AS3932-BTST austriamicrosystems, AS3932-BTST Datasheet - Page 30

• Manufacturer Part Number: AS3932-BTST
• Description: IC RF PROGRAM 16-TSSOP
• Manufacturer: austriamicrosystems

Specifications of AS3932-BTST

• Rf Type: Read / Write
• Frequency: 110kHz ~ 150kHz
• Features: RSSI Equipped
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS3932-BTSTTR

AS3932
Datasheet - D e t a i l e d D e s c r i p t i o n
8.8.3 External Clock Source
To clock the AS3932 with an external signal the crystal oscillator has to be enabled (R1<1>=1). As shown in the
applied on the pin XIN while the pin XOUT must stay floating. The RC time constant has to be 15µs with a tolerance of ±10% (e.g. R=680 kΩ
and C=22pF). In the
Table 25. Characteristics of External Clock
Note: In power down mode the external clock has to be set to V
8.9 Channel Selection in Scanning Mode and ON/OFF Mode
In case only 2 channels are active and one of the Low Power modes is enabled, then the channels 1 and 3 have to be active. If the chip works in
On-Off mode and only one channel is active then the active channel has to be the channel 1.
Both Low Power modes are not allowed to be enabled at the same time.
www.austriamicrosystems.com/LF-Receiver/AS3932
Symbol
T = RC
Vh
VI
Tr
Tf
Table 25
RC Time constant
Parameter
High level
Low level
Rise-time
the clock characteristics are summarized.
Fall-time
DD
Revision 1.4
Conditions
.
0.9 *
V
13.5
Min
DD
0
Figure 3
Typ
15
the clock must be
0.1 *
V
V
Max
16.5
DD
DD
3
3
Units
µs
µs
µs
V
V
30 - 36