DM74AS245WMX

DM74AS245WMX Datasheet

DM74AS245 Octal Bus Transceiver with 3-STATE Outputs

Part	Datasheet
DM74AS245WMX	DM74AS245WMX (pdf)

Related Parts	Information
DM74AS245SJX	DM74AS245SJX
DM74AS245N	DM74AS245N
DM74AS245WM	DM74AS245WM

PDF Datasheet Preview
DM74AS245 Octal Bus Transceiver with 3-STATE Outputs DM74AS245 Octal Bus Transceiver with 3-STATE Outputs This advanced Schottky device contains 8 pairs of 3-STATE logic elements configured as octal bus transceivers. These circuits are designed for use in memory, microprocessor systems and in asynchronous bidirectional data buses. Two way communication between buses is controlled by the DIR input. Data transmits either from the A bus to the B bus or from the B bus to the A bus. Both the driver and receiver outputs can be disabled via the G enable input which causes outputs to enter the high impedance mode so that the buses are effectively isolated. s Advanced oxide-isolated, ion-implanted Schottky TTL process s Non-inverting logic output s 3-STATE outputs independently controlled on A and B buses s Low output impedance to drive terminated transmission lines to s Switching response specified into pF s Specified to interface with CMOS at VOH = VCC − 2V s PNP inputs reduce input loading s Switching specifications guaranteed over full temperature and VCC range Ordering Code: Order Number Package Number Package Description DM74AS245WM M20B 20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide DM74AS245SJ M20D 20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide DM74AS245N 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 Function Table Control Inputs Operation B Data to A Bus A Data to B Bus Hi-Z 2000 Fairchild Semiconductor Corporation DS006299 DM74AS245 Absolute Maximum Ratings Note 1 Supply Voltage, VCC 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 51.5°C/W 76.0°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 Parameter Conditions Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage Input Current at Max Input Voltage HIGH Level Input Current LOW Level Input Current Output Drive Current Supply Current VCC = 4.5V, IIN = −18 mA VCC = 4.5V, IOH = −3 mA VCC = 4.5V, IOH = −15 mA IOH = −2 mA, VCC = 4.5V to 5.5V VCC = 4.5V, IOL = Max VCC = 5.5V, VIN = 7V, VIN = 5.5V for A or B Ports VCC = 5.5V, VIN = 2.7V VCC = 5.5V, VIN = 0.4V VCC = 5.5V, VOUT = 2.25V VCC = 5.5V 2 VCC − 2 Control Inputs A or B Ports Control Inputs A or B Ports −50 Output HIGH Output LOW 3-STATE Switching Characteristics over recommended operating free air temperature range Parameter Conditions tPLH

PDF Datasheet Preview

DM74AS245 Octal Bus Transceiver with 3-STATE Outputs

DM74AS245 Octal Bus Transceiver with 3-STATE Outputs

This advanced Schottky device contains 8 pairs of 3-STATE logic elements configured as octal bus transceivers. These circuits are designed for use in memory, microprocessor systems and in asynchronous bidirectional data buses. Two way communication between buses is controlled by the DIR input. Data transmits either from the A bus to the B bus or from the B bus to the A bus. Both the driver and receiver outputs can be disabled via the G enable input which causes outputs to enter the high impedance mode so that the buses are effectively isolated.
s Advanced oxide-isolated, ion-implanted Schottky TTL process
s Non-inverting logic output s 3-STATE outputs independently controlled on

A and B buses s Low output impedance to drive terminated transmission
lines to s Switching response specified into pF s Specified to interface with CMOS at VOH = VCC − 2V s PNP inputs reduce input loading s Switching specifications guaranteed over full
temperature and VCC range
Ordering Code:

Order Number Package Number

Package Description

DM74AS245WM

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

DM74AS245SJ

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

DM74AS245N

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

Function Table

Control Inputs

Operation

B Data to A Bus A Data to B Bus

Hi-Z
2000 Fairchild Semiconductor Corporation DS006299

DM74AS245

Absolute Maximum Ratings Note 1

Supply Voltage, VCC 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
51.5°C/W 76.0°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

Parameter

Conditions

Input Clamp Voltage

HIGH Level Output

Voltage

LOW Level Output Voltage

Input Current at Max

Input Voltage

HIGH Level Input Current

LOW Level Input Current

Output Drive Current

Supply Current

VCC = 4.5V, IIN = −18 mA VCC = 4.5V, IOH = −3 mA VCC = 4.5V, IOH = −15 mA IOH = −2 mA, VCC = 4.5V to 5.5V VCC = 4.5V, IOL = Max VCC = 5.5V, VIN = 7V, VIN = 5.5V for A or B Ports VCC = 5.5V, VIN = 2.7V VCC = 5.5V, VIN = 0.4V VCC = 5.5V, VOUT = 2.25V VCC = 5.5V
2 VCC − 2

Control Inputs A or B Ports Control Inputs A or B Ports
−50 Output HIGH Output LOW 3-STATE

Switching Characteristics
over recommended operating free air temperature range

Parameter

Conditions
tPLH

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived DM74AS245WMX Datasheet file may be downloaded here without warranties.

Datasheet ID: DM74AS245WMX 513723