Pin

Name

Description

17

CNTRL1

CNTRL1 and CNTRL0 select the receiver modes. CNTRL1 and CNTRL0 both high place the unit in the receive

mode. CNTRL1 and CNTRL0 both low place the unit in the power-down (sleep) mode. CNTRL1 is a

high-impedance input (CMOS compatible). An input voltage of 0 to 300 mV is interpreted as a logic low. An input

voltage of Vcc - 300 mV or greater is interpreted as a logic high. An input voltage greater than Vcc + 200 mV

should not be applied to this pin. A logic high requires a maximum source current of 40 µA. Sleep mode requires a

maximum sink current of 1 µA. This pin must be held at a logic level; it cannot be left unconnected.

18

CNTRL0

CNTRL0 is used with CNTRL1 to control the receiver modes. CNTRL0 is a high-impedance input (CMOS compat-

ible). An input voltage of 0 to 300 mV is interpreted as a logic low. An input voltage of Vcc - 300 mV or greater is

interpreted as a logic high. An input voltage greater than Vcc + 200 mV should not be applied to this pin. A logic

high requires a maximum source current of 40 µA. Sleep mode requires a maximum sink current of 1 µA. This pin

must be held at a logic level; it cannot be left unconnected.

19

GND3

GND3 is an IC ground pin. It should be connected to GND1 by a short, low inductance trace.

20

RFIO

RFIO is the receiver RF input pin. This pin is connected directly to the SAW filter transducer. Antennas presenting

an impedance in the range of 35 to 72 ohms resistive can be satisfactorily matched to this pin with a series match-

ing coil and a shunt matching/ESD protection coil. Other antenna impedances can be matched using two or three

components. For some impedances, two inductors and a capacitor will be required. A DC path from RFIO to

ground is required for ESD protection.

11

file: rx5000v.vp, 2003.07.17 rev

Note: Specifications subject to change without notice.

0. 000

.0 7 7 5

.1 0 2 5

.1 1 7 5

.1 5 7 5

.1 9 7 5

.2 3 7 5

.2 7 7 5

.3 1 7 5

.3 5 7 5

.3 8 2 5

.4 6 0 0

D i m e ns i o ns i n i n c hes

S M - 2 0 L P C B P a d L a y o u t