PCF1171C View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
PCF1171C Datasheet PDF : 16 Pages
| |||
Philips Semiconductors
4-digit LCD car clock
Product specification
PCF1171C
CHARACTERISTICS
VDD = 5 V; VSS = 0 V; Tamb = −40 to +85 °C; crystal: f = 4.194304 MHz; Rs = 50 Ω; CL = 12 pF; unless otherwise
specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP.
MAX. UNIT
Supply
VDD
supply voltage
external regulation
internal regulation
IREG
regulation current with
internal regulation
IREG = 1 mA
3
−
6
V
4
5
6
V
0.2 −
5
mA
IDD
current consumption
all switches open; without LCD; 50
400
700
µA
internal regulation
disconnected; note 1
ro
differential internal impedance IREG = 1 mA
−
−
150
Ω
Oscillator (pins 1 and 2) (see note 2)
tosc
∆f/fosc
Rfb
Ci
Co
start time
frequency stability
feedback resistance
input capacitance
output capacitance
∆VDD = 100 mV
−
−
200
ms
−
0.2 × 10−6 1 × 10−6
0.1 −
1
MΩ
−
−
9
pF
19
24
29
pF
Switches S1, S2 and S3 (pins 18, 3 and 4) and test inputs, TS, TR (pins 38 and 39)
Ii
input current
td
debounce time
RS
segment driver output
resistance
with inputs connected to VSS 50
150
500
µA
32
−
150
ms
IL = ±50 µA
−
1
2.5
kΩ
RBP
backplane driver output
resistance
IL = ±250 µA
−
0.2
0.5
kΩ
fBP
backplane driver output
frequency
−
64
−
Hz
Voffset(DC) LCD DC offset voltage
RL = 200 kΩ; CL = 1 nF
−
−
±50
mV
Notes
1. The current IEXT = IREG + IDD + 2 × Ii (+ LCD current).
2. For correct operation of the oscillator: VDD ≥ 3 V.
1997 Apr 16
6
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