MCP2122 Microchip Technology, MCP2122 Datasheet - Page 22

• Manufacturer Part Number: MCP2122
• Description: Converts serial data from UART bitstreams to IrDA standard bitstreams (encodes) and from IrDA standard bitstreams to UART bitstreams ...
• Manufacturer: Microchip Technology

MCP2122
FIGURE 4-6:
TABLE 4-6:
DS21894B-page 22
AC Characteristics
Param.
IR100A
IR100B
IR102A
IR102B
IR121A
IR121B
IR120 T
IR122
IR123
IR113
IR114
No.
Note 1: Data in the Typical (“Typ”) column is at 5V, +25 C, unless otherwise stated. These parameters are for
16XCLK
TX
TXIR
2: These parameters (shaded) are characterized but are not tested. These values should be used for design
3: The TX pin operation may be asynchronous to the 16XCLK pin. This is the error from the desired baud rate
4: The TXIR pin operation is synchronous to the 16XCLK pin. Any error present on the 16XCLK pin
5: This specification is not tested. This value is from the design target.
IR114
TX
T
T
T
E
T
design guidance only and are not tested.
guidance only.
for the system.
(Parameter
T
T
E
T
TXPDIR
TXIR
TXIRBIT
TXIR
TXIRBIT
Sym
L2
TXIR
TXBIT
TX
TXBIT
TXIR
RF
PW
RF
P
TX AND TXIR REQUIREMENTS
J
H TX falling edge ( ) to
IR100
TX AND TXIR WAVEFORMS
Transmit Baud Rate
Transmit Baud Rate
Host UART TX Error
TXIR Error from 16XCLK
TX pin rise time and fall
time
16XCLK to TX jitter
TXIR rising edge ( )
TXIR pulse width
TXIR bit period
TXIR pin rise time and fall
time
1C) will be refelected on the TXIR pin.
Bit
IR113
0
IR122
Characteristic
IR120
IR115
IR121
(1)
Bit
1
IR113
IR122
(1)
Standard Operating Conditions (unless otherwise specified)
Operating Temperature: –40 C
Operating Voltage V
Section 4.1 “DC Characteristics”.
Preliminary
Bit
1.41
Min
0
16
—
—
—
—
—
—
—
7
3
IR122
Typ
3.5
16
16
—
—
—
—
—
—
—
0
Bit
(1)
0
DD
IR122
range is described in
Max
± 2
—
16
—
25
—
10
1
8
3
5
Bit ...
1
T
T
T
T
T
T
T
Units
IR122
A
XCLK
XCLK
XCLK
XCLK
XCLK
XCLK
ns
µs
ns
%
%
 2004 Microchip Technology Inc.
+125 C (Extended)
Note 2, 3
Note 2, 4
Note 2
Note 2
At 115200 baud
At 9600 baud (Note 5)
50 pF load (Note 2)
0
IR122
Conditions