SI8431AB-C-IS Silicon Laboratories Inc, SI8431AB-C-IS Datasheet - Page 18

• Manufacturer Part Number: SI8431AB-C-IS
• Manufacturer: Silicon Laboratories Inc

Specifications of SI8431AB-C-IS

• Operating Supply Voltage (typ): 3.3/5V
• Lead Free Status / RoHS Status: Compliant

Si8430/31/35
18
Notes:
1. Enable inputs EN1 and EN2 can be used for multiplexing, for clock sync, or other output control. These inputs are
2. X = not applicable; H = Logic High; L = Logic Low.
3. When using the enable pin (EN) function, the output pin state is driven to a logic low state when the EN pin is disabled
Si8430
Si8431
Si8435
P/N
internally pulled-up to local VDD by a 3 µA current source allowing them to be connected to an external logic level (high
or low) or left floating. To minimize noise coupling, do not connect circuit traces to EN1 or EN2 if they are left floating. If
EN1, EN2 are unused, it is recommended they be connected to an external logic level, especially if the Si84xx is
operating in a noisy environment.
(EN = 0) in Revision C. Revision D outputs go into a high-impedance state when the EN pin is disabled (EN = 0). See
"4. Errata and Design Migration Guidelines (Revision C Only)" on page 24 for more details.
EN1
—
—
—
H
X
X
L
1,2
EN2
—
H
X
X
H
L
L
1,2
Outputs B1, B2, B3 are enabled and follow input state.
Outputs B1, B2, B3 are disabled and Logic Low or in high impedance state.
Output A3 enabled and follows input state.
Output A3 disabled and Logic Low or in high impedance state.
Outputs B1, B2 are enabled and follow input state.
Outputs B1, B2 are disabled and Logic Low or in high impedance state.
Outputs B1, B2, B3 are enabled and follow input state.
Table 13. Enable Input Truth Table
Rev. 1.2
Operation
1
3
3
3