TL16C554FN datasheet(6/33 Pages) TI

6 / 33 page

TL16C554, TL16C554I

ASYNCHRONOUS COMMUNICATIONS ELEMENT

SLLS165D – JANUARY 1994 – REVISED JULY 1998

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5.25

Clock high-level input voltage at XTAL1, VIH(CLK)

VCC

Clock low-level input voltage at XTAL1, VIL(CLK)

– 0.5

0.8

High-level input voltage, VIH

VCC

Low-level input voltage, VIL

– 0.5

0.8

Clock frequency, fclock

MHz

Operating free-air temperature TA

TL16C554

°C

O erating free-air tem erature, TA

TL16C554I

–40

°C

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

voltage (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH‡

High-level output voltage

IOH = – 1 mA

2.4

VOL‡

Low-level output voltage

IOL = 1.6 mA

0.4

IIkg

Input leakage current

VCC = 5.25 V,

GND = 0,

VI = 0 to 5.25 V,

All other terminals floating

±10

µA

IOZ

High-impedance output

current

VCC = 5.25 V,

GND = 0,

VO = 0 to 5.25 V,

Chip selected in write mode or chip deselected

±20

µA

ICC

Supply current

VCC = 5.25 V,

TA = 25°C,

RX, DSR, DCD, CTS, and RI at 2 V,

All other inputs at 0.8 V, XTAL1 at 4 MHz,

No load on outputs,

Baud rate = 50 kilobits per second

Ci(XTAL1)

Clock input capacitance

Co(XTAL2) Clock output capacitance

VCC = 0,

VSS = 0,

All other terminals grounded

f=1MHz

Input capacitance

All other terminals grounded,

f = 1 MHz,

TA = 25°C

Output capacitance

TA 25 C

† All typical values are at VCC = 5 V, TA = 25°C.

‡ These parameters apply for all outputs except XTAL2.

clock timing requirements over recommended ranges of operating free-air temperature and supply

voltage (see Figure 1)

MIN

MAX

UNIT

tw1

Pulse duration, clock high (external clock)

tw2

Pulse duration, clock low (external clock)

tw3

Pulse duration, RESET

1000

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