PCF1172C View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
PCF1172C Datasheet PDF : 16 Pages
| |||
Philips Semiconductors
31/2-digit LCD car clock
Product specification
PCF1172C
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
3
external regulation
3
internal regulation
IREG = 1 mA
4
IREG
regulation current with
0.2
internal regulation
IDD
current consumption
all switches open; without LCD; 50
internal regulation
disconnected; note 1
ro
differential internal impedance IREG = 1 mA
−
Oscillator (pins 1 and 2; note 2)
tosc
start time
−
∆f/fosc
frequency stability
∆VDD = 100 mV
−
Rfb
feedback resistance
0.1
Ci
input capacitance
−
Co
output capacitance
19
Switches S1, S2 and S3 (pins 18, 3 and 4)
Ii
input current
td
debounce time
RS
segment driver output
resistance
with inputs connected to VSS 50
32
IL = ±50 µA
−
RBP
backplane driver output
IL = ±250 µA
−
resistance
fBP
backplane driver output
−
frequency
Voffset(DC) LCD DC offset voltage
RL = 200 kΩ; CL = 1 nF
−
−
6
V
−
6
V
5
6
V
−
5
mA
400
700
µA
−
150
Ω
−
200
ms
0.2 × 10−6 1 × 10−6
−
1
MΩ
−
9
pF
24
29
pF
150
500
µA
−
150
ms
1
2.5
kΩ
0.2
0.5
kΩ
64
−
Hz
−
±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
Share Link: 