MCP2140-IP datasheet(36/58 Pages) MICROCHIP

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MCP2140

DS21790A-page 36

Preliminary

 2003 Microchip Technology Inc.

FIGURE 4-9:

RXPD/RXPDREF WAVEFORMS

TABLE 4-9:

RXPD/RXPDREF REQUIREMENTS

AC Specifications

Electrical Characteristics:

Standard Operating Conditions (unless otherwise specified):

Operating Temperature: -40

°C ≤ TA ≤ +85°C (industrial)

Operating Voltage VDD range is described in Section 4.1

Param.

No.

Sym

Characteristic

Min

Typ

Max

Units

Conditions

IR110A TRXPDBIT Receive Baud Rate

768

—

768

TOSC

BAUD = 9600

IR131A TRXPDPW RXPD pulse width

0.01

—

1.5

µs

IR132

TRXPDP RXPD/RXPDREF bit period (1)

—

TBITCLK

IRD060 VRXPDD

∆ Quiescent Delta Voltage

between RXPD and

RXPDREF

—

IRD061 VRXPDE IR Pulse Detect Delta Voltage

(RXPD to RXPDREF)

—

RXPD signal must cross

RXPDREF signal level

IR133

TRESP

Response Time (2)

—

400 *

* These parameters characterized but not tested.

Note 1: TBITCLK = TRXBIT/16.

2: Response time measured with RXPDREF at (VDD - 1.5V)/2, while RXPD transitions from VSS to VDD.

BITCLK

RXPD

IR131A

IR110A

IR131B

Start Bit

Data bit 7

Data bit 6

Data bit 5

Data bit ...

Start Bit

Data bit 7

Data bit 6

Data bit 5

Data bit ...

RXPDREF

RXPD

RXPDREF

IRD160

IRD161

RXPD

RXPDREF

IRD160

IRD161

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