TL16C554, TL16C554I

ASYNCHRONOUS COMMUNICATIONS ELEMENT

SLLS165D – JANUARY 1994 – REVISED JULY 1998

6

POST OFFICE BOX 655303

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5

5.25

V

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

2

VCC

V

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

– 0.5

0.8

V

High-level input voltage, VIH

2

VCC

V

Low-level input voltage, VIL

– 0.5

0.8

V

Clock frequency, fclock

16

MHz

Operating free-air temperature TA

TL16C554

0

70

°C

O erating free-air tem erature, TA

TL16C554I

–40

85

°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

V

VOL‡

Low-level output voltage

IOL = 1.6 mA

0.4

V

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

50

mA

Ci(XTAL1)

Clock input capacitance

15

20

pF

Co(XTAL2) Clock output capacitance

VCC = 0,

VSS = 0,

All other terminals grounded

f=1MHz

20

30

pF

Ci

Input capacitance

All other terminals grounded,

f = 1 MHz,

TA = 25°C

6

10

pF

Co

Output capacitance

TA 25 C

10

20

pF

† 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)

31

ns

tw2

Pulse duration, clock low (external clock)

31

ns

tw3

Pulse duration, RESET

1000

ns