PCF2127 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF2127' PDF : 101 Pages View PDF
NXP Semiconductors
PCF2127
Accurate RTC with integrated quartz crystal for industrial applications
Table 90. Static characteristics …continued
VDD = 1.8 V to 4.2 V; VSS = 0 V; Tamb = 40 C to +85 C, unless otherwise specified.
Symbol Parameter
Conditions
Min
Power management
Vth(sw)bat battery switch
-
threshold voltage
Vth(bat)low
Vth(PFI)
low battery threshold
voltage
threshold voltage on
pin PFI
Tamb = 25 C
-
2.25
-
Inputs[4]
VI
input voltage
VIL
LOW-level input
voltage
Tamb = 20 C to +85 C;
VDD > 2.0 V
VIH
HIGH-level input
voltage
0.5
-
-
0.7VDD
ILI
input leakage current VI = VDD or VSS
-
post ESD event
1
Ci
input capacitance
[5] -
Outputs
VO
output voltage
on pins CLKOUT, INT, RST and
0.5
PFO, referring to external pull-up
on pin BBS
1.8
on pin SDO
0.5
VOH
HIGH output voltage on pin SDO
VOL
LOW output voltage on pins CLKOUT, INT, RST,
SDO, and PFO
0.8VDD
VSS
IOL
LOW-level output
output sink current;
current
VOL = 0.4 V
on pin SDA/CE
[6] 3
on all other outputs
1.0
IOH
HIGH-level output
output source current;
1.0
current
on pin SDO;
VOH = 3.8 V;
VDD = 4.2 V
ILO
output leakage current VO = VDD or VSS
-
post ESD event
1
Typ
2.5
2.5
-
1.25
-
-
-
-
0
-
-
-
-
-
-
-
17
-
-
0
-
Max
Unit
-
V
-
V
2.85
V
-
V
VDD + 0.5 V
0.25VDD V
0.3VDD
V
-
V
-
A
+1
A
7
pF
5.5
V
4.2
V
VDD + 0.5 V
VDD
V
0.2VDD
V
-
mA
-
mA
-
mA
-
A
+1
A
[1] For reliable oscillator start-up at power-on: VDD(po)min = VDD(min) + 0.3 V.
[2] Timer source clock = 1⁄60 Hz, level of pins SDA/CE, SDI, and SCL is VDD or VSS.
[3] When the device is supplied by the VBAT pin instead of the VDD pin, the current values for IBAT are as specified for IDD under the same
conditions.
[4] The I2C-bus and SPI-bus interfaces of PCF2127 are 5 V tolerant.
[5] Tested on sample basis.
[6] For further information, see Figure 49.
PCF2127
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 19 December 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
74 of 100
Share Link: 
