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Texas Instruments SN75155PE4
- Part No.:
- SN75155PE4
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
SN75155PE4.pdf
- Description:
- IC TRANSCEIVER FULL 1/1 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,056
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Product details
Overview
SN75155PE4 from Texas Instruments is a dual-function RS-232 line driver and receiver IC designed for EIA/TIA-232-E and ITU V.28 compliant serial interfaces. It integrates a TTL-compatible driver with 10-mA current limiting, a noise-filtered receiver with hysteresis (VIT+ = 1.9 V typ, VIT− = 0.95 V typ), built-in 5-V regulator, and power-off output resistance of 300 Ω. It operates across ±4.5 V to ±15 V supplies and supports industrial temperature range (0°C to 70°C).
For engineers reviewing the SN75155PE4 datasheet, SN75155PE4 pinout, SN75155PE4 application, or SN75155PE4 equivalent, this device is selected for legacy RS-232 interface design where robust noise immunity, wide supply tolerance, and integrated regulation are required - especially in point-of-sale terminals, industrial PLCs, and medical diagnostic equipment with long cable runs.
Technical Context
The SN75155PE4 implements a bipolar-based driver stage similar to SN75188 and a receiver stage comparable to SN75189A, both optimized for EIA/TIA-232-E compliance. Its response control (RTC) input enables external resistor or resistor-bias network configuration to shift input thresholds and suppress noise via hysteresis tuning.
It features independent VCC+ and VCC− rails (±4.5 V to ±15 V), TTL-level driver inputs, and receiver inputs rated for −30 V to +30 V. The internal 5-V regulator powers internal circuitry, while power-off output resistance (300 Ω typ) prevents bus contention during system shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4.5 V to ±15 V - supports wide-input legacy systems without external regulators |
| Driver Output Current Limit | 10 mA - protects against short-circuit damage on RS-232 lines |
| Receiver Input Threshold Hysteresis | 0.6 V - improves noise margin in electrically noisy industrial environments |
| Power-Off Output Resistance | 300 Ω typ - maintains high-impedance bus state during power loss or reset |
| Propagation Delay (Driver) | 80–480 ns - ensures timing compatibility with standard UART baud rates up to 1 Mbps |
| Operating Temperature | 0°C to 70°C - qualified for commercial/industrial embedded applications |
| Input Voltage Range (Receiver) | −30 V to +30 V - withstands large transients and ground potential differences |
Pinout & Package
SN75155PE4 is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin 1 is located at the left end of the top row when viewed from the top with notch or dot oriented upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DA) | Driver Input A | TTL-compatible input controlling driver output DA; accepts 0.8 V low / 2 V high logic levels |
| 2 (RA) | Receiver Input A | Differential-capable input for RS-232 signal A; accepts −30 V to +30 V input range |
| 3 (RY) | Receiver Output Y | Active-high TTL output reflecting RA state; drives 0.4 mA load at VO(L) ≤ 0.3 V |
| 4 (GND) | Signal Ground | Reference for receiver inputs and driver outputs; separate from power ground in split-rail systems |
| 5 (RTC) | Response Control | Configures receiver hysteresis and threshold via external resistor/bias; enables noise filtering |
| 6 (DY) | Driver Output Y | RS-232-compliant output (±15 V swing); current-limited to 10 mA, short-circuit protected |
| 7 (VCC+) | Positive Supply Rail | Provides +4.5 V to +15 V for driver/receiver core; powers internal 5-V regulator |
| 8 (VCC−) | Negative Supply Rail | Provides −4.5 V to −15 V for driver/receiver core; enables true bipolar RS-232 voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 5-V regulator | Stabilizes internal biasing without external LDO; reduces BOM count in dual-rail designs |
| Response control (RTC) input | Enables user-configurable hysteresis and input threshold shifting for noise-prone environments |
| Power-off output resistance | 300 Ω typical ensures safe bus release during brown-out or hot-unplug scenarios |
| Wide supply voltage range | ±4.5 V to ±15 V accommodates aging power supplies and battery-backed systems |
| TTL-compatible driver inputs | Accepts standard 0.8 V / 2 V logic thresholds - eliminates need for level-shifting buffers |
Applications
| Industrial PLC Communication Interface | Point-of-Sale Terminal Serial Port |
|---|---|
Use Scenario: Connecting programmable logic controllers to host SCADA systems over 15-meter shielded RS-232 cables in factory-floor environments with motor drive noise. IC Role / Device Role / Timing Role: SN75155PE4 acts as bidirectional line interface - driver converts TTL UART signals to ±12 V RS-232, receiver converts incoming RS-232 to TTL logic with hysteresis filtering. Use Value: 0.6 V hysteresis and −30 V to +30 V input tolerance prevent false triggering from EFT bursts and ground loops. |
Use Scenario: Enabling serial communication between cash register mainboard and peripheral receipt printer in retail kiosks with intermittent AC power. IC Role / Device Role / Timing Role: SN75155PE4 serves as isolated RS-232 transceiver - driver delivers robust ±15 V output under varying VCC conditions, receiver maintains valid TTL output during brown-outs. Use Value: Built-in 5-V regulator and power-off 300 Ω output resistance ensure reliable handshaking even during partial power loss. |
| Medical Diagnostic Equipment Interface | Legacy Test & Measurement Instrumentation |
Use Scenario: Interfacing ultrasound machine control board to external PC for firmware updates and log export via RS-232 port. IC Role / Device Role / Timing Role: SN75155PE4 provides galvanically isolated signal translation - driver handles TTL-to-RS232 conversion, receiver decodes PC-side commands with noise rejection. Use Value: RTC-configurable hysteresis and ±15 V output swing meet IEC 60601-1 EMC immunity requirements for medical devices. |
Use Scenario: Retrofitting vintage oscilloscopes and spectrum analyzers with modern PC connectivity using RS-232 debug ports. IC Role / Device Role / Timing Role: SN75155PE4 replaces obsolete transceivers in repair and calibration workflows - supports legacy ±12 V signaling and TTL microcontroller interfacing. Use Value: Pin-compatible replacement for SN75188/SN75189A combinations; simplifies redesign with single-package integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 line driver and receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX232ACPE+ | CMOS-based, charge-pump powered (single +5 V supply), no split-rail requirement; lower quiescent current (10 mA vs 14 mA) | Preferred for new designs with limited supply rails; lacks ±30 V receiver input rating and RTC configurability | Select MAX232ACPE+ when single-supply operation and lower power are critical; avoid if legacy ±12 V infrastructure or field noise immunity is required. |
| SN75189AN | Receiver-only part (no driver); identical receiver architecture, pinout, and RTC functionality; requires external driver (e.g., SN75188N) | Suitable for asymmetric interfaces where only receive path needs upgrade or isolation | Choose SN75189AN when replacing only the receiver section or when driver/receiver separation improves layout or thermal management. |
Compared with MAX232ACPE+ and SN75189AN, SN75155PE4 uniquely combines dual-line transceiver functionality, split-rail robustness, field-configurable hysteresis, and −30 V to +30 V receiver tolerance - making it irreplaceable in legacy industrial and medical RS-232 systems requiring proven noise resilience and direct compatibility with existing ±12 V power architectures.
Availability
SN75155PE4 is available at Aetrix Electronics and suitable for industrial automation, point-of-sale hardware, and medical diagnostic equipment requiring stable component supply and long-term obsolescence support.
Supply support for SN75155PE4 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 connectivity solutions with deep heritage in interface ICs and industrial-grade reliability.
The SN75155PE4 belongs to TI's legacy RS-232 interface product line, engineered specifically for robust, long-lifecycle industrial communication where EIA/TIA-232-E compliance, noise immunity, and split-rail flexibility are non-negotiable.
FAQ
What is the maximum supply voltage rating for SN75155PE4?
The SN75155PE4 supports absolute maximum supply voltages of +15 V on VCC+ and −15 V on VCC−. Operation beyond these limits may cause permanent damage. For reliable continuous operation, TI specifies recommended ranges of +4.5 V to +15 V and −4.5 V to −15 V, with typical use at ±12 V in EIA/TIA-232-E compliant systems. The SN75155PE4 must never be operated with VCC+ and VCC− referenced to the same ground potential without proper rail separation.
Does SN75155PE4 require external capacitors like the MAX232?
No, SN75155PE4 does not require external charge-pump capacitors. Unlike CMOS RS-232 transceivers such as MAX232, the SN75155PE4 uses bipolar technology and relies on dual ± supply rails (VCC+ and VCC−) to generate RS-232 voltage levels directly. It only requires standard bypass capacitors (e.g., 0.1 µF ceramic) on each supply pin to ground for noise suppression - no flying caps or voltage doublers are needed.
How does the Response Control (RTC) pin function on SN75155PE4?
The RTC pin on SN75155PE4 adjusts receiver input hysteresis and threshold voltage by connecting an external resistor to ground (or resistor + bias voltage). A 3.9-kΩ resistor sets nominal VIT+ = 1.9 V and VIT− = 0.95 V (0.6 V hysteresis); increasing resistance raises thresholds, decreasing resistance lowers them. This allows field tuning for specific noise environments - a capability absent in most modern RS-232 ICs. The SN75155PE4 datasheet provides detailed RC network design guidelines in Figure 8 and Figure 9.
Is SN75155PE4 RoHS compliant?
Yes, SN75155PE4 is RoHS compliant. Per TI's official packaging addendum, the SN75155PE4 variant carries NIPDAU (nickel/palladium/gold) lead finish and meets RoHS Directive 2011/65/EU requirements. It is rated MSL Level-1 with unlimited floor life and qualifies for standard Pb-free reflow profiles up to 260°C peak. Full compliance documentation, including test reports and substance declarations, is available through TI's Quality & Environmental page.
Can SN75155PE4 replace SN75155P in existing designs?
Yes, SN75155PE4 is a direct drop-in replacement for SN75155P. Both share identical PDIP-8 package dimensions, pinout, electrical specifications, and temperature range (0°C to 70°C). The "E4" suffix denotes TI's green packaging standard (lead-free, RoHS-compliant, NIPDAU finish), whereas SN75155P used legacy leaded finish. No PCB or schematic changes are required - only reflow profile adjustment to accommodate Pb-free soldering if transitioning from leaded assembly.
SN75155PE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Full
- Receiver Hysteresis:
- 600 mV
- Data Rate:
- -
- Voltage - Supply:
- ±4.5V ~ 15V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
SN75155PE4 FAQ
1.How can I place an order for SN75155PE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75155PE4 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 SN75155PE4 reliable?
The price and inventory of SN75155PE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75155PE4 is usually 5 days.
3.What payment methods are accepted for SN75155PE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75155PE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75155PE4?
SN75155PE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75155PE4 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 SN75155PE4?
For technical support, including SN75155PE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75155PE4 requirements.
6.How does Aetrix verify that SN75155PE4 is sourced from the original manufacturer or authorized distributors?
All SN75155PE4 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 SN75155PE4 meets industry standards.
7.What is the process for return or replacement of SN75155PE4?
All SN75155PE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN75155PE4, 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 SN75155PE4 part is unused and in its original packaging.
Return procedure for SN75155PE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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