SN74VMEH22501A

8BIT UNIVERSAL BUS TRANSCEIVER AND TWO 1BIT BUS TRANSCEIVERS

WITH SPLIT LVTTL PORT, FEEDBACK PATH, AND 3STATE OUTPUTS

SCES620 – DECEMBER 2004

6

POST OFFICE BOX 655303

−0.5 V to 4.6 V

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

−0.5 V to 7 V

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

Voltage range applied to any output in the high-impedance

−0.5 V to 7 V

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

(see Note 1): 3A port or Y output

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

B port

−0.5 V to 4.6 V

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

50 mA

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

B port

100 mA

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

−50 mA

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

B port

−100 mA

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

−50 mA

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

−50 mA

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

Package thermal impedance,

70

°C/W

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

DGV package

58

°C/W

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

GQL package

42

°C/W

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

−65

°C to 150°C

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

† 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.

NOTES:

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

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

recommended operating conditions (see Notes 3 and 4)

MIN

TYP

MAX

UNIT

VCC,

BIAS VCC

Supply voltage

3.15

3.3

3.45

V

VI

Input voltage

Control inputs or A port

VCC

5.5

V

VI

Input voltage

B port

VCC

5.5

V

VIH

High-level input voltage

Control inputs or A port

2

V

VIH

High-level input voltage

B port

0.5 VCC + 50 mV

V

VIL

Low-level input voltage

Control inputs or A port

0.8

V

VIL

Low-level input voltage

B port

0.5 VCC − 50 mV

V

IIK

Input clamp current

−18

mA

IOH

High-level output current

3A port and Y output

−12

mA

IOH

High-level output current

B port

−48

mA

IOL

Low-level output current

3A port and Y output

12

mA

IOL

Low-level output current

B port

64

mA

∆t/∆v

Input transition rise or fall rate

Outputs enabled

10

ns/V

∆t/∆VCC

Power-up ramp rate

20

µs/V

TA

Operating free-air temperature

−40

85

°C

NOTES:

3. All unused control 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.

4. Proper connection sequence for use of the B-port I/O precharge feature is GND and BIAS VCC = 3.3 V first, I/O second, and

VCC = 3.3 V last, because the BIAS VCC precharge circuitry is disabled when any VCC pin is connected. The control inputs can be

connected anytime, but normally are connected during the I/O stage. If B-port precharge is not required, any connection sequence

is acceptable, but generally, GND is connected first.