AMIS-49250-XTP ON Semiconductor, AMIS-49250-XTP Datasheet - Page 14
![IC TXRX FIELDBUS MAU 44NQFP](/photos/6/86/68684/44-qfp_560bd_sml.jpg)
AMIS-49250-XTP
Manufacturer Part Number
AMIS-49250-XTP
Description
IC TXRX FIELDBUS MAU 44NQFP
Manufacturer
ON Semiconductor
Type
Transceiverr
Datasheet
1.AMIS-49200-XTD.pdf
(22 pages)
Specifications of AMIS-49250-XTP
Number Of Drivers/receivers
1/1
Protocol
MDS-MAU
Voltage - Supply
4.75 V ~ 6.2 V
Mounting Type
Surface Mount
Package / Case
44-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AMIS-49250-XTP
Manufacturer:
ON Semiconductor
Quantity:
10 000
AMIS-492x0
4.3 Transmit Block
The transmit block contains four sub-blocks:
4.3.1. MDS-interface
The MDS-interface decodes input signals to generate internal control signals. The POL pin is used to select the polarity of TxE (transmit
enable). The TxE and TxS (transmit signal) are the MDS-MAU interface signals. These three signals are CMOS logic signals powered
by the V
connected to V
MDS_CTRL Pin 26 can be used to control MDS interface operation. Table 11 shows the resulting VDRV output for the various
combinations of interface signals.
Table 11: MDS-interface Logic
4.3.2. Tri-level Modulator
The tri-level modulator switches current signals into a summing node. The slew rate controller converts the current to a voltage signal,
VDRV. The DC level of silence (V
2.1V, yielding an amplitude of 0.8V.
POL
High
Low
1.
2.
3.
4.
MDS-interface – decodes input signals to generate internal control signals.
Tri-level modulator – generates current signals used as inputs to the slew-rate controller.
Slew rate controller – converts current to three distinct VDRV voltage levels (V
Current drive amplifier – op amp designed to drive current drivers for 31.25kbps voltage-mode medium.
DD
High
High
TxE
Low
Low
supply voltage. When POL is connected to GND, TxE is assumed to be active high (positive logic). Likewise, if POL is
DD
, TxE is assumed to be active low (negative logic).
High
High
High
High
TxS
Low
Low
Low
Low
VDRV
V
V
V
V
V
V
S
H
H
S
L
L
S
) is nominally 2.5V. Transmission high (V
Rev. 6 | Page 14 of 22 | www.onsemi.com
Figure 8: MDS Interface
See Table 1 on page 7, Table 11, and Figure 8 to see how
H
) is nominally 2.9V and transmission low (V
S
, V
H
, V
L
).
L
) is nominally