E981.12A39BB ELMOS Semiconductor, E981.12A39BB Datasheet - Page 13

• Manufacturer Part Number: E981.12A39BB
• Description: Interface - Specialized Dual I/O Link Master Transciever
• Manufacturer: ELMOS Semiconductor

Specifications of E981.12A39BB

• Rohs: yes
• Product Type: Dual I/O link Master Transceiver
• Operating Supply Voltage: 3.3 V
• Supply Current: 5.5 mA
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-44
• Minimum Operating Temperature: - 40 C

Dual IO-Link Master Transceiver with UARTS
ADVANCE PRODUCT INFORMATION - JUL 26, 2011
6 Functional Description
6.1
The device has got four supply input pins:



VDDH is the general high-voltage supply pin. It supplies an internal low-voltage regulator for safe power
up, internal references and the voltage monitors.
Each of the transmitter supply pins L1 and L2 supplies one of the two internal transmitters.
This supply can be controlled by external PMOS transistors. The IC provides the gate voltage for these
external transistors and a current monitor to be able to limit the maximum current. If no external current
limitated switches are needed the pins L1 and L2 has to be connected to the VDDH supply.
Pin VDD has to be supplied by an external voltage supply with nominal 3.3V. VDD supplies the host
interface, the logic block and various other internal blocks. The logic block is set to its initial ("reset")
state by a power-on-reset signal, delivered by the VDD monitor.
6.2
The supply monitor provides status information of the supply voltages VDD, VDDH, L1 and L2 in SPI
register VMON STAT. For each flag an interrupt enable bit (IE) can be configured in register VMON IE.
Read access to register VMON STAT will clear the interrupts.
6.2.1
If the supply voltage at L1 or L2 falls below the UV
corresponding SPI register only and an interrupt is generated if configured. The transmitters keep
active.
If the supply voltage at L1 or L2 falls below the UV
If the VDDH supply voltage falls below the UV
6.2.2
If the VDD supply voltage falls below the V
falls below V
This document contains information on a new product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.
ELMOS Semiconductor AG
VDDH
L1, L2
VDD
Power supplies
Supply Monitor
VDDH, L1, L2 Monitor
VDD Monitor
DDPOR
– 24V supply
– 24V supply for the transceivers
– 3.3V supply for the digital blocks
threshold a power-on-reset is generated.
DDUV
Data Sheet 13 / 44
OFF
threshold a bit in the register VMON STAT is set. If VDD
threshold the external PMOS-FETs are switched-off.
IOLINK
OFF
threshold the transmitters are disabled.
threshold this condition is set in the
QM-No.: 25DS0069E.00
E981.12