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SN74LS145NSR, SN74LS147N, SN74LS148

Table of contents:
Info of SN74LS145NSR
Info of SN74LS147N
Info of SN74LS148

SN74LS145NSR, SN74LS147N, SN74LS148 Selling Leads, Datasheet

MFG:Texas Instruments Category:Integrated Circuits (ICs) Package Cooled:SOP-16 D/C:0748+

SN74LS145NSR, SN74LS147N, SN74LS148 Datasheet download

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Part Number: SN74LS145NSR

Category: Integrated Circuits (ICs)

MFG: Texas Instruments

Package Cooled: SOP-16

D/C: 0748+

Description: IC DECODER/DRVR BCD-DEC 16-SOP

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SN74LS145NSR Parameters

Technical/Catalog Information	SN74LS145NSR
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
Circuit	1 x 4:10
Independent Circuits	1
Mounting Type	Surface Mount
Current - Output High, Low	40A, 1.6mA
Package / Case	16-SOP
Packaging	Tape & Reel (TR)
Type	Decoder
Voltage Supply Source	Single Supply
Operating Temperature	0°C ~ 70°C
Voltage - Supply	4.75 V ~ 5.25 V
Drawing Number	296; 4040062; NS; 14, 16, 20, 24
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	SN74LS145NSR SN74LS145NSR

SN74LS147N General Description

The SN74LS147 and the SN74LS148 are Priority Encoders. They provide priority decoding of the inputs to ensure that only the highest order data line is encoded. Both devices have data inputs and outputs which are active at the low logic level.

The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition does not require an input condition because zero is encoded when all nine data lines are at a high logic level.

The LS148 encodes eight data lines to three-line (4-2-1) binary (octal). By providing cascading circuitry (Enable Input EI and Enable Output EO) octal expansion is allowed without needing external circuitry.

SN74LS147N Connection Diagram

SN74LS148 General Description

These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 devices encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition, as zero is encoded when all nine data lines are at a high logic level.

The '148 and 'LS148 devices encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54/74LS load, respectively.

SN74LS148 Maximum Ratings

Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 V
Input voltage, V_I: '147, '148 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..5.5 V
                           'LS147, 'LS148 . . . . . . . . . . . . . . . . . . . . . . . . . . . .   . . . . .7 V
Inter-emitter voltage: '148 only (see Note 2) . . . . . . . . . . . . . . . . . . . . . .5.5 V
Package thermal impedance _JA (see Note 3): D package . . . . . . . . . .73°C/W
                                                                         N package . . . . . . . . . ..67°C/W
                                                                         NS package . . . . . . .     64°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . .−65°C to 150°C

SN74LS148 Typical Application

Audio
Automotive
Broadband
Digital Control
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless

SN74LS148 Connection Diagram

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