DM74ALS244AMSAX

DM74ALS244AMSAX Datasheet

DM74ALS244A Octal 3-STATE Bus Driver

Part	Datasheet
DM74ALS244AMSAX	DM74ALS244AMSAX (pdf)

Related Parts	Information
DM74ALS244AWMX	DM74ALS244AWMX
DM74ALS244AWM	DM74ALS244AWM
DM74ALS244AN	DM74ALS244AN
DM74ALS244ASJ	DM74ALS244ASJ
DM74ALS244ASJX	DM74ALS244ASJX
DM74ALS244AMSA	DM74ALS244AMSA

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DM74ALS244A Octal 3-STATE Bus Driver DM74ALS244A Octal 3-STATE Bus Driver This octal 3-STATE bus driver is designed to provide the designer with flexibility in implementing a bus interface with memory, microprocessor, or communication systems. This device offers 64-extended temperature Grade product guaranteeing performance from −40°C to +85°C. The output 3-STATE gating control is organized into two separate groups of four buffers, and both control inputs enable the respective outputs when set logic LOW. The 3-STATE circuitry contains a feature that maintains the buffer outputs in 3-STATE high impedance state during power supply ramp-up or ramp-down. This eliminates bus glitching problems that arise during power-up and power-down. s Advanced low power oxide-isolated ion-implanted Schottky TTL process s Functional and pin compatible with the 74LS counterpart s Improved switching performance with less power dissi- pation compared with the 74LS counterpart s Switching response specified into and 50 pF load s Switching response specifications guaranteed over full temperature and VCC supply range s PNP input design reduces input loading Ordering Code: Order Number Package Number Package Description DM74ALS244AWM M20B 20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide DM74ALS244ASJ M20D 20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide DM74ALS244AMSA MSA20 20-Lead Shrink Small Outline Package SSOP , EIAJ TYPE II, 5.3mm Wide DM74ALS244AN N20A 20-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 Logic Diagram Function Table Input Output H = HIGH Level Logic State L = LOW Level Logic State X = Don't Care Either LOW or HIGH Level Logic State Z = High Impedance OFF State 2000 Fairchild Semiconductor Corporation DS006212 DM74ALS244A Absolute Maximum Ratings Note 1 Supply Voltage, VCC 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 60.5°C/W 79.8°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 Operating Free-Air Temperature Electrical Characteristics over recommended operating free air temperature unless otherwise specified Parameter Conditions VIK VOH II IIH IIL IO IOZH IOZL ICC Input Clamp Voltage HIGH Level Output Voltage VCC = 4.5V, II = −18 mA VCC = 4.5V to 5.5V VCC = 4.5V LOW Level Output Voltage Input Current at Maximum Input Voltage HIGH Level Input Current LOW Level Input Current Output Drive Current HIGH Level 3-STATE Output Current LOW Level 3-STATE Output Current Supply Current VCC = 4.5V IOL = 24 mA VCC = 5.5V, VI = 7V VCC = 5.5V, VI = 2.7V VCC = 5.5V, VIL = 0.4V VCC = 5.5V, VO = 2.25V VCC = 5.5V, VO = 2.7V VCC = 5.5V, VO = 0.4V VCC = 5.5V Outputs HIGH Outputs LOW Outputs 3-STATE IOH = mA IOH = −3 mA IOH = Max Min VCC−2 −30 Max −15 24 70 9 15 17 Units V mA °C 20 −112 20 −20 15 24 27 Units V mA µA mA µA µA Switching Characteristics over recommended operating free-air temperature range

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DM74ALS244A Octal 3-STATE Bus Driver

DM74ALS244A Octal 3-STATE Bus Driver

This octal 3-STATE bus driver is designed to provide the designer with flexibility in implementing a bus interface with memory, microprocessor, or communication systems. This device offers 64-extended temperature Grade product guaranteeing performance from −40°C to +85°C. The output 3-STATE gating control is organized into two separate groups of four buffers, and both control inputs enable the respective outputs when set logic LOW. The 3-STATE circuitry contains a feature that maintains the buffer outputs in 3-STATE high impedance state during power supply ramp-up or ramp-down. This eliminates bus glitching problems that arise during power-up and power-down.
s Advanced low power oxide-isolated ion-implanted Schottky TTL process
s Functional and pin compatible with the 74LS counterpart s Improved switching performance with less power dissi-
pation compared with the 74LS counterpart s Switching response specified into and 50 pF load s Switching response specifications guaranteed over full
temperature and VCC supply range s PNP input design reduces input loading
Ordering Code:

Order Number Package Number

Package Description

DM74ALS244AWM

M20B
20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide

DM74ALS244ASJ

M20D
20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide

DM74ALS244AMSA

MSA20
20-Lead Shrink Small Outline Package SSOP , EIAJ TYPE II, 5.3mm Wide

DM74ALS244AN

N20A
20-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

Logic Diagram

Function Table

Input

Output

H = HIGH Level Logic State L = LOW Level Logic State X = Don't Care Either LOW or HIGH Level Logic State Z = High Impedance OFF State
2000 Fairchild Semiconductor Corporation DS006212

DM74ALS244A

Absolute Maximum Ratings Note 1

Supply Voltage, VCC 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
60.5°C/W 79.8°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 Operating Free-Air Temperature

Electrical Characteristics
over recommended operating free air temperature unless otherwise specified

Parameter

Conditions

VIK VOH

II IIH IIL IO IOZH IOZL ICC

Input Clamp Voltage HIGH Level Output Voltage

VCC = 4.5V, II = −18 mA VCC = 4.5V to 5.5V VCC = 4.5V

LOW Level Output Voltage Input Current at Maximum Input Voltage HIGH Level Input Current LOW Level Input Current Output Drive Current HIGH Level 3-STATE Output Current LOW Level 3-STATE Output Current Supply Current

VCC = 4.5V IOL = 24 mA VCC = 5.5V, VI = 7V VCC = 5.5V, VI = 2.7V VCC = 5.5V, VIL = 0.4V VCC = 5.5V, VO = 2.25V VCC = 5.5V, VO = 2.7V VCC = 5.5V, VO = 0.4V VCC = 5.5V Outputs HIGH

Outputs LOW

Outputs 3-STATE

IOH = mA IOH = −3 mA IOH = Max

Min VCC−2
−30

Max −15 24 70
9 15 17

Units V mA °C
20 −112 20 −20 15 24 27

Units V
mA µA mA µA µA

Switching Characteristics
over recommended operating free-air temperature range

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Datasheet ID: DM74ALS244AMSAX 513668