Micrel, Inc.

MICRF302

October 2008

4

M9999-100908-A

Absolute Maximum Ratings

(1)

Voltage on Any Pin................... VSS - 0.3 V to VDD + 0.3 V

Junction Temperature ................................-55°C to +150°C

Storage Temperature .................................-65°C to +150°C

Lead Temperature (soldering, 10 s)......................... +300°C

ESD Rating

Operating Ratings

(2)

Ambient/junction Temperature.....................-40°C to +85°C

Electrical Characteristics

Parameter

Condition

Min

Typ

Max

Units

Operating Supply Current

Fully Operational

130

200

µA

Standby Current

Chip Disabled

0.3

1

µA

Analog Section

MICRF302 Parallel Encoder Timing (Note 4)

On-chip oscillator frequency accuracy

Does not depend on data rate

-10

0

+10

%

One bit time

0.9

1.0

1.1

ms

One packet time

98

ms

Delay between data packets

5

ms

Switch closure to TXEN (TD_TXEN)

Does not depend on data rate

<1

µs

Transmit Timeout

(6)

Does not depend on data rate

22.5

25

27.5

s

Transmit Enable to Data Out (TTXEN_DOUT)

36

40

44

ms

Pulse rejection (deglitch) by D0-D3 (Note 5)

Does not depend on data rate

7.2

8

8.8

ms

Digital Section

Input Low Voltage

D0 to D3 pins

0.1 VDD

V

Input High Voltage

D0 to D3 pins

0.9 VDD

V

Output High Voltage

TXEN/DOUT pin, 1µA Load

0.9 VDD

V

Output Low Voltage

TXEN/DOUT pin, 1µA Load

0.1 VDD

V

Output Tr, Tf

TXEN/DOUT pin, Cload = 15pF

10

µs

DOUT and TXEN, Output Current

Source at 0.8 VDD

Sink at 0.2 VDD

3

10

mA

Notes:

1. Exceeding the absolute maximum rating may damage the device

2. The device is not guaranteed to function outside its operating rating

3. This device is ESD sensitive

4. Timing numbers are for a data rate of 1 kbps. Except where shown, all data timing scales linearly with the data rate.

5. In this context, deglitching refers to the D0-D3 pins’ ability to reject high- or low-going glitches. Deglitching makes it much easier to use low-cost

push-to-make switches which have inherently noisy contacts.

6. Guaranteed by design.