DM74ALS258N

DM74ALS258N Datasheet

DM74ALS257<br>• DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer

Part	Datasheet
DM74ALS258N	DM74ALS258N (pdf)

Related Parts	Information
DM74ALS257M	DM74ALS257M
DM74ALS257N	DM74ALS257N
DM74ALS257MX	DM74ALS257MX
DM74ALS258M	DM74ALS258M
DM74ALS258MX	DM74ALS258MX
DM74ALS257SJ	DM74ALS257SJ
DM74ALS257SJX	DM74ALS257SJX

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DM74ALS257 • DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer DM74ALS257 • DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four 3STATE outputs that can interface directly with data lines of bus-organized systems. A 4-bit word selected from one of two sources is routed to the four outputs. The DM74ALS257 presents true data whereas the DM74ALS258 presents inverted data to minimize propagation delay time. This 3-STATE output feature means that n-bit paralleled data selectors with up to 258 sources can be implemented for data buses. It also permits the use of standard TTL registers for data retention throughout the system. s Switching specifications at 50 pF s Switching specifications guaranteed over full tempera- ture and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin for pin compatible with Schottky and low power Schottky TTL counterpart s Improved AC performance over Schottky and low power Schottky counterparts s 3-STATE buffer-type outputs drive bus lines directly s Expand any data input point s Multiplex dual data buses s General four functions of two variables one variable is common s Source programmable counters Ordering Code: Order Number Package Number Package Description DM74ALS257M M16A 16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow DM74ALS257SJ M16D 16-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide DM74ALS257N N16E 16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide DM74ALS258M M16A 16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow DM74ALS258N N16E 16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Inputs Output Select A Control H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance OFF Output Y B DM74ALS257 DM74ALS258 2000 Fairchild Semiconductor Corporation DS006227 DM74ALS257 • DM74ALS258 Logic Diagrams DM74ALS257 DM74ALS258 DM74ALS257 • DM74ALS258 Absolute Maximum Ratings Note 1 Supply Voltage Input Voltage Applied to Disabled Output Operating Free Air Temperature Range Storage Temperature Range Typical N Package M Package 7V 5.5V 0°C to +70°C −65°C to +150°C 73.0°C/W 102.0°C/W 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 VCC VIH VIL IOH IOL TA Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. Parameter Conditions VIK VOH IIH IIL IO IOZH IOZL ICCH ICCL ICCZ Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage VCC = 4.5V, II = −18 mA VCC = 4.5V IOH = mA VCC = 4.5V Input Current at Maximum Input Voltage VCC = 5.5V, VIH = 7V HIGH Level Input Current VCC = 5.5V, VIH = 2.7V LOW Level Input Current

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DM74ALS257
• DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer

DM74ALS257
• DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer

These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four 3STATE outputs that can interface directly with data lines of bus-organized systems. A 4-bit word selected from one of two sources is routed to the four outputs. The DM74ALS257 presents true data whereas the DM74ALS258 presents inverted data to minimize propagation delay time.

This 3-STATE output feature means that n-bit paralleled data selectors with up to 258 sources can be implemented for data buses. It also permits the use of standard TTL registers for data retention throughout the system.
s Switching specifications at 50 pF s Switching specifications guaranteed over full tempera-
ture and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL
process s Functionally and pin for pin compatible with Schottky
and low power Schottky TTL counterpart s Improved AC performance over Schottky and low power

Schottky counterparts s 3-STATE buffer-type outputs drive bus lines directly s Expand any data input point s Multiplex dual data buses s General four functions of two variables one variable is
common s Source programmable counters
Ordering Code:

Order Number Package Number

Package Description

DM74ALS257M

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow

DM74ALS257SJ

M16D
16-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide

DM74ALS257N

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide

DM74ALS258M

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow

DM74ALS258N

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Function Table

Inputs

Output Select A

Control

H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance OFF

Output Y

B DM74ALS257 DM74ALS258
2000 Fairchild Semiconductor Corporation DS006227

DM74ALS257
• DM74ALS258

Logic Diagrams

DM74ALS257

DM74ALS258

DM74ALS257
• DM74ALS258

Absolute Maximum Ratings Note 1

Supply Voltage Input Voltage Applied to Disabled Output Operating Free Air Temperature Range Storage Temperature Range Typical

N Package M Package
7V 5.5V 0°C to +70°C −65°C to +150°C
73.0°C/W 102.0°C/W

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

VCC VIH VIL IOH IOL TA

Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature

Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.

Parameter

Conditions

VIK VOH

IIH IIL IO IOZH

IOZL

ICCH

ICCL

ICCZ

Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage

VCC = 4.5V, II = −18 mA VCC = 4.5V IOH = mA VCC = 4.5V

Input Current at Maximum Input Voltage

VCC = 5.5V, VIH = 7V

HIGH Level Input Current

VCC = 5.5V, VIH = 2.7V

LOW Level Input Current

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Datasheet ID: DM74ALS258N 513672