MD1730 datasheet(13/34 Pages) MICROCHIP

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 2016 Microchip Technology Inc.

DS20005586B-page 13

MD1730

3.0

PIN DESCRIPTION

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

6x6 VQFN

Symbol

Pin Function

Device Enable Input. When EN = 0, the SPI and the internal regulator are disabled. The

device is enabled when EN = 1. Note that the EN pin has no control over the clock

buffers, as the clock buffers have their dedicated enable pins.

CLKP

Positive Input of the Internal System Clock and is compatible with LVDS/SSTL. For

LVCMOS 2.5V input refer to Figure 4-8.

CLKN

Negative Input of the Internal System Clock and is compatible with LVDS/SSTL. For

LVCMOS 2.5V input refer to Figure 4-8.

4VLL

+2.5V Positive Voltage Power Supply, it requires a 1.0 µF decoupling capacitor to GND

5, 33

GND

Ground, 0V

6VDD

+5V Positive Voltage Power Supply, it requires a 1.0 µF decoupling capacitor to GND

SCK

Serial Peripheral Interface (SPI) clock input

CSN

Serial Peripheral Interface (SPI) chip-select. CSN is an active-low signal.

SDI

Serial Peripheral Interface (SPI) data input

SDO

Serial Peripheral Interface (SPI) data output

11, 35

CBE0-1

The clock buffer enable pin. When CBEn = 0, the corresponding clock buffer is

disabled. The clock buffer is enabled otherwise.

12, 34

CKB0-1

2.5V Single-ended Clock Buffer output pins

TXRW

CW Transmission Control pin. When TXRW = 0, the SPI is enabled for read/write.

When TXRW = 1, the SPI is disabled and the CW transmission is started.

14, 23

VGN

-10V Negative Voltage Power Supply, it requires a 2.2 µF capacitor to GND. The VGN

supply is also the substrate and should be the most negative supply to the chip.

15, 31

CNF

Negative Floating Supply Bypass Capacitor pin. Connects 1 µF/10V capacitor between

this pin and the VCW- pin.

16, 30

VCW-

-1V to -6V Negative Voltage Power Supply for the CW output, it requires a 1.0 µF

decoupling capacitor per pin to GND

17, 29

CPF

Positive Floating Supply Bypass Capacitor pin. Connects 1 µF/10V capacitor between

this pin and the VCW+ pin.

18, 28

VCW+

+1V to +6V Positive Voltage Power Supply for the CW output. It requires a 1.0 µF

decoupling capacitor per pin to GND.

19, 20, 21,

22, 24, 25,

26, 27

CW0-7

Channel 0-7 CW Waveform Output

VGP

+10V Positive Voltage Power Supply, it requires a 2.2 µF decoupling capacitor to GND

SPIB

SPI Broadcasting Mode pin. When SPIB = 1, the broadcast mode is enabled.

Exposed Thermal Pad (EP); must be connected to GND

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