My Inquiry
My Account
Texas Instruments SN75471DR
- Part No.:
- SN75471DR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN75471DR.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN75471DR from Texas Instruments is a dual peripheral AND driver IC designed for high-voltage, high-current switching in industrial and embedded control systems. It delivers 300 mA continuous output current per channel, supports up to 70 V off-state output voltage, operates over 0°C to 70°C, and features TTL-compatible diode-clamped inputs - enabling direct interface with logic controllers in relay, lamp, and MOSFET driver applications.
For engineers reviewing the SN75471DR datasheet, SN75471DR pinout, SN75471DR application, or SN75471DR equivalent, key selection criteria include its 70 V output breakdown rating, 300 mA drive capability, SOIC-8 package compatibility, and AND-gate logic function with open-collector NPN outputs.
Technical Context
The SN75471DR integrates two independent AND-gate drivers, each with TTL-compatible inputs driving internal NPN transistor bases. Its output stage uses open-collector NPN transistors rated for 70 V off-state voltage and 300 mA continuous conduction without latch-up at 55 V.
It operates from a single 4.75 V–5.25 V supply, exhibits propagation delays of 25–55 ns (tPHL/tPLH), and maintains low-level output voltage ≤0.7 V at 300 mA load - confirming suitability for driving inductive loads with external flyback protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual AND gate with open-collector NPN outputs (positive logic Y = A·B) |
| Output Current | 300 mA continuous per channel - sufficient for relays, lamps, and small solenoids |
| Off-State Output Voltage | 70 V - enables safe switching of higher-voltage loads without external clamping |
| Supply Voltage Range | 4.75 V to 5.25 V - compatible with standard 5 V TTL/CMOS logic rails |
| Operating Temperature | 0°C to 70°C - validated for commercial and industrial ambient environments |
| Propagation Delay | 25–55 ns - supports medium-speed digital control (e.g., stepper motor step timing) |
| Input Compatibility | TTL-compatible with diode-clamped inputs - eliminates need for level-shifting circuitry |
Pinout & Package
SN75471DR is housed in an 8-pin SOIC (D) package with 1.27 mm lead pitch, 3.9 mm body width, and 1.75 mm max height - optimized for automated assembly and thermal reliability in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B | Input A/B for Channel 1 | TTL-compatible AND gate inputs; internally pulled up via 4 kΩ resistors |
| 1Y | Open-collector output for Channel 1 | NPN collector output - requires external pull-up to load supply (up to 70 V) |
| GND (Pin 4) | Ground reference | Common emitter return path for both NPN output transistors |
| VCC (Pin 5) | Positive supply | 5 V logic supply only - not connected to output load path |
| 2A, 2B | Input A/B for Channel 2 | Independent AND gate inputs identical in function to Pins 1A/1B |
| 2Y | Open-collector output for Channel 2 | Second independent high-voltage switch output, electrically isolated from 1Y |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 55 V after 300 mA conduction | Enables robust operation with inductive loads without destructive failure under transient overvoltage |
| 70 V off-state output voltage rating | Allows direct driving of 24 V, 48 V, or 60 V DC loads without external voltage clamping components |
| TTL-compatible diode-clamped inputs | Accepts standard 0 V/5 V logic signals without external biasing or protection networks |
| Plastic SOIC-8 package with copper lead frame | Improves thermal dissipation vs. standard SOIC - supports 464 mW power rating at 70°C ambient |
| Dual independent AND-gate drivers | Permits synchronous or asynchronous control of two separate high-side or low-side switched loads |
Applications
| Relay Driver | Lamp Driver |
|---|---|
Use Scenario: Controlling 24 VDC industrial relays in PLC I/O modules. IC Role / Device Role / Timing Role: Dual AND gate drives relay coils via open-collector outputs with external 24 V pull-up. Use Value: Eliminates discrete transistor arrays while maintaining 70 V standoff for back-EMF suppression. |
Use Scenario: Switching incandescent and LED indicator lamps in instrumentation panels. IC Role / Device Role / Timing Role: Provides logic-gated on/off control of multiple panel lamps using TTL input signals. Use Value: Supports 300 mA per lamp - sufficient for multi-LED strings or 12–24 V filament lamps without heat sinks. |
| MOSFET Gate Driver | Memory/Bus Driver |
Use Scenario: Level-shifting and current-boosting for NMOS or depletion-mode MOSFET gates. IC Role / Device Role / Timing Role: Acts as a 5 V logic-to-high-voltage interface, sourcing gate charge via open-collector pull-down. Use Value: Enables direct drive of MOSFETs requiring >5 V gate swing, with 55 V latch-up immunity during switching transients. |
Use Scenario: Enabling/disabling memory address or data bus lines in legacy microcomputer systems. IC Role / Device Role / Timing Role: Functions as a dual AND-enabled buffer to gate memory access signals based on chip-select logic. Use Value: Propagation delay ≤55 ns ensures timing compliance with 10–20 MHz bus cycles in 8-bit embedded systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-voltage driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75471P | Same logic function and electrical specs, but in 8-pin PDIP package with higher 640 mW power rating at 70°C | Better suited for prototyping or through-hole assembly; lower thermal resistance than SOIC | Select SN75471P for manual soldering, breadboarding, or higher ambient temperature margin where board space allows |
| ULN2003A | 7-channel Darlington array with 500 mA rating per channel, but slower switching (1 µs tPLH) and no logic gating | Used for unidirectional high-current loads without logic combination; lacks AND functionality | Choose ULN2003A when driving multiple independent loads without logic interaction, especially at >500 mA demand |
Compared with SN75471P, SN75471DR offers surface-mount compatibility and smaller footprint; compared with ULN2003A, it provides integrated AND logic and faster switching but fewer channels and lower per-channel current.
Availability
SN75471DR is available at Aetrix Electronics and suitable for industrial control systems, relay interface modules, and legacy embedded design refreshes requiring stable component supply and long-term manufacturability.
Supply support for SN75471DR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN75471DR belongs to TI's legacy peripheral driver family, engineered for high-voltage interfacing between logic controllers and electromechanical or power-switching loads in cost-sensitive industrial equipment.
FAQ
What logic function does the SN75471DR implement?
The SN75471DR implements two independent AND gates with open-collector NPN outputs. Each channel outputs a low state (sinking current) only when both inputs are high (positive logic Y = A·B). This enables logic-enabled switching of external loads tied to a positive supply via the collector terminal.
Can the SN75471DR drive inductive loads like relays directly?
Yes - the SN75471DR can drive relays directly when used with external flyback diodes. Its 70 V off-state output voltage and latch-up immunity at 55 V after 300 mA conduction make it robust against inductive kickback, provided the external diode is placed across the relay coil with cathode to VLOAD.
What is the maximum continuous output current per channel of the SN75471DR?
The SN75471DR is characterized for 300 mA continuous output current per channel at 0°C to 70°C ambient. At 70°C, its SOIC-8 package supports 464 mW total power dissipation - limiting practical sustained current depending on load voltage and thermal layout.
Does the SN75471DR require external pull-up resistors on its outputs?
Yes - the SN75471DR features open-collector NPN outputs (1Y and 2Y), so external pull-up resistors (or direct connection to a load supply) are mandatory to establish a defined high state. The pull-up voltage may be up to 70 V, independent of the 5 V VCC supply.
Is the SN75471DR pin-compatible with the SN75472DR or SN75473DR?
No - although all three share identical pinouts and package, they implement different logic functions: SN75471DR is AND, SN75472DR is NAND, and SN75473DR is OR. Swapping them changes system logic behavior and may cause functional failure without circuit redesign.
SN75471DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Peripheral Driver
- Number of Elements:
- 2
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -, 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
SN75471DR FAQ
1.How can I place an order for SN75471DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75471DR 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 SN75471DR reliable?
The price and inventory of SN75471DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75471DR is usually 5 days.
3.What payment methods are accepted for SN75471DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75471DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75471DR?
SN75471DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75471DR 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 SN75471DR?
For technical support, including SN75471DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75471DR requirements.
6.How does Aetrix verify that SN75471DR is sourced from the original manufacturer or authorized distributors?
All SN75471DR 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 SN75471DR meets industry standards.
7.What is the process for return or replacement of SN75471DR?
All SN75471DR units undergo pre-shipment inspection (PSI). If there is an issue with SN75471DR, 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 SN75471DR part is unused and in its original packaging.
Return procedure for SN75471DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN75471DR 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…
