DM74AS244N

Polarity : Non-Inverting
Number of Input Lines : 8
Supply Voltage - Max : 5.5 V
Number of Output Lines : 1
Supply Voltage - Min : 4.5 V
Packaging : Tube
Mounting Style : Through Hole
Package / Case : PDIP-20
Maximum Operating Temperature : + 70 C


Features:

·  Advanced oxide-isolated, ion-implanted Schottky TTL process
·  Improved switching performance with less power dissipation
   compared with Schottky counterpart
·  Functional and pin compatible with 74LS and Schottky counterpart
·  Switching response specified into 500W and 50 pF
·  Specified to interface with CMOS at VOH = VCC - 2


Pinout




Specifications

Supply Voltage, V_CC......................................................... 7V
Input Voltage ...................................................................7V
Voltage Applied to Disabled Output ...............................5.5V
Operating Free Air Temperature Range ...........0°C to +70°C
Storage Temperature Range ......................-65°C to +150°C
Typical qJA
N Package ..............................................................57.0°C/W
M Package ..............................................................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.


Description

This family of Advance Schottky 3-STATE Bus circuits, DM74AS244N are  designed to provide either bidirectional or unidirectional buffer interface in Memory, Microprocessor, and Communication Systems. The output characteristics of the circuits have low impedance sufficient to drive terminated transmission lines down to 133W. The input characteristics of the DM74AS244N circuits likewise have a high impedance so it will not significantly load the transmission line. The package contains eight 3-STATE buffers organized with four buffers having a common 3-STATE enable gate. The DM74AS240 and DM74AS244 are eight wide in a 20 pin package, and may be used as a 4 wide bidirectional or eight wide unidirectional. The buffer selection includes inverting and noninverting, with enable or disable 3-STATE control.