PCF1178CT View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
PCF1178CT Datasheet PDF : 20 Pages
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Philips Semiconductors
4-digit duplex LCD car clock
Product specification
PCF1178C
CHARACTERISTICS
VDD = 3 to 6 V; VSS = 0 V; Tamb = −40 to +85 °C; crystal: f = 4.194304 MHz; Rs = 50 Ω; CL = 12 pF; maximum
frequency tolerance = ±30 × 10−6; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP.
MAX. UNIT
Supply
VDD
∆VDD
TC
IDD
CEXT
supply voltage
supply voltage variation
voltage regulator programmed 3
to 4.5 V at Tamb = 25 °C
S1 or S2 closed
−
supply voltage variation due
−
to temperature
VDD = 4.5 V
−
supply current
note 1
700
capacitance
external capacitor
47
Oscillator
tosc
start time
−
∆f/f
frequency deviation
nominal n = 0
0
∆f/f
frequency stability
∆VDD = 100 mV
−
Rfb
feedback resistance
300
Ci
input capacitance
−
Co
output capacitance
−
Inputs
RO
pull-up resistance
S1, S2, TS, SEL and DATA
45
RO
pull-up/pull-down resistance MODE
100
IIL
leakage current
ENABLE, FLASH
−
td
debounce time
S1 and S2 only
30
VPP programming voltage
IO2
output current
VPP = VDD − 5 V
70
during programming
−
−
6
−
50
−0.35
−
−16
−
950
−
−
−
V
mV
%/K
mV/K
µA
µF
−
60 × 10−6
−
1 000
16
27
200
ms
110 × 10−6
1 × 10−6
3 000
kΩ
−
pF
−
pF
90
180
kΩ
300
1 000
kΩ
−
2
µA
65
100
ms
−
700
µA
500
−
µA
Backplane (high and low levels)
RBP
output resistance
Segment
RSEG
output resistance
LCD
Voffset(DC) DC offset voltage
±100 µA
±100 µA
200 kΩ/1 nF
−
−
−
−
−
−
3
kΩ
5
kΩ
50
mV
Note
1. A suitable resistor (R) must be selected (example):
a) VDD = 5 V; R max. (12 V − 5 V)/700 µA = 10 kΩ.
b) VDD = 5 V; R typ. (12 V − 5 V)/900 µA = 7.8 kΩ (more reserve).
c) IDD must not exceed 3 mA.
1997 Apr 16
10
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