Datasheet

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Parameter Symbol Min. Typ. Max. Unit Conditions
Output Low
Voltage
V
OL
— — 0.4 V When device is in active mode,
V
CC
= 2.5 to 5.5V
Output Low
Current
I
OL
— — 4 mA When device is in active mode,
V
CC
= 2.5 to 5.5V, V
OL
= 0.4V
Theta JA Ɵ
JA
— 166 — °C/W SOIC (SSH)
— 173 — °C/W UDFN (MAH)
— 146 — °C/W RBH
2.4.1 V
IH
and V
IL
Specifications
The input levels of the device will vary dependent on the mode and voltage of the device. The input
voltage thresholds when in Sleep or Idle mode are dependent on the V
CC
level as shown in Figure 2-4.
When in sleep or idle mode the TTLenable bit has no effect.
When the device is active (i.e., not in Sleep or Idle mode), the input voltage thresholds are different
depending upon the state of TTLenable (bit 1) within the ChipMode byte in the Configuration zone of the
EEPROM. If the voltage supplied to the V
CC
pin of the ATECC608A is higher than the system voltage to
which the input pull-up resistor is connected, then the system designer may choose to set TTLenable to
zero. This enables a fixed input threshold shown by Table 2-6.
Table 2-6. V
IL
, V
IH
on All I/O Interfaces (TTLenable = 0)
Parameter
Symbol Min. Typ. Max. Unit Conditions
Input Low Voltage V
IL
-0.5 — 0.5 V When device is active and TTLenable bit in
configuration memory is zero; otherwise, see
above.
Input High Voltage V
IH
1.5 — V
CC
+ 0.5 V When device is active and TTLenable bit in
configuration memory is zero; otherwise, see
above.
ATECC608A
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Summary
DS40001977B-page 11