SN75451BPE4 is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 9.81 mm × 6.35 mm body size and through-hole mounting. Pin 1 is marked by a notch or dot; pin numbering follows standard DIP convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Channel 1 Input A | First logic input to AND gate controlling output 1Y; must be driven to defined high/low state |
| 1B | Channel 1 Input B | Second logic input to AND gate controlling output 1Y; floating inputs cause undefined output |
| 1Y | Channel 1 Open-Collector Output | Sinks current to GND when both 1A and 1B are high; requires external pull-up resistor |
| GND | Ground Reference | Common return path for logic inputs, supply, and output current; must be low-impedance |
| VCC | Positive Supply | 5 V power rail for internal logic and biasing; bypass with 0.1 µF capacitor near pin |
| 2B | Channel 2 Input B | Second logic input to AND gate controlling output 2Y; identical behavior to 1B |
| 2A | Channel 2 Input A | First logic input to AND gate controlling output 2Y; identical behavior to 1A |
| 2Y | Channel 2 Open-Collector Output | Independent sink output mirroring 1Y functionality; supports dual-load control |
Key Features
| Feature | Design Value |
|---|---|
| Open-collector outputs | Enable flexible voltage translation and wired-OR logic; support mixed-voltage system interfacing |
| Diode-clamped TTL inputs | Prevent negative voltage overshoot and simplify input protection design in noisy environments |
| No latch-up at 20 V | Guarantees robust operation during transient overvoltage events common in relay or motor switching |
| High-speed switching (≤25 ns) | Reduces timing uncertainty in synchronous peripheral enable/disable sequences |
| 300 mA per channel rating | Eliminates need for external driver transistors in medium-power applications like solenoid or lamp control |
Applications
| Industrial Relay Control | LED Array Driver |
|---|---|
Use Scenario: Driving 24 V DC relays in PLC I/O modules where MCU GPIOs lack current capability. IC Role / Device Role / Timing Role: Logic-level translator and current amplifier; enables precise ON/OFF timing via AND-gated enable signals. Use Value: Eliminates discrete transistor stages while maintaining TTL compatibility and reducing board space by 40% vs. discrete solutions. | Use Scenario: Controlling multiplexed 12 V LED displays in instrumentation panels with brightness modulation. IC Role / Device Role / Timing Role: High-current sink driver with fast edge rates; synchronizes LED column activation in scanning architectures. Use Value: Supports >10 kHz refresh rates due to sub-25 ns propagation delay, minimizing visible flicker in human-viewable displays. |
| Memory Address Buffer | High-Speed Logic Interface |
Use Scenario: Buffering address lines between 5 V microcontroller and 30 V EPROM or flash memory in legacy industrial controllers. IC Role / Device Role / Timing Role: Level-shifting buffer with AND logic gating; isolates MCU from higher-voltage memory bus noise. Use Value: Enables safe 30 V tolerant operation without additional clamping diodes or isolation circuitry. | Use Scenario: Interfacing FPGA I/O banks to legacy TTL peripherals requiring 300 mA drive strength and strict timing alignment. IC Role / Device Role / Timing Role: Low-skew dual-channel logic buffer; preserves signal integrity across parallel data paths. Use Value: Matches FPGA output slew rates while providing current gain, reducing inter-channel skew to <5 ns. |
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 | SOIC-8 package; same electrical specs but surface-mount only | Preferred for automated PCB assembly and space-constrained designs | Select SN75451BD when using SMT processes and thermal management allows SOIC footprint |
| SN75452BPE4 | NAND logic function instead of AND; otherwise identical pinout, ratings, and package | Requires inverted control logic; used where active-low enable is preferred | Choose SN75452BPE4 only if system architecture mandates NAND-based enable sequencing |
Compared with SN75451BD and SN75452BPE4, the SN75451BPE4 provides through-hole PDIP compatibility for prototyping and repairability, retains the AND logic function needed for positive-enable systems, and avoids NAND inversion overhead in firmware or external logic.
Availability
SN75451BPE4 is available at Aetrix Electronics and suitable for industrial relay control, LED array driving, memory address buffering, and high-speed logic interface applications requiring stable component supply and long-term obsolescence management.
Supply support for SN75451BPE4 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 over 50 years of innovation in industrial and automotive electronics.
The SN7545xB family was developed to replace legacy SN75450-series drivers, delivering improved latch-up immunity, tighter timing specs, and consistent 300 mA drive capability for TTL-based peripheral interfacing in commercial temperature environments.
FAQ
What logic function does the SN75451BPE4 implement?
The SN75451BPE4 implements a dual-channel AND gate function: output Y goes low (active) only when both inputs A and B are high. Each channel operates independently - 1Y responds to 1A/1B, and 2Y responds to 2A/2B. This behavior is confirmed in the device's functional truth table and logic diagram, and applies specifically to the SN75451BPE4 variant within the SN7545xB family.
Can SN75451BPE4 drive a 24 V relay coil directly?
Yes, SN75451BPE4 can drive a 24 V relay coil directly when used with an appropriate external pull-up resistor on the 1Y or 2Y pin. Its 30 V off-state output voltage rating and 300 mA continuous sink current capability meet typical 24 V relay coil requirements (e.g., 100–200 mA coils). Ensure the relay coil is connected between VSUP (24 V) and 1Y/2Y, with GND completing the path.
Does SN75451BPE4 require external pull-up resistors on its outputs?
Yes, SN75451BPE4 requires external pull-up resistors on both 1Y and 2Y pins because it features open-collector outputs. Without pull-ups, outputs remain floating when inactive. Typical values range from 1 kΩ to 10 kΩ depending on load voltage and speed requirements; a 4.7 kΩ resistor is commonly used with 5 V logic, while higher values apply for 24 V systems.
What is the maximum operating temperature for SN75451BPE4?
The SN75451BPE4 is characterized for operation from 0°C to 70°C ambient temperature - the commercial-grade specification for the SN7545xB series. This is explicitly stated in the device comparison table and recommended operating conditions section of the datasheet, distinguishing it from the military-grade SN5545xB variants rated for –55°C to 125°C.
Is SN75451BPE4 pin-compatible with SN75452BPE4?
Yes, SN75451BPE4 is pin-compatible with SN75452BPE4: both use the same PDIP-8 package, identical pinout (1A, 1B, 1Y, GND, VCC, 2B, 2A, 2Y), and share all absolute maximum ratings and thermal specifications. The sole functional difference is logic type - AND vs. NAND - so hardware layout remains unchanged, but firmware or upstream logic must account for inverted output behavior in the SN75452BPE4 case.
SN75451BPE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
SN75451BPE4 FAQ
1.How can I place an order for SN75451BPE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75451BPE4 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 SN75451BPE4 reliable?
The price and inventory of SN75451BPE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75451BPE4 is usually 5 days.
3.What payment methods are accepted for SN75451BPE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75451BPE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75451BPE4?
SN75451BPE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75451BPE4 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 SN75451BPE4?
For technical support, including SN75451BPE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75451BPE4 requirements.
6.How does Aetrix verify that SN75451BPE4 is sourced from the original manufacturer or authorized distributors?
All SN75451BPE4 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 SN75451BPE4 meets industry standards.
7.What is the process for return or replacement of SN75451BPE4?
All SN75451BPE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN75451BPE4, 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 SN75451BPE4 part is unused and in its original packaging.
Return procedure for SN75451BPE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN75451BPE4 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…
