E981.10A52KC ELMOS Semiconductor, E981.10A52KC Datasheet - Page 10

• Manufacturer Part Number: E981.10A52KC
• Description: Interface - Specialized Basic I/O Link Transciever
• Manufacturer: ELMOS Semiconductor

Specifications of E981.10A52KC

• Rohs: yes
• Product Type: Basic I/O Link Transceiver
• Operating Supply Voltage: 3.3 V
• Supply Current: 1.5 mA
• Maximum Power Dissipation: 900 mW
• Maximum Operating Temperature: + 100 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-20
• Minimum Operating Temperature: - 40 C

5.2 Host interface
The logic level at the digital interface pins must be in accordance with the supply of the external control circuitry.
This supply voltage is applied to pin VDD_IO. Level shifter adapt the logic information to the internal supply. Thus
the IC can operate together with control devices operating from 3.3V or 5V supplies. Digital input pins have pull-
up/down circuits in order to avoid erroneous response of the IC in case of broken control lines.
Input pins: TXEN, TXD, SPEED, SILIM
Output pins: RXD, WAKE, ILIM
A high level at pin TXEN enables the transmitter. A low level (default value if not connected) turns the transmit-
ter off.
TXD determines the output level of the active transmitter. The default level is high. A low level at pin SPEED (de-
fault level) sets the transmitter to a transmission rate of 38.4 kBaud, high level to 230.4 kBaud.
A high level at pin SILIM divides the overcurrent threshold in low side and high side driver by 2 in contrast to the
low level at SILIM.
Pin RXD provides the receiver output information from reading the level at pin CQ.
A high level at pin WAKE indicates the detection of a wake up event.
A high level at pin ILIM signals an overcurrent condition for the transmitter at pin CQ.
5.3 transmitter
The push- pull transmitter is activated with a high level on pin TXEN and drives the C/Q pin low or high in accor-
dance with the inverted logic level on pin TXD. A slope control limits EME. The transition times can be set for two
different baud rates. SPEED=low is default 38.4 kBaud or 4.8 kBaud, SPEED=high sets the transmission speed to
230.4 kBaud.
The transmitter is operable only if VDD and VDD_IO are within their specified limits.
In SIO mode the transmitter must be used in highspeed mode (SPEED=high) to enable a wide range of different
load conditions.
ELMOS Semiconductor AG
tXen
HIGH
HIGH
LOW
LOW
Pin SPEED
HIGH
HIGH
LOW
LOW
HIGH
tXD
LOW
Data Sheet
10/19
Transmission rate
230.4 kBaud
38.4 kBaud
HIGH-Z
HIGH-Z
HIGH
LOW
c/Q
QM-No.: 25DS0007E.02 2010-06-16
Inverted C/Q
Inverted C/Q
HIGH
LOW
rXD
E981.10