Datasheet

LPC2131_32_34_36_38 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 5.1 — 29 July 2011 28 of 45
NXP Semiconductors
LPC2131/32/34/36/38
Single-chip 16/32-bit microcontrollers
[1] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply voltages.
[2] The RTC typically fails when V
i(VBAT)
drops below 1.6 V.
[3] Including voltage on outputs in 3-state mode.
I
BATpd
Power-down mode battery
supply current
RTC clock = 32 kHz
(from RTCXn pins);
T
amb
=25C
V
DD
= 3.0 V; V
i(VBAT)
=2.5V
[11]
-14-A
V
DD
= 3.0 V; V
i(VBAT)
=3.0V - 16 - A
V
DD
= 3.3 V; V
i(VBAT)
=3.3V - 18 - A
V
DD
= 3.6 V; V
i(VBAT)
=3.6V - 20 - A
I
BATact
active mode battery
supply current
CCLK = 60 MHz;
PCLK = 15 MHz;
PCLK enabled to RTCK;
RTC clock = 32 kHz
(from RTCXn pins);
T
amb
=25C
V
DD
= 3.0 V; V
i(VBAT)
=3.0V
[11]
-78-A
V
DD
= 3.3 V; V
i(VBAT)
=3.3V - 80 - A
V
DD
= 3.6 V; V
i(VBAT)
=3.6V - 82 - A
I
BATact(opt)
optimized active mode
battery supply current
PCLK disabled to RTCK in the
PCONP register;
RTC clock = 32 kHz
(from RTCXn pins);
T
amb
=25C; V
i(VBAT)
=3.3V
CCLK = 6 MHz
[11][12]
-21-A
CCLK = 25 MHz - 23 - A
CCLK = 50 MHz - 27 - A
CCLK = 60 MHz - 30 - A
I
2
C-bus pins
V
IH
HIGH-level input voltage 0.7V
DD
--V
V
IL
LOW-level input voltage - - 0.3V
DD
V
V
hys
hysteresis voltage - 0.05V
DD
-V
V
OL
LOW-level output voltage I
OLS
=3 mA
[7]
--0.4V
I
LI
input leakage current V
I
=V
DD
[13]
-24A
V
I
=5V
[13]
-1022A
Oscillator pins
V
i(XTAL1)
input voltage on pin
XTAL1
0.5 1.8 1.95 V
V
o(XTAL2)
output voltage on pin
XTAL2
0.5 1.8 1.95 V
V
i(RTCX1)
input voltage on pin
RTCX1
0.5 1.8 1.95 V
V
o(RTCX2)
output voltage on pin
RTCX2
0.5 1.8 1.95 V
Table 6. Static characteristics
…continued
T
amb
=  40  C to +85  C for commercial applications, unless otherwise specified.
Symbol Parameter Conditions Min Typ
[1]
Max Unit