Specification	SN74LS19AN

Current - Output High, Low [custom]	400 µA
Current - Output High, Low [custom]	8 mA
Features	Schmitt Trigger
Input Logic Level - High	2.15 V
Input Logic Level - Low	0.75 V
Logic Type	Inverter
Max Propagation Delay @ V, Max CL	30 ns
Mounting Type	Through Hole
Number of Circuits	6
Number of Inputs	1
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	14-DIP
Package / Case [x]	0.3 "
Package / Case [y]	7.62 mm
Voltage - Supply [Max]	5.25 V
Voltage - Supply [Min]	4.75 V

SN74LS19A Series

6-ch, 4.75-V to 5.25-V bipolar inverters with Schmitt-Trigger inputs

Part	Mounting Type	Input Logic Level - Low	Input Logic Level - High	Features	Max Propagation Delay @ V, Max CL	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Number of Inputs	Logic Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Number of Circuits	Operating Temperature [Max]	Package / Case [x]	Package / Case [y]	Package / Case
Texas Instruments SN74LS19ADR	Surface Mount	0.75 V	2.15 V	Schmitt Trigger	30 ns	400 µA	8 mA	1	Inverter	4.75 V	5.25 V	6	70 °C	0.154 in	3.9 mm	14-SOIC
Texas Instruments SN74LS19AD	Surface Mount	0.75 V	2.15 V	Schmitt Trigger	30 ns	400 µA	8 mA	1	Inverter	4.75 V	5.25 V	6	70 °C	0.154 in	3.9 mm	14-SOIC
Texas Instruments SN74LS19AN	Through Hole	0.75 V	2.15 V	Schmitt Trigger	30 ns	400 µA	8 mA	1	Inverter	4.75 V	5.25 V	6	70 °C	0.3 "	7.62 mm	14-DIP

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 1.63
		10	$ 1.46
		25	$ 1.38
		100	$ 1.18
		250	$ 1.10
		500	$ 0.97
Texas Instruments	TUBE	1	$ 2.00
		100	$ 1.65
		250	$ 1.19
		1000	$ 0.89

Description

General part information

SN74LS19A Series

Each circuit functions as a NAND gate or inverter, but because of the Schmitt action, it has different input threshold levels for positive-going (VT+) and for negative-going (VT-) signals. The hysteresis or backlash, which is the difference between the two threshold levels (VT+- VT-), is typically 800 millivolts.

These circuits are temperature-compensated and can be triggered from the slowest of input ramps and still give clean, jitter-free output signals.

Documents

Technical documentation and resources

Schmitt-Trigger Positive-NAND Gates And Inverters With Totem-Pole Outputs datasheet

Data sheet