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Part: 85124012A
Category:
Logic
-> Encoders/Multiplexers
-> Multiplexers
Description: ti SN54HC257, Quad 2-Line to 1-Line Data Selectors/multiplexers With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download 85124012A datasheet File size : 209 kB
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Datasheet text preview:
SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
SCLS224B - DECEMBER 1982 - REVISED SEPTEMBER 2003
D Wide Operating Voltage Range of 2 V to 6 V D High-Current Inverting Outputs Drive Up To
15 LSTTL Loads
D Low Power Consumption, 80-µA Max ICC D 'HC257 . . . Typical tpd = 9 ns
SN54HC257, SN54HC258 . . . J PACKAGE SN74HC257, SN74HC258 . . . D, N, NS, OR PW PACKAGE (TOP VIEW)
D D D D
'HC258 . . . Typical tpd = 12 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max Provides Bus Interface from Multiple Sources in High-Performance Systems
SN54HC257, SN54HC258 . . . FK PACKAGE (TOP VIEW)
A/B 1A 1B 1Y 2A 2B 2Y GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC G 4A 4B 4Y 3A 3B 3Y
1A A/B NC VCC G 1B 1Y NC 2A 2B
3 4 5 6 7 8 2 1 20 19 18 17 16 15 14 9 10 11 12 13
4A 4B NC 4Y 3A
NC - No internal connection
description/ordering information
ORDERING INFORMATION
TA PDIP - N PACKAGE Tube of 25 Tube of 40 Reel of 2500 SOIC - D Reel of 250 Tube of 40 Reel of 2500 -40°C to 85 C 85°C SOP - NS Reel of 2000 Tube of 90 Reel of 2000 Reel of 250 TSSOP - PW Tube of 90 Reel of 2000 Reel of 250 CDIP - J -55°C to 125°C LCCC - FK Tube of 55 Tube of 25 ORDERABLE PART NUMBER SN74HC257N SN74HC258N SN74HC257D SN74HC257DR SN74HC257DT SN74HC258D SN74HC258DR SN74HC257NSR SN74HC258NSR SN74HC257PW SN74HC257PWR SN74HC257PWT SN74HC258PW SN74HC258PWR SN74HC258PWT SNJ54HC257J SNJ54HC258J SNJ54HC257FK SNJ54HC258FK SNJ54HC257J SNJ54HC258J SNJ54HC257FK SNJ54HC258FK HC258 HC257 HC258 HC257 HC258 HC257 TOP-SIDE MARKING SN74HC257N SN74HC258N
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 of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
On products compliant to MIL PRF 38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
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2Y GND NC 3Y 3B
1
SCLS224B - DECEMBER 1982 - REVISED SEPTEMBER 2003
SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
description/ordering information (continued)
These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (G) input is at a high logic level. To ensure the high-impedance state during power up or power down, G should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
FUNCTION TABLE INPUTS G H L L L L A/B X L L H H A X L H X X B X X X L H OUTPUT Y 'HC257 Z L H L H 'HC258 Z H L H L
'HC257 logic diagram (positive logic)
G 15
A/B
1
1A
2 4 3 1Y
1B
2A
5 7 6 2Y
2B
3A
11 9 10 3Y
3B
4A
14 12 13 4Y
4B
Pin numbers shown are for the D, J, N, NS, and PW packages.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
SCLS224B - DECEMBER 1982 - REVISED SEPTEMBER 2003
'HC258 logic diagram (positive logic)
G 15
A/B
1
1A
2 4 3 1Y
1B
2A
5 7 6 2Y
2B
3A
11 9 10 3Y
3B
4A
14 12 13 4Y
4B
Pin numbers shown are for the D, J, N, NS, and PW packages.
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 VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA Package thermal impedance, JA (see Note 1): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
SCLS224B - DECEMBER 1982 - REVISED SEPTEMBER 2003
SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
recommended operating conditions (see Note 2)
SN54HC257, SN54HC258 MIN VCC VIH Supply voltage VCC = 2 V VCC = 4.5 V VCC = 6 V VCC = 2 V VIL VI VO t/v Low-level input voltage Input voltage Output voltage VCC = 2 V VCC = 4.5 V VCC = 4.5 V VCC = 6 V 0 0 2 1.5 3.15 4.2 0.3 0.9 1.2 VCC VCC 1000 500 0 0 NOM 5 MAX 6 SN74HC257, SN74HC258 MIN 2 1.5 3.15 4.2 0.5 1.35 1.8 VCC VCC 1000 500 ns V V V V NOM 5 MAX 6 V UNIT
High-level input voltage
Input transition rise/fall time
VCC = 6 V 400 400 TA Operating free-air temperature -55 125 -40 85 °C NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC MIN 2V IOH = -20 µA VOH VI = VIH or VIL IOH = -6 mA IOH = -7.8 mA IOL = 20 µA VOL VI = VIH or VIL IOL = 6 mA IOL = 7.8 mA II IOZ ICC Ci VI = VCC or 0 VO = VCC or 0 VI = VCC or 0, IO = 0 4.5 V 6V 4.5 V 6V 2V 4.5 V 6V 4.5 V 6V 6V 6V 6V 2 V to 6 V 3 1.9 4.4 5.9 3.98 5.48 TA = 25°C TYP 1.998 4.499 5.999 4.3 5.8 0.002 0.001 0.001 0.17 0.15 ±0.1 ±0.01 0.1 0.1 0.1 0.26 0.26 ±100 ±0.5 8 10 MAX SN54HC257, SN54HC258 MIN 1.9 4.4 5.9 3.7 5.2 0.1 0.1 0.1 0.4 0.4 ±1000 ±10 160 10 MAX SN74HC257, SN74HC258 MIN 1.9 4.4 5.9 3.84 5.34 0.1 0.1 0.1 0.33 0.33 ±1000 ±5 80 10 nA µA µA pF V V MAX UNIT
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
SCLS224B - DECEMBER 1982 - REVISED SEPTEMBER 2003
switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1)
PARAMETER FROM (INPUT) TO (OUTPUT) VCC 2V A or B tpd A/B Any Y Any Y 4.5 V 6V 2V 4.5 V 6V 2V ten G Any Y 4.5 V 6V 2V tdis G Any Y 4.5 V 6V 2V tt Any Y 4.5 V 6V MIN TA = 25°C TYP MAX 50 10 9 50 10 9 75 15 13 75 15 13 28 8 6 100 20 17 100 20 17 150 30 26 150 30 26 60 12 10 SN54HC257 MIN MAX 150 30 25 150 30 25 225 45 38 225 45 38 90 18 15 SN74HC257 MIN MAX 125 25 21 125 25 21 190 38 32 190 38 32 75 15 13 ns ns ns ns UNIT
switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 1)
PARAMETER FROM (INPUT) TO (OUTPUT) VCC 2V A or B tpd A/B Any Y Any Y 4.5 V 6V 2V 4.5 V 6V 2V ten G Any Y 4.5 V 6V 2V tt Any Y 4.5 V 6V TA = 25°C MIN TYP MAX 75 15 13 75 15 13 100 24 18 45 17 13 150 30 26 150 30 26 200 40 34 210 42 36 SN54HC257 MIN MAX 245 45 38 245 45 38 300 60 51 315 63 53 SN74HC257 MIN MAX 190 38 32 190 38 32 250 50 43 265 53 45 ns ns ns UNIT
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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