AT88SC0404C-PI Atmel, AT88SC0404C-PI Datasheet - Page 63

• Manufacturer Part Number: AT88SC0404C-PI
• Manufacturer: Atmel

Specifications of AT88SC0404C-PI

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: PDIP
• Mounting: Through Hole
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

12.
12.1. High Voltage and Low Voltage Limit
12.2. Minimum Clock Pulse
12.3. Maximum Clock Frequency
12.4. Power On Reset (POR) Delay
12.5. Noise Suppression
62
DC Tamper Detection Limits
The Atmel
the limits of reliable circuit operation.
If V
levels and before the device operation can begin again.
In synchronous operation if the clock pulse width falls below the limit of this circuit the device will enter a reset
sequence.
In asynchronous operation if the clock frequency exceeds the limit of this circuit the device will enter a reset sequence.
Anytime the device is reset either on initial power up or by a tamper detection circuit, there is a time delay from when
normal conditions are restored to when the device may be operated. During this reset sequence all security flags within
the device are reset to their initial values.
Pulses of short duration on SCL/CLK, SDA/IO and RST are ignored if they fall below the threshold of this circuit. The
pulses are filtered out and the device does not enter the reset sequence.
Table 50. Tamper Detection
Applicable over recommended operating range from TAC = -40° to +85° C (unless otherwise noted)
Atmel AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
Symbol
CC
V
V
t
t
t
f
POR
CLK
CLK
SUP
is taken below or above these voltage limits the device will enter a reset sequence once V
CC
CC
®
CryptoMemory
High Voltage Limit
Low Voltage Limit
Minimum CLK pulse width
Minimum CLK frequency
POR Delay
Min. SCL, SDA, RST pulse
Parameter
®
device family incorporates several tamper detection circuits to prohibit operation outside
Synchronous Operation
Asynchronous Operation
Test Condition
Min
200
6.0
2.0
12
10
50
Typ
CC
is returned to normal
Max
280
200
6.5
2.4
14
70
5211C–SMIC–01/10
Units
MHz
µS
nS
nS
V
V