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DM74AS245
Absolute Maximum Ratings(No te 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the saf ety of the device cannot be guarante ed. The device s hould not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not gua rant eed at the absolute maximum ratin gs.
The “Re comme nded Operat ing Co ndition s” table will define the cond itions
for actu al device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temper ature range
Switching Characteri stics
over recommended operating free air temper ature range
Supply Voltage, VCC 7V
Input Voltage
Control Inputs 7V
I/O Ports 5.5V
Operating Free Air Temperature Range 0°C to 70°C
Storage Temper ature Range −65°C to +150°C
Typical θJA
N Package 51.5°C/W
M Package 76.0°C/W
Symbol Parameter Min Typ Max Units
VCC Supply Voltage 4.5 5 5.5 V
VIH HIGH Level Input Voltage 2 V
VIL LOW Level Input Voltage 0.8 V
IOH HIGH Level Output Current −15 mA
IOL LOW Level Output Current 48 mA
TAFree Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min Typ Max Units
VIK Input Clamp Voltage VCC = 4.5V, IIN = −18 mA −1.2 V
VOH HIGH Level Output VCC = 4.5V, IOH = −3 mA 2.4 3.2
Voltage VCC = 4.5V, IOH = −15 mA 2 2.3 V
IOH = −2 mA, VCC = 4.5V to 5.5V VCC − 2
VOL LOW Level Output Voltage VCC = 4.5V, IOL = Max 0.35 0.55 V
IIInput Current at Max VCC = 5.5V, VIN = 7V, 0.1 mA
Input Voltage (VIN = 5.5V for A or B Ports)
IIH HIGH Level Input Curre nt VCC = 5.5V, Control Inputs 20 µA
VIN = 2.7V A or B Ports 70
IIL LOW Level Input Current VCC = 5.5V, Control Inputs −0.5 mA
VIN = 0.4V A or B Ports −0.75
IOOutput Drive Current VCC = 5.5V, VOUT = 2.25V −50 −150 mA
ICC Supply Current VCC = 5.5V Output HIGH 62 97
Output LOW 95 149 mA
3-STATE 79 123
Symbol Parameter Conditions From To Min Max Units
tPLH Propagati on Delay T i me VCC = 4.5V to 5.5V, A or B B or A 2 7.5 ns
HIGH-to-LOW Level Output R1 = R2 = 500Ω,
tPHL Propagation Del ay T ime CL = 50 pF A or B B or A 2 7 ns
HIGH-to-LOW Level Output
tPZL Output Enable Time to LOW Level G A or B 2 8.5 ns
tPZH Output Enable Time to HIGH Level G A or B 2 9 ns
tPLZ Output Disable Time from LOW Level G A or B 2 9.5 ns
tPHZ Output Disable Time from HIGH Leve l G A or B 2 5.5 ns