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How many amperes of current can an output pin drive?

It is defined as output current, IOUT, in the Absolute Maximum Ratings table, which is the maximum limit per output.

The following table shows the absolute rated output current, IOUT, and DC Vcc/ground current, Icc, of the 74xxx244 (In the case of One-Gate logic 125 or 126 type.). The DC Vcc/ground current, Icc, is the maximum current per IC. The sum of the currents that flow through eight outputs must not exceed Icc. 

List of output current and power source/GND current (74xx244type) of absolute maximum rating

 

item Symbol (unit)
series
High speed Advance 5V logic
3.3V low speed
low voltage
middle speed
low voltage
high speed
CMOS
Logic
ICs
One-Gate
Logic
CMOS
Logic
ICs
CMOS
Logic
ICs
One-Gate
Logic
CMOS
Logic
ICs
One-Gate
Logic
CMOS
Logic
ICs
One-Gate
Logic
TC74HC TC7W TC74AC TC74VHC TC7SH
TC7WH
TC74LCX TC7SZ
TC7WZ
TC74VCX 7UL1G
output current IOUT
(mA)
±35 ±35 ±50 ±25 ±25 ±50 ±50 ±50 ±25
Power source / GND current
Icc/GND
(mA)
±75 ±37.5 ±200 ±75 ±50 ±100 ±50 ±100 ±50
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