DM74ALS645AWM

DM74ALS645AWM Datasheet

DM74ALS645A Octal Bus Transceivers

Part	Datasheet
DM74ALS645AWM	DM74ALS645AWM (pdf)

Related Parts	Information
DM74ALS645AWMX	DM74ALS645AWMX
DM74ALS645AN	DM74ALS645AN

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DM74ALS645A Octal Bus Transceivers DM74ALS645A Octal Bus Transceivers These octal bus transceivers are designed for asynchronous two-way communication between data busses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control DIR input. The enable input G can be used to disable the device so the busses are effectively isolated. s Advanced Oxide-isolated Ion-implanted Schottky TTL process s Switching performance is guaranteed over full temperature and VCC supply range s Switching performance specified at 50 pF s PNP input design reduces input loading Ordering Code: Order Number Package Number Package Description DM74ALS645AWM M20B 20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide DM74ALS645AN 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 Control Inputs L = LOW Logic Level H = HIGH Logic Level X = Either LOW or HIGH Logic Level Operation B Data to A Bus A Data to B Bus Isolation 2000 Fairchild Semiconductor Corporation DS009304 DM74ALS645A Absolute Maximum Ratings Note 1 Supply Voltage Input Voltage; Control Inputs I/O Ports 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 53.0°C/W 72.0°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 Operating Free Air Temperature Range Electrical Characteristics Over Recommended Free Air Temperature Range Parameter Test Conditions Input Clamp Voltage VCC = Min, II = −18 mA HIGH Level Output Voltage VCC = to 5.5V IOH = mA VCC = Max IOH = − 3 mA IOH = Max LOW Level Output Voltage VCC = Min IOL = 12 mA IOL = 24 mA Input Current at VCC = Max I/O Ports, VI = 5.5V Maximum Input Voltage Control Inputs, VI = 7V

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DM74ALS645A Octal Bus Transceivers

DM74ALS645A Octal Bus Transceivers

These octal bus transceivers are designed for asynchronous two-way communication between data busses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control DIR input. The enable input G can be used to disable the device so the busses are effectively isolated.
s Advanced Oxide-isolated Ion-implanted Schottky TTL process
s Switching performance is guaranteed over full temperature and VCC supply range
s Switching performance specified at 50 pF s PNP input design reduces input loading
Ordering Code:

Order Number Package Number

Package Description

DM74ALS645AWM

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

DM74ALS645AN

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

Control Inputs

L = LOW Logic Level H = HIGH Logic Level X = Either LOW or HIGH Logic Level

Operation

B Data to A Bus A Data to B Bus

Isolation
2000 Fairchild Semiconductor Corporation DS009304

DM74ALS645A

Absolute Maximum Ratings Note 1

Supply Voltage Input Voltage;

Control Inputs I/O Ports 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
53.0°C/W 72.0°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 Operating Free Air Temperature Range

Electrical Characteristics

Over Recommended Free Air Temperature Range

Parameter

Test Conditions

Input Clamp Voltage

VCC = Min, II = −18 mA

HIGH Level Output Voltage

VCC = to 5.5V

IOH = mA

VCC = Max

IOH = − 3 mA

IOH = Max

LOW Level Output Voltage

VCC = Min

IOL = 12 mA

IOL = 24 mA

Input Current at

VCC = Max

I/O Ports, VI = 5.5V

Maximum Input Voltage

Control Inputs, VI = 7V

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Datasheet ID: DM74ALS645AWM 513699