TL16C451, TL16C452

ASYNCHRONOUS COMMUNICATIONS ELEMENTS

SLLS053C – MAY 1989 – REVISED AUGUST 1999

7

POST OFFICE BOX 655303

– 0.5 V to 7 V

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– 0.5 V to 7 V

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– 0.5 V to 7 V

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Continuous total power dissipation

1100 mW

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

260

°C

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† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to GND.

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5

5.25

V

High-level Input voltage, VIH

2

VCC

V

Low-level Input voltage, VIL

– 0.5

0.8

V

Operating free-air temperature, TA

0

70

°C

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

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

IOH = – 0.4 mA on DB0 – DB7

VOH

High level output voltage

IOH = – 2 mA to 4 mA on PD0 – PD7

24

V

VOH

High-level output voltage

IOH = – 0.2 mA on INIT,

AFD, STB, and SLIN

2.4

V

IOH = – 0.2 mA on all other outputs

IOL = 4 mA on DB0 – DB7

IOL = 12 mA on PD0 – PD7

VOL

Low-level output voltage

IOL = 10 mA on INIT,

AFD, STB, and SLIN (see Note 2)

0.4

V

IOL = 2 mA on all other outputs

IIk

Input leakage current

VCC = 5.25 V,

VSS = 0,

±10

µA

IIkg

Input leakage current

CC

,

SS

,

VI = 0 to 5.25 V,

All other terminals floating

±10

µA

Ioz

High-impedance output current

VCC = 5.25 V,

VSS = 0,

VO = 0 to 5.25 V,

Chip selected and in write mode, or chip deselected

±20

µA

VCC = 5.25 V,

VSS = 0,

SS

S

CS

ICC

Supply current

SIN, DSR, RLSD, CTS, and RI at 2 V,

All other inputs at 0 8 V

XTAL1 at 4 MHz

10

mA

All other in uts at 0.8 V,

XTAL1 at 4 MHz,

No load on outputs,

Baud rate = 50 kbit/s

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

NOTE 2: INIT, AFD, STB, and SLIN are open-collector output terminals that each have an internal pullup to VCC. This generates a maximum of

2 mA of internal IOL per terminal. In addition to this internal current, each terminal sinks at least 10 mA while maintaining the VOL

specification of 0.4 V maximum.

system timing requirements over recommended ranges of supply voltage and operating free-air

temperature

PARAMETER

FIGURE

MIN

MAX

UNIT

tcR

Cycle time, read (tw7 + td8 + td9)

175

ns