C8051F340-GQR Datasheet, PDF (26/276 Pages) Silicon Laboratories – Full Speed USB Flash MCU Family

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
Table 3.1. Global DC Electrical Characteristics (Continued)
–40 to +85 °C, 25 MHz System Clock unless otherwise specified.
Parameter
Conditions
Min Typ Max
I_DD Frequency Sensitivity^3,6 V_DD = 3.3 V, SYSCLK < 1 MHz, 
0.44
T = 25 ºC
V_DD = 3.3 V, SYSCLK > 1 MHz, 
0.32
T = 25 ºC
Units
mA/MHz
mA/MHz
V_DD = 3.6 V, SYSCLK < 1 MHz, 
T = 25 ºC
V_DD = 3.6 V, SYSCLK > 1 MHz, 
T = 25 ºC
0.49
mA/MHz
0.36
mA/MHz
Digital Supply Current (Stop
Mode, shutdown)
Oscillator not running, 
V_DD monitor disabled
< 0.1
µA
Digital Supply Current for USB _{VDD = 3.3 V, USB Clock = 48 MHz}
8.69
mA
Module (USB Active Mode)
V_DD = 3.6 V, USB Clock = 48 MHz
9.59
mA
Digital Supply Current for USB Oscillator not running
Module (USB Suspend Mode) V_DD monitor disabled
< 0.1
µA
Notes:
1. USB Requires 3.0 V Minimum Supply Voltage.
2. SYSCLK must be at least 32 kHz to enable debugging.
3. Based on device characterization of data; Not production tested.
4. Active and Inactive I_DD at voltages and frequencies other than those specified can be calculated using the I_DD
Supply Sensitivity. For example, if the V_DD is 3.0 V instead of 3.3 V at 24 MHz: I_DD = 13.9 mA typical at 3.3 V
and SYSCLK = 24 MHz. From this, I_DD = 13.9 mA + 0.46 x (3.0 V – 3.3 V) = 13.76 mA at 3.0 V and SYSCLK
= 24 MHz.
5. I_DD can be estimated for frequencies < 30 MHz by multiplying the frequency of interest by the frequency
sensitivity number for that range. When using these numbers to estimate I_DD for > 30 MHz, the estimate should
be the current at 24 MHz (or 48 MHz) minus the difference in current indicated by the frequency sensitivity
number. For example: V_DD = 3.3 V; SYSCLK = 35 MHz, I_DD = 13.9 mA – (24 MHz – 35 MHz) x 0.44 mA/MHz =
18.74 mA.
6. Idle I_DD can be estimated for frequencies < 1 MHz by multiplying the frequency of interest by the frequency
sensitivity number for that range. When using these numbers to estimate Idle I_DD for > 1 MHz, the estimate
should be the current at 24 MHz (or 48 MHz) minus the difference in current indicated by the frequency
sensitivity number. For example: V_DD = 3.3 V; SYSCLK = 5 MHz, Idle I_DD = 8.25 mA – (24 MHz – 5 MHz) x
0.32 mA/MHz = 2.17 mA.
Other electrical characteristics tables are found in the data sheet section corresponding to the associated
peripherals. For more information on electrical characteristics for a specific peripheral, refer to the page
indicated in Table 3.2.
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Rev. 1.3