MCP2122-E/PG Microchip Technology, MCP2122-E/PG Datasheet
MCP2122-E/PG
Specifications of MCP2122-E/PG
Related parts for MCP2122-E/PG
MCP2122-E/PG Summary of contents
Page 1
... Low-voltage operation • Extended temperature range • Low power consumption IrDA Family Selection Baud Rate Device Host IR UART MCP2120 2400 - 2400 - (1) (1) 312,500 312,500 MCP2122 2400 - 2400 - (1) (1) 115,200 115,200 MCP2140 9600 9600 MCP2150 9600 - 9600 - (2) (2) 115,200 115,200 MCP2155 9600 - ...
Page 2
... MCP2122 NOTES: DS21894B-page 2 Preliminary 2004 Microchip Technology Inc. ...
Page 3
... The IR transceiver also receives IR light pulses (data), which are outputted as electrical pulses. The MCP2122 decodes (demodulates) these electrical pulses, with the data then being transmitted by the MCP2122 UART. This modulation/demodulation method is performed in accordance with the IrDA standard. Table 1-1 shows an overview of some of the device features ...
Page 4
... MCP2122 TABLE 1-2: PIN DESCRIPTION Pin Number Pin Pin Name Type PDIP SOIC 16XCLK — SS RESET RXIR TXIR — DD Legend Schmitt Trigger input with CMOS levels I = Input P = Power O = Output DS21894B-page 4 Buffer Type Description ST 16x external clock source input ST Asynchronous receive from Host Controller UART — ...
Page 5
... RESET = L H (device in Normal Operation mode). The MCP2122 has a RESET noise filter in the RESET input signal path. The filter will detect and ignore small pulses. Using the RESET pin to enter a low-power state is discussed in Section 2.9 “ ...
Page 6
... MCP2122 2.3.1 BROWN-OUTS Some applications may subject the MCP2122 to a brown-out condition. Good design practice requires that when a system is in brown-out, the system should be in reset to ensure that the system known state when the system exits the brown-out. This brown-out circuitry is external to the MCP2122. ...
Page 7
... Clock) The MCP2122 requires an external clock source to operate. The 16XCLK pin is the device clock input (see Figure 2-5) and is independent of the host UART interface or the IR interface. The 16XCLK determines all timing during device operation the edge of the 16XCLK pin that causes activity to occur. ...
Page 8
... MCP2122 2.4.1 BAUD RATE The baud rate for the MCP2122 is determined by the frequency of the 16XCLK signal. Equation 2-1 demonstrates how to calculate the 16XCLK frequency based on the desired baud rate. Table 2-3 shows some common baud rates and the corresponding 16XCLK frequency. ...
Page 9
... MCP2122 16XCLK, TX and TXIR waveforms at 115200 baud for a single TX low bit. In this case, the TXIR is high for three 16XCLK pulses. In Figure 2-10, the MCP2122 is at 9600 baud for a single TX low bit. In this case, the TXIR is high for 3.55 µs (determined by pulse-width limiter circuit). ...
Page 10
... MCP2122 FIGURE 2-10: MCP2122 AT 9600 BAUD WAVEFORM TXIR Jitter of the TX input relative to the 16XCLK and TXIR DS21894B-page Preliminary 16XCLK Pulse 2004 Microchip Technology Inc. ...
Page 11
... TRANSMITTING When the controller sends serial data to the MCP2122, the baud rates are required to match. There will be some jitter on the detection of the high-to- low edge of the start bit. This jitter will affect the place- ment of the encoded start bit ...
Page 12
... MCP2122 3.0 DEVELOPMENT TOOLS There are currently no development tools for the MCP2122. A demo board is scheduled to be available soon. DS21894B-page 12 Preliminary 2004 Microchip Technology Inc. ...
Page 13
... Exposure to maximum rating conditions for extended periods may affect device reliability. 2004 Microchip Technology Inc. ..................................................................................................... –0.3V to +14V ................................................................................. –0. ∑(V – Preliminary MCP2122 + 0.3V DS21894B-page 13 ...
Page 14
... MCP2122 FIGURE 4-1: VOLTAGE-FREQUENCY (16XCLK) GRAPH, - (Volts) DS21894B-page 14 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1 1.8432 Frequency (MHz) Preliminary T +125 C A 2004 Microchip Technology Inc. ...
Page 15
... DD , RXIR = RXIR = V SS Preliminary MCP2122 +125 C (Extended) Conditions See Figure 4 1.8432 MHz 5.5V OSC DD ( RXIR = H) Transmitter ( RXIR = H) ( 1.8432 MHz 1.8V OSC 1.8432 MHz 5.5V OSC DD Receiver (RXIR = ...
Page 16
... MCP2122 DC Characteristics (Continued) DC CHARACTERISTICS Param Sym Characteristic No. V Input Low-Voltage IL Input pins D031 TX, RXIR D032 RESET D033 16XCLK V Input High-Voltage IH Input pins D041 TX, RXIR D042 RESET D043 16XCLK I Input Leakage IL (2, 3) Current D060A TX and 16XCLK D061 RESET D060B I RXIR IH Note 1: Data in the Typical (“Typ”) column is based on characterization results at +25 C. This data is for design guidance only and is not tested ...
Page 17
... DC spec, Section 4.1 DD “DC Characteristics”. (1) Min Typ Max Units — — 0.6 V — — 0 – 0.7 — — – 0.7 — — — — — 7 — pF Preliminary MCP2122 Conditions -0 -0 1.0 MHz A C DS21894B-page 17 ...
Page 18
... MCP2122 4.2 Timing Parameter Symbology and Load Conditions The timing parameter symbols have been created following one of the following formats: 4.2.1 TIMING CONDITIONS The temperature and voltages specified in Table 4-2 apply to all timing specifications, unless otherwise noted. Figure 4-2 specifies the load conditions for the timing specifications. ...
Page 19
... Standard Operating Conditions (unless otherwise specified) Operating Temperature: –40 C Operating Voltage V range is described in DD Section 4.1 “DC Characteristics” (1) Min Typ Max 542.5 — — DC — 1.8432 — — ±2 50 — — — — 7.5 (5) Preliminary MCP2122 +125 C (Extended) A Units Conditions ns MHz % Note Note 5 DS21894B-page 19 ...
Page 20
... MCP2122 FIGURE 4-4: I/O WAVEFORM 16XCLK RX or Old Value TXIR Pin Note: Refer to Figure 4-2 for load conditions. TABLE 4-4: I/O TIMING REQUIREMENTS AC Characteristics Param. Sym Characteristic No. (2, 3) 20A ToR RX pin rise time 20B 20C TXIR pin rise time 20D (2, 3) ...
Page 21
... Standard Operating Conditions (unless otherwise specified) Operating Temperature: – Operating Voltage V range is described in DD Section 4.1 “DC Characteristics”. (1) Min Typ Max Units 2000 — — ns — — 2 µs — — 2 µs Preliminary MCP2122 34A 34B +125 C (Extended) Conditions DS21894B-page 21 ...
Page 22
... MCP2122 FIGURE 4-6: TX AND TXIR WAVEFORMS Bit IR100 16XCLK TX IR114 IR113 IR122 IR120 IR115 TXIR IR121 0 TABLE 4-6: TX AND TXIR REQUIREMENTS AC Characteristics Param. Sym Characteristic No. IR100A T Transmit Baud Rate TXBIT IR100B T Transmit Baud Rate TXIRBIT IR102A E Host UART TX Error TXBIT IR102B ...
Page 23
... Smaller of Smaller of 3 — 3 1.41 3.5 5 — 16 — — — — Preliminary MCP2122 16 CLK Data bit x+1 1 IR113 T +125 C (Extended) A Units Conditions ns Note 2 T Note 2 XCLK T XCLK T At 115200 baud XCLK µs At 9600 baud (Note 3) T XCLK ns V 2.7V (Note 2) ...
Page 24
... MCP2122 FIGURE 4-8: RXIR AND RX WAVEFORMS Bit Bit IR110 16XCLK IR133 IR132 IR132 RXIR IR131A IR134 IR130 IR132 RX IR103 0 Note: Refer to Figure 4-2 for load conditions. TABLE 4-8: RXIR REQUIREMENTS AC Characteristics Param. Sym Characteristic No. IR101A E RXIR Error RXIRBIT IR101B E Host UART RX Error ...
Page 25
... DC AND AC CHARACTERISTICS GRAPHS AND TABLES The graphs and tables are not available at this time 2004 Microchip Technology Inc. Preliminary MCP2122 DS21894B-page 25 ...
Page 26
... MCP2122 NOTES: DS21894B-page 26 Preliminary 2004 Microchip Technology Inc. ...
Page 27
... Standard device marking consists of Microchip part number, year code, week code, and traceability code. 2004 Microchip Technology Inc. : Example GMCP2122 E/P256 0423 Or MCP2122 E/P 256 3 0503 Example: GMCP2122 E/SN0423 256 Or MCP2122E SN 0503 3 256 Preliminary MCP2122 DS21894B-page 27 ...
Page 28
... MCP2122 8-Lead Plastic Dual In-line (P) – 300 mil Body (PDIP Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width Lower Lead Width ...
Page 29
... L .019 .025 .030 .008 .009 .010 B .013 .017 .020 Preliminary MCP2122 A2 MILLIMETERS MIN NOM MAX 8 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.71 3.91 3.99 4.80 4.90 5.00 0.25 0.38 ...
Page 30
... MCP2122 NOTES: DS21894B-page 30 Preliminary 2004 Microchip Technology Inc. ...
Page 31
... Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. Customer Notification System Register on our web site (www.microchip.com) to receive the most current information on our products. 2004 Microchip Technology Inc. Examples MCP2122-E/PG: Lead Finish b) MCP2122-E/SNG: c) MCP2122T-E/SNG: Tape and Reel, Preliminary MCP2122 ...
Page 32
... MCP2122 NOTES: DS21894B-page 32 Preliminary 2004 Microchip Technology Inc. ...
Page 33
... PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
Page 34
... Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Taiwan - Hsinchu Tel: 886-3-572-9526 Fax: 886-3-572-6459 Preliminary 2004 Microchip Technology Inc. EUROPE Austria - Weis Tel: 43-7242-2244-399 Fax: 43-7242-2244-393 Denmark - Ballerup Tel: 45-4450-2828 Fax: 45-4485-2829 France - Massy Tel: 33-1-69-53-63-20 ...