MOTOROLA SN74LS145D, SN74LS145DR2, SN74LS145M, SN74LS145MEL, SN74LS145ML1 Datasheet

SN74LS145

1-of-10 Decoder/Driver

Open-Collector

The SN74LS145, 1-of-10 Decoder/Driver, is designed to accept BCD inputs and provide appropriate outputs to drive 10-digit incandescent displays. All outputs remain off for all invalid binary input conditions. It is designed for use as indicator/relay drivers or as an open-collector logic circuit driver. Each of the high breakdown output transistors will sink up to 80 mA of current. Typical power dissipation is 35 mW. This device is fully compatible with all TTL families.

•Low Power Version of 74145

•Input Clamp Diodes Limit High Speed Termination Effects

GUARANTEED OPERATING RANGES

Symbol	Parameter	Min	Typ	Max	Unit
VCC	Supply Voltage	4.75	5.0	5.25	V
TA	Operating Ambient	0	25	70	°C
	Temperature Range
VOH	Output Voltage ± High			15	V
IOL	Output Current ± Low			24	mA

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LOW

POWER

SCHOTTKY

16

1

PLASTIC

N SUFFIX

CASE 648

16

1

SOIC

D SUFFIX

CASE 751B

ORDERING INFORMATION

Device	Package	Shipping
SN74LS145N	16 Pin DIP	2000 Units/Box
SN74LS145D	16 Pin	2500/Tape & Reel

Semiconductor Components Industries, LLC, 1999	1	Publication Order Number:
December, 1999 ± Rev. 6		SN74LS145/D

SN74LS145

CONNECTION DIAGRAM DIP (TOP VIEW)

VCC		P0		P1		P2		P3		Q9				Q8			Q7
16		15		14		13		12		11				10			9

1				2		3			4		5			6			7			8
			0		1			2		3			4		5				6	GND
		Q		Q			Q		Q			Q		Q				Q
																	LOADING (Note a)
PIN NAMES																	HIGH					LOW
P0, P1, P2, P3					BCD Inputs												0.5 U.L.					0.25 U.L.
Q	0 ± Q9				Outputs											Open Collector						15 U.L.

NOTES:

a) 1 TTL Unit Load (U.L.) = 40 mA HIGH/1.6 mA LOW.

LOGIC SYMBOL

15 14 13 12

P0 P1 P2 P3

Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9

1

2

3

4

5

6

7

9

10

11

VCC = PIN 16

GND = PIN 8

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2

			SN74LS145
			LOGIC DIAGRAM
			INPUTS
P0			P1		P2		P3
INPUT
INVERTERS
0	0		1	1	2	2	3	3
DECODE/DRIVER
GATES
Q0	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8 Q9
				OUTPUTS

TRUTH TABLE

INPUTS

OUTPUTS

P3

P2

P1

P0

0

1

2

3

4

5

6

7

8

9

Q

Q

Q

Q

Q

Q

Q

Q

Q

Q

L

L

L

L

L

H

H

H

H

H

H

H

H

H

L

L

L

H

H

L

H

H

H

H

H

H

H

H

L

L

H

L

H

H

L

H

H

H

H

H

H

H

L

L

H

H

H

H

H

L

H

H

H

H

H

H

L

H

L

L

H

H

H

H

L

H

H

H

H

H

L

H

L

H

H

H

H

H

H

L

H

H

H

H

L

H

H

L

H

H

H

H

H

H

L

H

H

H

L

H

H

H

H

H

H

H

H

H

H

L

H

H

H

L

L

L

H

H

H

H

H

H

H

H

L

H

H

L

L

H

H

H

H

H

H

H

H

H

H

L

H

L

H

L

H

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

L

H

H

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H = HIGH Voltage Level

L = LOW Voltage Level

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