TTL Input/5V CMOS Output

Applies to:

TTL Input/5V CMOS Output Simplified schematic

The port implements a 5V CMOS driver and a TTL-compliant receiver.

DC characteristics

Parameter	Conditions	Min.	Typ.	Max.	Units
ESD protection	Human Body Model (HBM)	2			kV

Note: The I/O port includes a latch-up protection.

Driver

Parameter	Conditions	Min.	Typ.	Max.	Units
Absolute maximum voltage rating		0		5	V
Low-level output current				24	mA
Low-level output voltage	@50µA		0.001	0.1	V
Low-level output voltage	@ 24 mA			0.81	V
High-level output current				-24	mA
High-level output voltage	@-50 µA; (1)	4.9	4.99		V
High-level output voltage	@-24 mA; (1)	3.89			V

Condition (1): 300 Ohms line termination resistor to GND.

Receiver

Parameter	Conditions	Min.	Typ.	Max.	Units
Absolute maximum voltage rating		0		5	V

AC characteristics

Driver

Parameter	Min.	Typ.	Max.	Units
Pulse width	500			ns
Pulse rate	0		1	MHz
10%-90% rise/fall time		TBD		ns

Receiver

Parameter	Min.	Typ.	Max.	Units
Pulse width	500			ns
Pulse rate	0		1	MHz
10%-90% rise/fall time		TBD		ns

Logical Map

The state of the port is reported as follows:

Compatible sources

Sources with the following drivers are compatible:

□

LVTTL ( 3.3 V low-voltage TTL)

□

CMOS (5V CMOS)

□

LVCMOS (3.3V CMOS)

Compatible loads

Loads with the following receivers are compatible:

□

TTL (5 V TTL)

□

CMOS (5V CMOS)