ST7538QTR STMicroelectronics, ST7538QTR Datasheet - Page 30

• Manufacturer Part Number: ST7538QTR
• Description: IC TXRX FSK POWER LINE 44-TQFP
• Manufacturer: STMicroelectronics
• Type: Transceiverr

Specifications of ST7538QTR

• Number Of Drivers/receivers: 1/1
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 44-TQFP Exposed Pad, 44-eTQFP, 44-HTQFP, 44-VQFP
• For Use With: 497-5484 - BOARD EVAL ST7538 PWR LINE TXRX
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Protocol: -
• Other names: 497-5526-2

Functional description
5.9
30/44
Figure 17. PLI startup timing diagram
Crystal oscillator
ST7538Q integrates a inverter driver circuit to realize a 16MHz crystal oscillator.
This circuit is able to drive a maximum load capacitance of 16pF with typical quartz ESR of
40Ω .
If the internal driver circuit is used, only one external crystal quartz and two external load
capacitors (C
Figure 18. Typical crystal configuration if internal crystal driver circuit is used
If an external oscillator is used, XOUT must be disconnected, while XIN must satisfies the
specifications given in
1
and C
ATOP2
RX/TX
2
) are needed to realize the oscillator function
Table 4
STEP NUMBER 16
T
C
RXTX
4V
0V
1
(see
XOUT
T
Figure
ST
XIN
19).
C
T
17
2
ALC
18
D03IN1425A
D03IN1408
31
(Figure
18).
ST7538Q