Obsolete

Product(s)

- Obsolete

Product(s)

Electrical parameters

STHS4257A, STHS4257A1, STHS4257L, STHS4257L1

12/18

3

Electrical parameters

Over the full operating temperature range, unless otherwise noted. Specifications common

for both STHS4257x (=STHS4257A, STHS4257L) and STHS4257x1 (=STHS4257A1,

STHS4257L1) product families unless otherwise noted.

Table 5.

Electrical parameters

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Maximum Operating Voltage

Input/supply voltage - with respect

–57

V

Signature Range

–1.5

–9.5

V

Classification Range

–12.5

–21

V

UVLO Turn-On Voltage,

STHS4257x1

–34.8 –36.0 –37.2

V

UVLO Turn-On Voltage,

STHS4257x

–37.7 –39.2 –40.2

V

UVLO Turn-Off Voltage

–29.3 –30.5 –31.5

V

Supply Current when on

0.33

0.5

mA

Supply Current During

Classification

(4)

0.12

0.25

0.38

mA

Current Accuracy During

Classification

–12.5V

±3.5

%

Signature Resistance

–1.5V

GND, IEEE 802.3af 2-point

23.25

26.00

k

Ω

Invalid Signature Resistance

–1.5V

2-point measurement (2), (6), (7)

911.8

k

Ω

Signature Disable High Level

Input Voltage

357

V

Signature Disable Low Level

Input Voltage

enables signature (7)

0.45

V

Signature Disable Input

Resistance

100

k

Ω

Power Good Output Low Voltage

0.5

V

good signal going inactive

2.7

3.0

3.3

V

Power Good Leakage Current

(9)

1µA

On-Resistance

0.72

1.0

Ω

(10)

1µA

Input Current Limit, High Level,

STHS4257x1

(normal operation mode)

(11), (12)

0°C

–40°C

340

375

400

mA

330

375

400

mA