ARM IM-AD1 Bedienungsanleitung PDF herunterladen (Seite 29)

Product data sheet Rev. 5 — 12 August 2011 29 of 45

NXP Semiconductors

LPC2141/42/44/46/48

Single-chip 16-bit/32-bit microcontrollers

[1] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply voltages.

[2] Core and external rail.

[3] The RTC typically fails when V

i(VBAT)

drops below 1.6 V.

[4] Including voltage on outputs in 3-state mode.

[5] V

supply voltages must be present.

[6] 3-state outputs go into 3-state mode when V

is grounded.

[7] Please also see the errata note mentioned in errata sheet.

[8] Accounts for 100 mV voltage drop in all supply lines.

[9] Allowed as long as the current limit does not exceed the maximum current allowed by the device.

[10] Minimum condition for V

= 4.5 V, maximum condition for V

=5.5V.

[11] Applies to P1.16 to P1.31.

[12] On pin VBAT.

[13] Optimized for low battery consumption.

[14] To V

[15] Includes external resistors of 33  ± 1 % on D+ and D.

o(XTAL2)

output voltage on pin

XTAL2

0.5 1.8 1.95 V

i(RTCX1)

input voltage on pin

RTCX1

0.5 1.8 1.95 V

o(RTCX2)

output voltage on pin

RTCX2

0.5 1.8 1.95 V

USB pins

OFF-state output

current

0V<V

<3.3V - - 10 A

BUS

line input voltage

on the USB connector

--5.25V

differential input

sensitivity

|(D+)  (D)| 0.2--V

differential

common-mode range

includes V

range 0.8 - 2.5 V

th(rs)se

single-ended receiver

switching threshold

voltage

0.8 - 2.0 V

LOW output level R

of 1.5 k to 3.6 V - - 0.3 V

HIGH output level R

of 15 k to GND 2.8 - 3.6 V

trans

transceiver capacitance pin to GND - - 20 pF

DRV

driver output impedance

for driver which is not

high-speed capable

steady state drive

[15]

29 - 44 

pull-up resistance SoftConnect = ON 1.1 - 1.9 k

Table 5. Static characteristics

…continued

amb





C to +85



C for commercial applications, unless otherwise specified.

Symbol Parameter Conditions Min Typ

[1]

Max Unit

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 44 45

LPC2141/42/44/46/48 1

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