SN54GTL16612WD datasheet(4/13 Pages) TI

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Absolute Maximum Ratings

(1)

Recommended Operating Conditions

(1) (2) (3) (4)

SN54GTL16612, SN74GTL16612

18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS

SCBS480K – JUNE 1994 – REVISED JULY 2005

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

3.3 V

–0.5

4.6

VCC

Supply voltage range

5 V

–0.5

A-port and control inputs

–0.5

Input voltage range(2)

B port and VREF

–0.5

4.6

A port

–0.5

Voltage range applied to any output in the high or power-off state(2)

B port

–0.5

4.6

A port

128

Current into any output in the low state

B port

Current into any A-port output in the high state(3)

Continuous current through each VCC or GND

±100

IIK

Input clamp current

VI < 0

–50

IOK

Output clamp current

VO < 0

–50

DGG package

Package thermal impedance(4)

°C/W

DL package

Tstg

Storage temperature range

–65

150

°C

(1)

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.

(2)

The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

(3)

This current flows only when the output is in the high state and VO > VCC.

(4)

The package thermal impedance is calculated in accordance with JESD 51-7.

SN54GTL16612

SN74GTL16612

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

3.3 V

3.15

3.3

3.45

3.15

3.3

3.45

VCC

Supply voltage

5 V

4.75

5.25

4.75

5.25

GTL

1.14

1.2

1.26

1.14

1.2

1.26

Termination

VTT

voltage

GTL+

1.35

1.5

1.65

1.35

1.5

1.65

GTL

0.74

0.8

0.87

0.74

0.8

0.87

VREF

Reference voltage

GTL+

0.87

1.1

0.87

1.1

B port

VTT

Input voltage

Except B port

5.5

B port

VREF + 50 mV

High-level

VIH

input voltage

Except B port

B port

VREF – 50 mV

Low-level

VIL

input voltage

Except B port

0.8

IIK

Input clamp current

–18

High-level

IOH

A port

–32

output current

A port

Low-level

IOL

output current

B port

Operating free-air temperature

–55

125

–40

°C

(1)

All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

(2)

Normal connection sequence is GND first, VCC = 5 V second, and VCC = 3.3 V, I/O, control inputs, VTT and VREF (any order) last.

(3)

VTT and RTT can be adjusted to accommodate backplane impedances if the dc recommended IOL ratings are not exceeded.

(4)

VREF can be adjusted to optimize noise margins, but normally is two-thirds VTT.

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