ST10F271Z1 datasheet(135/185 Pages) STMICROELECTRONICS

135 / 185 page

ST10F271Z1

Electrical characteristics

135/185

Based on thermal characteristics of the package and with reference to the power

consumption figures provided in next tables and diagrams, the following product

classification can be proposed. Anyhow, the exact power consumption of the device inside

the application must be computed according to different working conditions, thermal profiles,

real thermal resistance of the system (including printed circuit board or other substrata), I/O

activity, and so on.

25.4

Parameter interpretation

The parameters listed in the following tables represent the characteristics of the

ST10F271Z1 and its demands on the system.

Where the ST10F271Z1 logic provides signals with their respective timing characteristics,

the symbol “CC” for Controller Characteristics, is included in the “Symbol” column. Where

the external system must provide signals with their respective timing characteristics to the

ST10F271Z1, the symbol “SR” for System Requirement, is included in the “Symbol” column.

25.5

DC characteristics

VDD = 5 V ± 10%, VSS = 0 V, TA = –40 to +125 °C

Table 62.

Thermal characteristics

Symbol

Description

Value (typical)

Unit

ΘJA

Thermal Resistance Junction-Ambient

PQFP 144 - 28 x 28 x 3.4 mm / 0.65 mm pitch

LQFP 144 - 20 x 20 mm / 0.5 mm pitch

LQFP 144 - 20 x 20 mm / 0.5 mm pitch on four layer

FR4 board (2 layers signals / 2 layers power)

°C/W

Table 63.

Package characteristics

Package

Ambient temperature range

CPU frequency range

PQFP 144

–40 / +125 °C1 – 64 MHz

LQFP 144

–40 / +125 °C1 – 40 MHz

Table 64.

DC characteristics

Parameter

Symbol

Limit values

Unit

Test condition

min.

max.

Input low voltage (TTL mode)

(except RSTIN, EA, NMI, RPD, XTAL1,

READY)

VIL

– 0.3

0.8

–

Input low voltage (CMOS mode)

(except RSTIN, EA, NMI, RPD, XTAL1,

READY)

VILS SR

– 0.3

0.3 VDD

V–

Input low voltage RSTIN, EA, NMI, RPD

VIL1 SR

– 0.3

0.3 VDD

V–

Input low voltage XTAL1 (CMOS only)

VIL2 SR

– 0.3

0.3 VDD

Direct Drive mode

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