Fairchild Semiconductor DM74LS26N, DM74LS26MX, DM74LS26M, DM74LS26CW Datasheet

August 1986

Revised March 2000

DM74LS26

Quad 2-Input NAND Gate

with High Voltage Open-Collector Outputs

General Description	Pull-Up Resistor Equations
This device contains four independent gates each of which
performs the logic NAND function. The open-collector out-
puts require external pull-up resistors for proper logical
operation.
These gates feature high-voltage output ratings (up to 15V)
for interfacing with 12V systems. Although the outputs are
rated for 15V, the device supply is still rated for 5V.	Where:	N1 (IOH) = total maximum output high current
		for all outputs tied to pull-up resistor

N2 (IIH) = total maximum input high current for all inputs tied to pull-up resistor

N3 (IIL) = total maximum input low current for all inputs tied to pull-up resistor

Ordering Code:

Order Number	Package Number	Package Description
DM74LS26M	M14A	14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS26N	N14A	14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram	Function Table
				Y =	AB
		Inputs					Output
		A		B			Y
		L		L			H
		L		H			H
		H		L			H
		H		H			L
	H = HIGH Logic Level
	L = LOW Logic Level

Outputs Collector-Open Voltage High with Gate NAND Input-2 Quad DM74LS26

© 2000 Fairchild Semiconductor Corporation

DS006358

www.fairchildsemi.com

DM74LS26

Absolute Maximum Ratings(Note 1)

Supply Voltage	7V
Input Voltage	7V
Output Voltage	15V
Operating Free Air Temperature Range	0°C to +70°C
Storage Temperature Range	−65°C to +150°C

Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Recommended Operating Conditions

Symbol	Parameter	Min	Nom	Max	Units
VCC	Supply Voltage	4.75	5	5.25	V
VIH	HIGH Level Input Voltage	2			V
VIL	LOW Level Input Voltage			0.8	V
VOH	HIGH Level Output Voltage			15	V
IOL	LOW Level Output Current			8	mA
TA	Free Air Operating Temperature	0		70	°C

Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted)

Symbol	Parameter	Conditions		Min	Typ	Max	Units
					(Note 2)
VI	Input Clamp Voltage	VCC = Min, II = −18 mA				−1.5	V
ICEX	HIGH Level	VCC = Min	VO = 15V			1000	μA
	Output Current	VIL = Max	VO = 12V			50
VOL	LOW Level	VCC = Min, IOL = Max			0.35	0.5
	Output Voltage	VIH = Min					V
		IOL = 4 mA, VCC = Min			0.25	0.4
II	Input Current @ Max	VCC = Max, VI = 7V				0.1	mA
	Input Voltage	VI = 5.5V
IIH	HIGH Level Input Current	VCC = Max, VI = 2.7V				20	μA
IIL	LOW Level Input Current	VCC = Max, VI = 0.4V				−0.36	mA
ICCH	Supply Current with Outputs HIGH	VCC = Max			0.8	1.6	mA
ICCL	Supply Current with Outputs LOW	VCC = Max			2.4	4.4	mA

Note 2: All typicals are at VCC = 5V, TA = 25°C.

Switching Characteristics

at VCC = 5V and TA = 25°C

					RL = 2 kΩ
Symbol	Parameter		CL = 15 pF				CL = 50 pF		Units
		Min		Max		Min		Max
tPLH	Propagation Delay Time			20				45	ns
	LOW-to-HIGH Level Output
tPHL	Propagation Delay Time			15				20	ns
	HIGH-to-LOW Level Output

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