Table 2-2. AC Parameters: All I/O Interfaces
Parameter Symbol Direction Min Typ Max Unit Conditions
Power-Up
Delay
(2)
t
PU
To Crypto
Authentication
100 — — µs Minimum time between V
CC
> V
CC
min
prior to measurement of t
WLO
.
Wake Low
Duration
t
WLO
To Crypto
Authentication
60 — — µs
Wake High Delay
to Data Comm.
t
WHI
To Crypto
Authentication
1500 — — µs SDA should be stable high for this entire
duration.
High Side Glitch
Filter at Active
t
HIGNOR
E_A
To Crypto
Authentication
45
(1)
— — ns Pulses shorter than this in width will be
ignored by the device, regardless of its
state when active.
Low Side Glitch
Filter at Active
t
LIGNORE
_A
To Crypto
Authentication
45
(1)
— — ns Pulses shorter than this in width will be
ignored by the device, regardless of its
state when active.
Low Side Glitch
Filter at Sleep
t
LIGNORE
_S
To Crypto
Authentication
15
(1)
— — µs Pulses shorter than this in width will be
ignored by the device when in sleep mode.
Watchdog
Timeout
t
WATCHD
OG
To Crypto
Authentication
0.7 1.3 1.7 s Time from wake until device is forced into
sleep mode if Config.ChipMode.Bit2 is 0.
7.6 13 17 s Watchdog time : Config.ChipMode.Bit2 is 0.
Note:
1. These parameters are guaranteed through characterization, but not tested.
2. The power-up delay will be significantly longer if Power-On self test is enabled in the configuration
zone.
2.3.1 AC Parameters: Single-Wire Interface
Figure 2-2. AC Timing Diagram: Single-Wire Interface
t
START
t
ZHI
t
ZLO
Logic Ø
t
START
t
BIT
Logic 1
t
START
t
TURNAROUND
t
START
SDA
Table 2-3. AC Parameters: Single-Wire Interface
Unless otherwise specified, applicable from T
A
= -40°C to +85°C, V
CC
= +2.0V to +5.5V, C
L
= 100 pF.
ATECC608A
Electrical Characteristics
© 2017 Microchip Technology Inc.
Datasheet Summary
DS40001977A-page 8
