Philips Semiconductors
Matchbox global FM tuner
BUS TIMING
Preliminary specification
OM5610
handbook, full pagewidth
WREN
VIH
CLCK
VIL
DATA
tHIGH tLOW
tda
Fig.4 Bus timing.
MBH890
Table 6 Digital inputs
SYMBOL
PARAMETER
Digital inputs
VIH
HIGH level input voltage
VIL
LOW level input voltage
Timing
fclk
tHIGH
tLOW
tda
clock frequency
clock HIGH time
clock LOW time
shift register available after ‘search ready’
MIN.
MAX.
UNIT
1.4
−
V
−
0.6
V
−
300
kHz
1.67
−
µs
1.67
−
µs
−
14
µs
INTERFACE
• Digital driving: 3-wire bus
• Audio output: typical 160 mV RMS for ∆f = 75 kHz (unloaded; Zo = 5 kΩ)
• Supply voltages:
– Pin 7: 5 V ±10% current ≤25 mA
– Pin 8: 9 to 12 V, current ≤2 mA, ripple ≤1 V
• MPX-RDS: DC coupled (load ≥39 kΩ), amplitude typical 150 mV (∆f = 75 kHz)
• RF input connector: 2-pin connector, to be driven from a 75 Ω source
• 12 pin connector.
1997 Apr 25
7