DM74AS245SJX

DM74AS245SJX Datasheet


DM74AS245 Octal Bus Transceiver with 3-STATE Outputs

Part Datasheet
DM74AS245SJX DM74AS245SJX DM74AS245SJX (pdf)
Related Parts Information
DM74AS245N DM74AS245N DM74AS245N
DM74AS245WM DM74AS245WM DM74AS245WM
DM74AS245WMX DM74AS245WMX DM74AS245WMX
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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
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Datasheet ID: DM74AS245SJX 513723