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Texas Instruments SN75437ANE
- Part No.:
- SN75437ANE
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN75437ANE.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,317
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Product details
Overview
SN75437ANE from Texas Instruments is a quadruple inverting open-collector peripheral driver IC with high-voltage (70 V min), high-current (500 mA per output), low on-state resistance outputs, common-enable control, and integrated output-clamp diodes for transient suppression. It operates from 4.75–5.25 V and drives relays, solenoids, lamps, and motors in industrial control systems.
For engineers reviewing the SN75437ANE datasheet, SN75437ANE pinout, SN75437ANE application, or SN75437ANE equivalent, this page delivers verified electrical specs, thermal package data, functional truth table, real-world use cases, and two validated alternative drivers for relay/motor interface designs requiring 70-V open-collector switching and CMOS/TTL-compatible inputs.
Technical Context
The SN75437ANE implements four independent NAND-gated inverting drivers, each with an open-collector NPN output stage rated for 70 V off-state voltage and 500 mA continuous output current. A shared active-low enable (G) input disables all outputs simultaneously without power-up/down glitches.
Each input features high-impedance CMOS/TTL compatibility (VIH ≥ 2 V, VIL ≤ 0.8 V), low standby power (21 mW max), and internal clamp diodes to suppress inductive kickback up to 1.25 A peak. The device avoids latch-up under recommended conditions and uses a thermally enhanced 16-pin PDIP (NE) package with dual heat-sink pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output type | Open-collector NPN - enables wired-OR logic and direct connection to external pull-up supplies up to 70 V. |
| Max output voltage (off) | 70 V - supports driving inductive loads like 48-V relays and solenoids without external flyback components. |
| Continuous output current | 500 mA per channel - sufficient for driving 12-V/24-V relays (e.g., 100 Ω coil) or small DC motors directly. |
| Supply voltage range | 4.75–5.25 V - compatible with standard 5-V TTL/CMOS logic rails and regulated 5-V system supplies. |
| Propagation delay | 150–5000 ns - suitable for medium-speed switching (e.g., <100 kHz PWM or sequenced relay actuation). |
| Input compatibility | CMOS and TTL levels - accepts 0.8 V low / 2 V high thresholds, eliminating need for level-shifting buffers. |
| Standby power | 21 mW max - enables low-power idle states in battery-backed or energy-sensitive industrial controllers. |
Pinout & Package
SN75437ANE is housed in a thermally enhanced 16-pin plastic DIP (PDIP-NE) package with dual heat-sink pads connected to GND for improved power dissipation. Package dimensions: 19.80 mm × 6.10 mm × 4.32 mm (L × W × T), JEDEC MS-001 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Input (NAND A) | Individual channel input pins; each forms one input of a NAND gate with G (pin 9). |
| G (pin 9) | Common enable (active low) | Global disable: pulling G low forces all four outputs high-impedance regardless of A inputs. |
| 1Y, 2Y, 3Y, 4Y | Open-collector output | Collectors of NPN transistors; require external pull-up to load supply (up to 70 V) and sink current to GND. |
| 1,2 D / 3,4 D (pins 2 & 15) | Output clamp-diode cathodes | Internally connected to output collectors; provide bidirectional transient suppression when tied to VS (e.g., 35 V rail). |
| VCC (pin 16) | Logic supply | Powers internal logic only (4.75–5.25 V); separate from output supply (VS), enabling mixed-voltage operation. |
| GND (pins 8 & 12) | Ground reference | Dual GND pins tied to heat-sink pads - must be soldered to large copper areas for thermal management at >300 mA. |
Key Features
| Feature | Design Value |
|---|---|
| No power-up/down output glitch | Ensures safe state transitions during system reset or brownout - prevents unintended relay closure or motor start. |
| Integrated output clamp diodes | Eliminates need for external flyback diodes when switching inductive loads like solenoids or relays. |
| Saturating output stage | Delivers low VOL (0.14 V typ @ 250 mA) for minimal power loss and heat generation at full load. |
| High-impedance inputs | Draws ≤10 µA input current - reduces loading on upstream logic and enables direct interface with microcontroller GPIOs. |
| Latch-up immunity | Guaranteed no latch-up within 0°C to 70°C operating range and recommended voltage limits - enhances field reliability. |
Applications
| Industrial Relay Control | DC Solenoid Actuation |
|---|---|
|
Use Scenario: Controlling 24-V/48-V electromagnetic relays in PLC I/O modules and factory automation panels. IC Role / Device Role / Timing Role: Open-collector driver translating 5-V microcontroller signals into isolated 48-V relay coil drive with transient suppression. Use Value: Eliminates external flyback diodes and simplifies PCB layout while supporting 70-V off-state isolation for safety-critical switching. |
Use Scenario: Driving 12-V/24-V linear solenoids in vending machines, fluid control valves, and access lock mechanisms. IC Role / Device Role / Timing Role: High-current sink driver enabling precise on/off timing (tPHL ≤ 500 ns) for fast-acting mechanical actuation. Use Value: 500 mA per channel sustains solenoid hold current without external transistors; clamp diodes prevent back-EMF damage. |
| LED Array Signaling | Stepper Motor Phase Control |
|
Use Scenario: Switching high-brightness LED strings (e.g., status indicators, signage) powered from 12–36 V supplies. IC Role / Device Role / Timing Role: Constant-current sink for LED anodes tied to positive rail; enables multiplexed or PWM-dimmed arrays. Use Value: 70-V rating allows direct interface to 36-V LED strings; low VOL minimizes forward-voltage drop and improves efficiency. |
Use Scenario: Driving unipolar stepper motor windings in motion control subsystems for printers, scanners, and CNC stages. IC Role / Device Role / Timing Role: Four-channel phase driver accepting step/direction logic to energize motor coils sequentially. Use Value: Common-enable (G) allows synchronized winding deactivation; integrated clamping protects against inductive spikes during direction reversal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage open-collector peripheral driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ULN2803A | Eight-channel vs. four-channel; identical 500 mA/70 V rating, but higher input threshold (2.3 V VIH min) and no common-enable pin. | Lacks global disable (G) function - requires individual enable logic or software coordination for simultaneous shutdown. | Choose ULN2803A when eight outputs are needed and G functionality is unnecessary; verify VIH compatibility with source logic. |
| TPIC6B595 | Serial-input shift register + 8-bit open-drain outputs; 500 mA/60 V rating; requires clock/data control instead of parallel inputs. | Reduces MCU GPIO count but adds timing complexity; lacks real-time parallel control and common-enable capability. | Prefer TPIC6B595 for space-constrained designs needing serial expansion; avoid if deterministic parallel enable/disable is required. |
Compared with ULN2803A and TPIC6B595, the SN75437ANE uniquely provides four parallel inputs with a dedicated active-low global enable (G), making it optimal for synchronous multi-load control where immediate, hardware-based shutdown is critical - such as emergency stop circuits or coordinated solenoid banks.
Availability
SN75437ANE is available at Aetrix Electronics and suitable for industrial relay control, DC solenoid actuation, and LED array signaling requiring stable component supply, long-lifecycle support, and legacy-compatible through-hole packaging.
Supply support for SN75437ANE 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade performance.
The SN75437ANE belongs to TI's legacy peripheral driver product line, engineered specifically for robust, high-voltage, high-current interfacing between digital logic and electromechanical loads in harsh industrial environments.
FAQ
What is the maximum output voltage rating of the SN75437ANE?
The SN75437ANE is rated for a minimum off-state output voltage of 70 V, meaning each open-collector output can safely withstand up to 70 V when in the high-impedance (off) state. This specification ensures reliable operation when switching 48-V relays or other high-voltage inductive loads without external voltage clamping.
Does the SN75437ANE require external flyback diodes when driving relays?
No - the SN75437ANE integrates output clamp diodes (pins 2 and 15) that provide bidirectional transient suppression. When the output supply (VS) is properly connected, these diodes absorb inductive kickback energy, eliminating the need for discrete flyback diodes in typical relay or solenoid applications.
What is the function of the G (enable) pin on the SN75437ANE?
The G pin (pin 9) is an active-low common-enable input that disables all four outputs simultaneously when pulled low. This feature allows hardware-level global shutdown - for example, cutting power to all relays during fault conditions - without requiring individual signal control or firmware intervention.
Can the SN75437ANE operate from a 3.3-V logic supply?
No - the SN75437ANE requires a VCC supply of 4.75–5.25 V and is not specified for 3.3-V operation. Its input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) assume 5-V logic compatibility; using it with 3.3-V microcontrollers may cause unreliable switching unless level translation is added.
How does thermal management work for the SN75437ANE in high-current operation?
The SN75437ANE uses a thermally enhanced NE-package with dual GND pins (pins 8 and 12) connected to internal heat-sink pads. For reliable operation above 300 mA per channel, these pins must be soldered to large copper pour areas on the PCB to dissipate up to 2075 mW at 25°C ambient - derating linearly to 1328 mW at 70°C.
SN75437ANE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Peripheral Driver
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- -, 500mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
SN75437ANE FAQ
1.How can I place an order for SN75437ANE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75437ANE 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 SN75437ANE reliable?
The price and inventory of SN75437ANE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75437ANE is usually 5 days.
3.What payment methods are accepted for SN75437ANE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75437ANE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75437ANE?
SN75437ANE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75437ANE 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 SN75437ANE?
For technical support, including SN75437ANE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75437ANE requirements.
6.How does Aetrix verify that SN75437ANE is sourced from the original manufacturer or authorized distributors?
All SN75437ANE 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 SN75437ANE meets industry standards.
7.What is the process for return or replacement of SN75437ANE?
All SN75437ANE units undergo pre-shipment inspection (PSI). If there is an issue with SN75437ANE, 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 SN75437ANE part is unused and in its original packaging.
Return procedure for SN75437ANE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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