3

UCC5621

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Output Section (Termination Lines)

Termination Impedance

(Note 3)

104.5

110

115.5

Ω

Output High Voltage

(Note 1)

2.6

2.8

3.0

V

Max Output Current

-22.1 -23.3

-24

mA

-20.7 -23.3

-24

mA

-21

-23

-24

mA

-20

-23

-24

mA

-22.4

mA

Output Leakage

DISCNCT1 = DISCNCT2 = 0V, TRMPWR = 0V to 5.25V

10

400

nA

Output Capacitance

DISCNCT1 = DISCNCT2 = 0V (Note 2)

2.5

4

pF

Regulator Section

Regulator Output Voltage

2.6

2.8

3.0

V

Drop Out Voltage

All Termination Lines = 0.2V

0.4

0.8

V

Short Circuit Current

-650

-900 –1300

mA

Sinking Current Capability

300

500

900

mA

Thermal Shutdown

170

°C

Thermal Shutdown Hysteresis

10

°C

Disconnect Section

Disconnect Threshold DISCNCT1

Controls Lines 10 to 27

0.8

1.5

2.0

V

Input Current DISCNCT1

DISCNCT1 = 0V

–10

–30

µA

Disconnect Threshold DISCNCT2

Controls Lines 1 to 9

0.8

1.5

2

V

Input Current DISCNCT2

DISCNCT2 = 0V

–10

–30

µA

Note 1: Measuring each termination line while other 26 are low (0.2V).

Note 2: Guaranteed by design. Not 100% tested in production.

Z VN L

V

Iat

V

OUT

OUT

=

−

..

.

.

02

02

DISCNCT1: Disconnect one controls termination lines

L10 – L27. Taking this pin low causes termination lines

L10 – L27 to become high impedence, taking this pin

high or leaving it open allows the channels to provide

normal termination.

DISCNCT2 : Disconnect two controls termination lines

L1 – L9. Taking this pin low causes termination lines L1 –

L9 to become high impedence. Taking this pin high or

leaving it open allows the channels to provide normal ter-

miniation. Taking both disconnect pins low will put the

chip in to sleep mode where it will be in low-power mode.

GND: Ground reference for the IC.

L1 - L27: 110

Ω termination channels.

REG: Output of the internal 2.7V regulator.

TRMPWR: Power for the IC.

PIN DESCRIPTIONS