Product Specification

SP4280

Page 2 of 7`

Table 2. Pin Descriptions

Table 3. Absolute Maximum Ratings

Electrostatic Discharge (ESD) Precautions

When handling this UTSi device, observe the

same precautions that you would use with other

ESD-sensitive devices. Although this device

contains circuitry to protect it from damage due to

ESD, precautions should be taken to avoid

exceeding the rating specified.

Latch-Up Avoidance

Unlike conventional CMOS devices, CMOS

devices are immune to latch-up.

Table 4. Operating Ranges @ 25 °C

Figure 3. Pin Configuration (Top View)

No.

Name

Description

1

GND

Ground

2

GND

Ground

RF1

RF I/O

GND

Ground

5

GND

Ground

6

GND

Ground

GND

Ground

RFC

Common

GND

Ground

10

GND

Ground

11

GND

Ground

GND

Ground

RF2

RF I/O

14

GND

Ground

15

GND

Ground

C2

Control 2

C1

Control 1

VSS / GND

Negative Supply Option

19

GND

Ground

20

VDD

Supply

Pad

GND

Ground Pad

Notes:

1. RF pins 3, 8, and 13 must be at 0 VDC. The RF pins do not require DC

blocking capacitors for proper operation if the 0 VDC requirement is met.

2. Pins 16 and 17 are the CMOS controls that set the three operating

states.

3. Connect pin 18 to GND to enable the on-chip negative voltage generator.

generator. Also, see paragraph “Switching Frequency.”

4. Customer can add external resistance to ground to change or modify

termination resistance.

Switching Frequency

The SP4280 has a maximum 25 kHz switching

rate when the internal negative voltage generator

is used (pin 18=GND). The rate at which the

SP4280 can be switched is only limited to the

switching time if an external -3 V supply is

Symbol

Parameter/Condition

Min

Max

Unit

Power supply voltage

-0.3

4.0

V

Voltage on any DC input

-0.3

0.3

V

RF CW power

24

dBm

Storage temperature

-65

150

°C

Operating temperature

-40

85

°C

ESD voltage

(Human Body Model)

1000

V

Parameter

Min

Typ

Max

Unit

2.7

3.0

3.3

V

8

20

µA

Control Voltage High

V

Control Voltage Low

V

Exceeding absolute maximum ratings may cause

permanent damage. Operation should be re-

stricted to the limits in the Operating Ranges ta-

ble. Operation between operating range maxi-

mum and absolute maximum for extended periods

may reduce reliability.

GND

15

14

13

12

11

3

4

5

2

1

GND

GND

GND

RF2

GND, RF2 Term.

GND

GND, RF1 Term.

RF1

GND

GND

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