SAE81C91N Infineon Technologies, SAE81C91N Datasheet - Page 18

• Manufacturer Part Number: SAE81C91N
• Manufacturer: Infineon Technologies

Specifications of SAE81C91N

• Number Of Transceivers: 1
• Power Down Mode: Sleep
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Output Programming
OCTP.n
TnP is the output transistor switching to V
TXn is the output level at the transmit pin.
Clock Control Register
The Clock Control Register determines the output frequency at pin CLKOUT which is derived from
the oscillator frequency.
CCR
Address: 14
Reset Value: 01
Bit(field)
CC
The Clock Control Register requires a special protocol for writing in order to prevent the clock output
from being changed inadvertently:
Note: Not defined bit positions must be ’0’ for write accesses.
Semiconductor Group
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Step 1: Write 80
Step 2: Write desired value to CC (bits 7...4 must be ’0000’)
OCTN.n OCP.n
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
H
H
Function
Clock Output Control
’0000’: f
’0001’: f
’0010’: f
’0011’: f
’0100’: f
’0101’: f
’0110’: f
’0111’: f
’1XXX’: f
H
to CC
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
7
-
-
CLKOUT
CLKOUT
CLKOUT
CLKOUT
CLKOUT
CLKOUT
CLKOUT
CLKOUT
CLKOUT
Data
0 = dominant
1 = recessive
0
1
0
1
0
1
0
1
0
1
0
1
0
1
07Feb95@09:05h Intermediate Version
6
-
-
= f
= f
= f
= f
= f
= f
= f
= f
= LOW (clock output is switched off)
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
/ 2
/ 4
/ 6
/ 8
/ 10
/ 12
/ 14
DD
5
, TnN switches to V
-
-
17
4
-
-
TnP
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
w
SS
3
.
TnN
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
w
2
CC
SAE 81C90/91
TXn-Level
float
float
float
float
LOW
float
float
LOW
float
HIGH
HIGH
float
LOW
HIGH
HIGH
LOW
w
1
w
0