Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Decoder Priority encoder Single supply SOIC 16 N

 

    

SCLS109G − MARCH 1984 − REVISED APRIL 2004

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Wide Operating Voltage Range of 2 V to 6 V

D Outputs Can Drive Up To 10 LSTTL Loads

D Low Power Consumption, 80-µA Max I

D Typical t

= 16 ns

D ±4-mA Output Drive at 5 V

D Low Input Current of 1 µA Max

D Encode Eight Data Lines to 3-Line Binary

(Octal)

D Applications Include:

− n-Bit Encoding

− Code Converters and Generators

description/ordering information

The ’HC148 devices feature priority decoding of

the inputs to ensure that only the highest-order

data line is encoded. These devices encode eight

data lines to 3-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.

Data inputs and outputs are active at the low logic

level.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − N Tube of 25 SN74HC148N SN74HC148N

Tube of 40 SN74HC148D

−40°C to 85°C

SOIC − D

Reel of 2500 SN74HC148DR

HC148

−40°C to 85°C

SOIC − D

Reel of 250 SN74HC148DT

HC148

SOIC − DW Reel of 2000 SN74HC148DWR HC148

SOP − NS Reel of 2000 SN74HC148NSR HC148

CDIP − J Tube of 25 SNJ54HC148J SNJ54HC148J

−55°C to 125°C

CFP − W Tube of 150 SNJ54HC148W SNJ54HC148W

−55 C to 125 C

LCCC − FK Tube of 55 SNJ54HC148FK SNJ54HC148FK

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications o

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

3212019

910111213

GND

SN54HC148 . . . FK PACKAGE

(TOP VIEW)

NC − No internal connection

GND

SN54HC148 ...J OR W PACKAGE

SN74HC148 . . . D, DW, N, OR NS PACKAGE

(TOP VIEW)

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Summary of content (21 pages)

PAGE 1
SCLS109G − MARCH 1984 − REVISED APRIL 2004 D Wide Operating Voltage Range of 2 V to 6 V Outputs Can Drive Up To 10 LSTTL Loads Low Power Consumption, 80-µA Max ICC Typical tpd = 16 ns ±4-mA Output Drive at 5 V Low Input Current of 1 µA Max Encode Eight Data Lines to 3-Line Binary (Octal) Applications Include: − n-Bit Encoding − Code Converters and Generators SN54HC148 . . . J OR W PACKAGE SN74HC148 . . .
PAGE 2
SCLS109G − MARCH 1984 − REVISED APRIL 2004 FUNCTION TABLE OUTPUTS INPUTS EI 2 0 1 2 3 4 5 6 7 A2 A1 A0 GS EO H X X X X X X X X H H H H H L H H H H H H H H H H H H L L X X X X X X X L L L L L H L X X X X X X L H L L H L H L X X X X X L H H L H L L H L X X X X L H H H L H H L H L X X X L H H H H H L L L H L X X L H H H H H H L H L H
PAGE 3
SCLS109G − MARCH 1984 − REVISED APRIL 2004 logic diagram (positive logic) 0 10 15 14 1 2 11 4 6 7 EI A0 13 1 7 5 GS 12 9 3 EO A1 2 3 4 6 A2 5 Pin numbers shown are for the D, DW, J, N, NS, and W packages.
PAGE 4
SCLS109G − MARCH 1984 − REVISED APRIL 2004 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 5
SCLS109G − MARCH 1984 − REVISED APRIL 2004 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = −20 µA VOH VI = VIH or VIL IOH = −4 mA IOH = −5.2 mA IOL = 20 µA VOL VI = VIH or VIL IOL = 4 mA IOL = 5.2 mA II ICC VI = VCC or 0 VI = VCC or 0, IO = 0 VCC MIN TA = 25°C TYP MAX MIN MAX SN74HC148 MIN 2V 1.9 1.998 1.9 1.9 4.5 V 4.4 4.499 4.4 4.4 6V 5.
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SCLS109G − MARCH 1984 − REVISED APRIL 2004 operating characteristics, TA = 25°C PARAMETER Cpd TEST CONDITIONS Power dissipation capacitance No load TYP UNIT 35 pF PARAMETER MEASUREMENT INFORMATION From Output Under Test Test Point Input VCC 50% 50% 0V CL = 50 pF (see Note A) tPLH In-Phase Output LOAD CIRCUIT 50% 10% tPHL 90% 90% tr Input 50% 10% 90% 90% tr tPHL VCC 50% 10% 0 V Out-of-Phase Output 90% tf VOH 50% 10% VOL tf tPLH
PAGE 7
SCLS109G − MARCH 1984 − REVISED APRIL 2004 APPLICATION INFORMATION 16-Line Data (active low) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 EI 0 1 2 3 4 5 6 7 EI ’HC148 ’HC148 EO A0 A1 A2 GS EO A0 A1 A2 Enable (active low) GS ’HC08 0 1 2 Priority Flag (active low) 3 Encoded Data (active low) 16-Line Data (active low) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 EI 0 1 2 3 4 5 6 7 EI ’HC148 ’HC148 EO A0 A1 A2 GS
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.
PAGE 9
PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 18-Oct-2013 Status (1) SNJ54HC148W ACTIVE Package Type Package Pins Package Drawing Qty CFP W 16 1 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) TBD A42 N / A for Pkg Type Op Temp (°C) Device Marking (4/5) -55 to 125 SNJ54HC148W (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 5-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74HC148DR SOIC D 16 2500 330.0 16.8 6.5 10.3 2.1 8.0 16.0 Q1 SN74HC148DRG4 SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 5-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74HC148DR SOIC D 16 2500 364.0 364.0 27.0 SN74HC148DRG4 SOIC D 16 2500 333.2 345.9 28.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.