TMS320C51 datasheet(48/87 Pages) TI

48 / 87 page

TMS320C5x, TMS320LC5x

DIGITAL SIGNAL PROCESSORS

SPRS030A – APRIL 1995 – REVISED APRIL 1996

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (’320LC5x only)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

IOH = 300 µA

2.0

VOH

(see Note 4)

IOH = 20 µA

VDD – 0.3‡

VOL

Low-level output voltage

IOL = 2 mA

0.4

VOL

(see Note 4)

IOL = 20 µA

0.3‡

High-impedance output current

BR (with internal pullup)

– 500

IOZ

High im edance out ut current

(VDD = 3.47 V)

All other 3-state outputs

–20

µA

TRST(with internal pulldown)

–10

800

TMS, TCK, TDI pins (with internal pullups)

– 500

Input current (VI = VSS to VDD) X2/CLKIN (oscillator enabled)

–50

µA

( ISS

DD)

X2/CLKIN (oscillator disabled)

–10

All other inputs

–10

fx = 40 MHz,

VDD = 3.47 V

IDD(core)

Supply current, core CPU

fx = 50 MHz,

VDD = 3.47 V

()

fx = 80 MHz,

VDD = 3.47 V

fx = 40 MHz,

VDD = 3.47 V

IDD(pins)

Supply current, pins

fx = 50 MHz,

VDD = 3.47 V

()

fx = 80 MHz,

VDD = 3.47 V

IDD(standby) Supply current, standby

IDLE2, divide-by-two clock mode, clocks

shut off

µA

Input capacitance

Output capacitance

† All typical values are at VDD = 3.3 V, TA = 25°C.

‡ Values derived from characterization data and not tested

NOTE 4: Figure 9 shows the test load circuit and Figure 10 and Figure 11 show the voltage reference levels.

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