AD9549/PCBZ Analog Devices Inc, AD9549/PCBZ Datasheet - Page 12

• Manufacturer Part Number: AD9549/PCBZ
• Description: BOARD EVALUATION FOR AD9549
• Manufacturer: Analog Devices Inc

Specifications of AD9549/PCBZ

• Main Purpose: Timing, Clock Generator
• Embedded: No
• Utilized Ic / Part: AD9549
• Primary Attributes: 2 Inputs, 2 Outputs, VCO
• Secondary Attributes: CMOS, HSTL Output Logic, Graphical User Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9549
Pin No.
60
61
62
63
64
Exposed
Die Pad
Input/
Output
I
I
O
I/O
I
O
Pin Type
3.3 V CMOS
3.3 V CMOS
3.3 V CMOS
3.3 V CMOS
3.3 V CMOS
GND
Mnemonic
IO_UPDATE
CSB
SDO
SDIO
SCLK
EPAD
Rev. D | Page 12 of 76
Description
I/O Update. A logic transition from 0 to 1 on this pin transfers data from the I/O
port registers to the control registers (see the Write section). This pin has an
internal 50 kΩ pull-down resistor.
Chip Select. Active low. When programming a device, this pin must be held
low. In systems where more than one AD9549 is present, this pin enables
individual programming of each AD9549. This pin has an internal 100 kΩ pull-
up resistor.
Serial Data Output. When the device is in 3-wire mode, data is read on this pin.
There is no internal pull-up/pull-down resistor on this pin.
Serial Data Input/Output. When the device is in 3-wire mode, data is written
via this pin. In 2-wire mode, data reads and writes both occur on this pin. There
is no internal pull-up/pull-down resistor on this pin.
Serial Programming Clock. Data clock for serial programming. This pin has an
internal 50 kΩ pull-down resistor.
Analog Ground. The exposed thermal pad on the bottom of the package pro-
vides the analog ground for the part. This exposed pad must be connected to
ground for proper operation.