SAP51D-A-G1-R datasheet(28/67 Pages) RENESAS

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SAP51 / SAP5S Datasheet

January 28, 2016

5.2.

Thermal Protection

The SAP5 continuously monitors its silicon die temperature. If the temperature rises above approximately 140°C

for more than 2 seconds, the SAP5 will cut off the UOUT output from the internal voltage reference. Thus the

current consumption of the SAP5 will drop down to its operating current (refer to Table 2.2). In order to prevent an

undesired drawing of transmitter current, the transmitter is also disabled if the over-temperature cut off condition

occurs.

After an over-temperature cut-off, if the die temperature has cooled down by 10 to 20°C, the output voltage at

UOUT will be restored and the SAP5 performs an initialization with an additional time delay of 1s.

Table 5.4

Cut-Off Temperature

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNIT

Chip temperature for over-temperature shut down

TCutOff

125

160

°C

5.3.

DC Characteristics – Digital Inputs

The following pins contain digital high-voltage input stages:

Input-only pin:

PFAULT

I/O pins:

P1, P3, D1, D3, DSTBn, PSTBn, LED1 (PSTBn and LED1 are inputs for test purposes only)

3-level I/O pins:

P0, P2, D0, D2 (see table notes

1) and 2) in Table 5.5)

Table 5.5

DC Characteristics of Digital High Voltage Input Pins

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNIT

Voltage range for input “offset_low” level

1), 2)

VOFL

1.0

Voltage range for input “offset_high” level

1), 2)

VOFH

1.6

VUOUT

Voltage range for input “low” level

VIL2

2.5

Voltage range for input “high” level

VIH

3.5

VUOUT

Current range for input “low” level

IIL

VIN = 1V

-12

-3

µA

Current range for input “high” level

IIH

V0 ≥ VU5R

-10

µA

Capacitance at pin DSTBn

CDL

The P0, P2, D0, D2 pins are used as 3-level inputs, i.e. inputs with offset detection, in Safety Mode only; otherwise configuration

depends on the slave profile. Refer to Table 5.15.

The 3-level input pads contain independent comparators for the detection of regular input data level and offset. Refer to Figure 5.8

for constraints to the externally applied voltages in Safety Mode.

The pull-up current is driven by a current source connected to U5R. It stays almost constant for input voltages ranging from 0 to

3.8V.

The internal pull-up current is sufficient to avoid accidental triggering of an SAP5 reset if the DSTBn pin remains unconnected. For

external loads at DSTBn, a sufficient pull-up resistor is required to ensure VIH ≥ 3.5V in less than 90ms after the beginning of a

DSTBn = low pulse.

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