SMDA05 Datasheet – 5V, Unidirectional TVS Array – Semtech

What is SMDA05?

It is a type of 5V, transient voltage suppressor (TVS) diode. TVS diodes are electronic components used to protect sensitive electronic circuits from voltage spikes and transients that could damage the circuit or cause malfunction.

Function: Unidirectional TVS Array for Protection of Four Lines

Package: SO-8 Pin type

Manufacturer: ( Semtech Corporation )


SMDA05 Datasheet


The SMDA05 series of TVS arrays are designed to provide undirectional protection for sensitive electronics from damage or latch-up due to ESD, lightning, and other voltage-induced transient events.

TVS diodes are solid-state devices designed specifically for transient suppression. They offer desirable characteristics for board level protection including fast response time, low operating and clamping voltage and no device degradation.


1. Working voltage : 5 V
2. Transient protection for data lines to
(1) IEC 61000-4-2 (ESD) ± 15 kV (air), ± 8 kV (contact)
(2) IEC 61000-4-4 (EFT) 40 A (5/50 ns)
(3) IEC 61000-4-5 (Lightning) 12 A (8/20 µs)
4. Unidirectional protection
5. Small SO-8 package
6. Protects four I/O lines
7. Low leakage current
8. Low operating and clamping voltages
9. Solid-state silicon-avalanche technology



1. RS-232 data lines
2. Microprocessor-based equipment
3. Notebooks, desktops, and servers
4. Instrumentation
5. LAN/WAN equipment
6. Peripherals
7. Serial and parallel ports

Official Site :

The SMDA05 diode has a low clamping voltage and fast response time, making it suitable for use in high-speed digital circuits and communication interfaces such as Ethernet, USB, and HDMI. It is also commonly used in power supply circuits and automotive electronics.

SMDA05 Datasheet PDF


Other data sheets are available within the file: SMDA12, SMDA15, SMDA24

ULN2003 Datasheet PDF – Seven Darlington Array – ST

Part Number: ULN2003

Function : Seven Darlington Array

Package: DIP 16, SO 16, TSSOP 16 Pin Type

Manufacturer: STMicroelectronics


ULN2003 ULN2003A Image


What is ULN2003?

The ULN2001, ULN2002, ULN2003 and ULN2004 are high voltage, high current Darlington
arrays each containing seven open collector Darlington pairs with common emitters. Each
channel rated at 500 mA and can withstand peak currents of 600 mA. Suppression diodes are
included for inductive load driving and the inputs are pinned opposite the outputs to simplify board

These versatile devices are useful for driving a wide range of loads including solenoids, relay DC
motors, LED display filament lamps, thermal printheads and high-power buffers.

The ULN2003 is a popular high-voltage and high-current Darlington transistor array. It consists of seven NPN Darlington pairs that are capable of driving loads up to 50V and 500mA per channel.


ULN2003 Datasheet Pinout


• Seven Darlingtons per package

• Output current 500 mA per driver (600 mA peak)

• Output voltage 50 V

• Integrated suppression diodes for inductive loads

• Outputs can be paralleled for higher current

• TTL/CMOS/PMOS/DTL compatible inputs
• Inputs pinned opposite outputs to simplify layout

ULN2003 vs ULN2803?

The ULN2803 has a higher current rating per channel and can drive one additional channel compared to the ULN2003.

1. Number of channels:

The ULN2003 has seven NPN Darlington pairs, while the ULN2803 has eight NPN Darlington pairs.

2. Current rating:

The ULN2803 has a higher current rating per channel than the ULN2003. Each channel of the ULN2803 can handle up to 500 mA, while each channel of the ULN2003 can handle up to 350 mA.

3. Voltage rating:

The ULN2003 can handle a higher voltage per channel than the ULN2803.

ULN2003 Datasheet PDF



ULN2803 Datasheet PDF


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