MCP2122 Microchip Technology, MCP2122 Datasheet - Page 19

• 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

4.3
FIGURE 4-3:
TABLE 4-3:
 2004 Microchip Technology Inc.
AC Characteristics
Param.
No.
Note 1: Data in the Typical (“Typ”) column is at 5V, +25 C, unless otherwise stated. These parameters are for
1A
1C
1
3
4
16XCLK
2: All specified values are based on characterization data for that particular oscillator type under standard
3: A duty cycle of no more than 60/40 (High-Time/Low-Time or Low-Time/High-Time) is recommended for
4: This is the clock error from the desired clock frequency. The total system clock error includes the error from
5: These parameters (shaded) are characterized but are not tested. These values should be used for design
Timing Diagrams and Specifications
T
T
T
T
T
F
E
XCLK
XCLK
XCLK
Sym
XCLK
design guidance only and are not tested.
operating conditions with the device executing code. Exceeding these specified limits may result in an
unstable oscillator operation and/or higher than expected current consumption.
When an external clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
external clock inputs.
the transmitter and the error of receiver (from the desired clock frequency). If the transmitter is 2% fast from
the target frequency, and the receiver is 2% slow from the target frequency, the total error is 4%.
guidance only.
XCLK
XCLK
XCLK
R,
L,
H
F
EXTERNAL CLOCK TIMING REQUIREMENTS
External 16XCLK Period
(2, 3)
External 16XCLK
Frequency
Clock Error
Clock in (16XCLK)
Low or High Time
Clock in (16XCLK)
Rise or Fall Time
EXTERNAL CLOCK TIMING
Q4
Characteristic
(2, 3)
(4, 5)
Q1
(5)
1
Standard Operating Conditions (unless otherwise specified)
Operating Temperature: –40 C
Operating Voltage V
Section 4.1 “DC Characteristics”
Preliminary
542.5
Min
DC
—
50
—
Q2
Typ
—
—
—
—
—
3
(1)
DD
Q3
range is described in
1.8432
3
Max
7.5
±2
—
—
T
A
Units
MHz
Q4
4
ns
ns
ns
%
+125 C (Extended)
Note 5
Note 5
4
MCP2122
Conditions
Q1
DS21894B-page 19