DM74LS244WM

DM74LS244WM Datasheet


DM74LS244 Octal 3-STATE Buffer/Line Driver/Line Receiver

Part Datasheet
DM74LS244WM DM74LS244WM DM74LS244WM (pdf)
Related Parts Information
DM74LS244N DM74LS244N DM74LS244N
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DM74LS244 Octal 3-STATE Buffer/Line Driver/Line Receiver

DM74LS244 Octal 3-STATE Buffer/Line Driver/Line Receiver

These buffers/line drivers are designed to improve both the performance and PC board density of 3-STATE buffers/ drivers employed as memory-address drivers, clock drivers, and bus-oriented transmitters/receivers. Featuring 400 mV of hysteresis at each low current PNP data line input, they provide improved noise rejection and high fanout outputs and can be used to drive terminated lines down to
s 3-STATE outputs drive bus lines directly
s PNP inputs reduce DC loading on bus lines s Hysteresis at data inputs improves noise margins
s Typical IOL sink current
24 mA
s Typical IOH source current −15 mA
s Typical propagation delay times

Inverting

Noninverting 12 ns s Typical enable/disable time 18 ns s Typical power dissipation enabled

Inverting
130 mW

Noninverting 135 mW
Ordering Code:

Order Number Package Number

Package Description

DM74LS244WM

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

DM74LS244SJ

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

DM74LS244N

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

Inputs

L = LOW Logic Level H = HIGH Logic Level X = Either LOW or HIGH Logic Level Z = High Impedance

Output

Y L H Z
2000 Fairchild Semiconductor Corporation DS008442

DM74LS244

Absolute Maximum Ratings Note 1

Supply Voltage

Input Voltage

Operating Free Air Temperature Range 0°C to +70°C

Storage Temperature Range
−65°C to +150°C

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 unless otherwise noted

Parameter

Min Conditions

Input Clamp Voltage

VCC = Min, II = −18 mA

Hysteresis VT+ − VT−

VCC = Min

Data Inputs Only

HIGH Level Output Voltage

LOW Level Output Voltage

IOZH IOZL

Off-State Output Current, HIGH Level Voltage Applied Off-State Output Current, LOW Level Voltage Applied

VCC = Min, VIH = Min

VIL = Max, IOH = −1 mA

VCC = Min, VIH = Min

VIL = Max, IOH = −3 mA

VCC = Min, VIH = Min

VIL = 0.5V, IOH = Max

VCC = Min

IOL = 12 mA

VIL = Max
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Datasheet ID: DM74LS244WM 513781