MCP2122 Microchip Technology, MCP2122 Datasheet - Page 24

• 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 4-8:
TABLE 4-8:
DS21894B-page 24
AC Characteristics
Param.
IR101A E
IR101B E
IR131A T
IR103 T
IR130 T
IR132 T
IR133 T
IR134 T
IR135 T
IR110 T
16XCLK
No.
Note 1: Data in the Typical (“Typ”) column is at 5V, +25 C, unless otherwise stated. These parameters are for
RXIR
RX
Note: Refer to Figure 4-2 for load conditions.
2: These parameters (shaded) are characterized but are not tested. These values should be used for design
3: The RXIR pin operation is asynchronous to the 16XCLK pin. This is the error from the desired baud rate for
4: The RX pin operation is synchronous to the 16XCLK pin. Any error present on the 16XCLK pin
5: The minimum specification ensures that ALL pulses less then this pulse width are rejected, the maximum
RXBIT
RXIR
RXIR
RXIR
RXIR
RX
RXPDFIL
TX
RXIRBIT
RXBIT
design guidance only and are not tested.
guidance only.
the system.
(Parameter
specification ensures that ALL pulses greater than this pulse width are never rejected, and pulse widths
between these may or may not be rejected.
RF
SKW
Sym
L2
PW
P
J
RX
RXIR REQUIREMENTS
H RXIR Low AND 16XCLK
IR110
IR132
IR133
IR134
RXIR AND RX WAVEFORMS
Bit
RXIR Error
Host UART RX Error
RX pin rise time and fall
time
Receive (RX pin) Bit Rate
edge ( or ) to RX falling
edge ( )
RXIR pulse width
RXIR bit period
16XCLK to RXIR jitter
16XCLK to RX skew
RXIR Filter
IR131A
1C) will be refelected on the RX pin.
Characteristic
IR103
IR132
IR130
0
IR132
Bit
(1)
IR132
1
IR103
IR132
Preliminary
Standard Operating Conditions (unless otherwise specified)
Operating Temperature: –40 C
Operating Voltage V
Section 4.1 “DC Characteristics”.
Bit
1.41
Min
0.7
16
—
—
—
—
—
—
—
—
IR132
0
IR132
Typ
Bit
16
—
—
—
—
—
—
—
0
4
3
(1)
DD
IR132
3 T
0
range is described in
Max
± 2
2.5
1.4
25
16
—
—
—
—
IR132
XCLK
1
Bit ...
T
T
T
T
T
T
Units
A
XCLK
XCLK
XCLK
XCLK
XCLK
IR132
ns
µs
µs
µs
%
%
 2004 Microchip Technology Inc.
1
+125 C (Extended)
IR132
Note 2, 3
Note 2, 4
At 115,200 baud
At 9600 baud
Note 2
Note 5
Conditions
IR132
0