ELECTRICAL SPECIFICATIONS

Copyright Semtech 1997-2001

DOC5-SPI-DS-117

www.semtech.com

17

Absolute Maximum Ratings

Ratings

Symbol

Value

Unit

Supply Voltage

Vdd

-0.3 to +7.0

V

Input Voltage

Vin

Vss -0.3 to Vdd +0.3

V

Current Drain per Pin

I

25

mA

(not including Vss or Vdd)

Operating Temperature

Ta

T low to T high

° C

UR5HCSPI

-40 to +85

Storage Temperature Range

Tstg -

-65 to +150

° C

Thermal Characteristics

Characteristic

Symbol

Value

Unit

Thermal Resistance

Tja

°C per W

Plastic

60

PLCC

70

DC Electrical Characteristics (Vdd=3.3 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted)

Characteristic

Symbol

Min

Typ

Max

Unit

Output Voltage (I load<10µA)

Vol

0.1

V

Voh

Vdd–0.1

Output High Voltage (I load=0.8mA)

Voh

Vdd–0.8

V

Output Low Voltage (I load=1.6mA)

Vol:

0.4

V

Input High Voltage

Vih

0.7xVdd

Vdd

V

Input Low Voltage

Vil

Vss

0.2xVdd

V

User Mode Current

Ipp

5

10

mA

Data Retention Mode (0 to 70°C)

Vrm

2.0

V

Supply Current (Run)

Idd

1.53

3.0

mA

(Wait)

0.711

1.0

mA

(Stop)

2.0

20

µA

I/O Ports Hi-Z Leakage Current

Iil

+/-10

µA

Input Current

Iin

+/- 1

µA

I/O Port Capacitance

Cio

8

12

pF

Control Timing (Vdd=3.3 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted)

Characteristic

Symbol

Min

Max

Unit

Frequency of Operation

fosc

MHz

Crystal Option

2.0

External Clock Option

dc

2.0

Cycle Time

tcyc

1000

ns

Crystal Oscillator Startup Time

toxov

100

ms

Stop Recovery Startup Time

tilch

100

ms

RESET Pulse Width

trl

8

tcyc

Interrupt Pulse Width Low

tlih

250

ns

Interrupt Pulse Period

tilil

*

tcyc

OSC1 Pulse Width

toh, tol

200

ns

*The minimum period tlil should not be less than the number of cycle times it takes to execute the interrupt service routine plus 21 tcyc.