BU TUNERS
DATA SHEET
FM1236
Desktop video & FM radio module
system M, N
Preliminary specification
File under BU Tuners, DC03
1997 Feb 03
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
FEATURES
• System M and N, and FM radio broadcast
• True 5 V device (low power dissipation)
• Full frequency range from channel 2
(55.25 MHz) to channel 69 (801.25 MHz)
• FM band coverage from 76.0 MHz to 108.0 MHz
the PLL tuning IC, so that the AFC status can be read via
the I2C-bus.
• PLL controlled tuning
• Programmable PLL step size (31.25, 50 or 62.5 kHz)
In the FM radio mode, the level detector and AFT functions
are provide for the auto-search routines. The level detector
and AFT status can be read from the A/D bits in the
status-byte. The mute function is also provided to
suppress the audio output signal, if required.
• True-synchronous vision IF demodulator (PLL)
• Ultra linear FM PLL demodulator for FM broadcast
• Demodulated video output, AF sound output, second
sound IF output
• I2C-bus control of tuning, address selection, AFC status
information
The tuner AGC for both TV and FM radio operation, is
generated with a novel AGC detector which measures the
IF signal level directly at the tuner IF output terminals. As
opposed to the conventional AGC detector, this new circuit
allows a higher take-over level and offers superior
immunity against tuner overload.
• Complies with FCC, DOC and JIS regulations on
radiation
• Small horizontally mounted metal housing.
The demodulation of the TV sound (4.5 MHz) and FM IF
(10.70 MHz) is done with a PLL demodulation circuit
contained in the IF IC. In the FM radio mode, the
multiplexed AF signal is then channelled to a stereo
decoder IC which extracts the left/right analog signals. The
multiplexed audio signal is also available at pin 25 to
support RDS or BTSC implementations. The 2nd IF sound
output is provided to connect external (analog 2 carrier or
digital) stereo processing.
DESCRIPTION
The FM1236 front-end is designed to receive both TV and
FM stereo signals in the PC Multimedia environment. The
units are available with separate 75 Ω inputs for TV and
FM broadcast reception. The input connectors available
are either standard phono or F type. The tuning,
bandswitching and antenna selection are made through
the I2C bus.
The front-end covers the TV bands from 55.25 MHz to
801.25 MHz, inclusive of the Japanese TV bands from
91.25 MHz to 765.25 MHz. The FM band covers the
standard 87.50 MHz to 108.00 MHz and also the
Japanese FM band (76.00 MHz to 91.00 MHz). An RDS
decoder can be connected to the AF-MPX output. The
FM1236 meets the input immunity and radiation
requirements of the FCC, DOC and JIS.
ORDERING INFORMATION
TYPE
The FM1236 consists of a TV tuner, an FM radio tuner and
an IF section, all designed on a single PCB. The front-end
is assembled in a metal housing made of a rectangular
tin-plated steel frame, with front and rear covers, which
have soldered contacts to the frame. The two phono or
F antenna connectors (female) are mounted on one side
of the frame for the TV/FM signal inputs. All other
connections are made via pins at the bottom.
CATALOGUE
NUMBERS
FM1236/HM/PH
standard phono
3139 147 13411
FM1236/HM/F
F
3139 147 13421
MARKING
The following items of information are printed on a sticker
that is on the top cover of the tuner:
• Type number
• Code number
• Origin letter of factory
• Change code
The TV IF section uses an intercarrier SAW filter, followed
by a true-synchronous vision IF demodulator (PLL) IC. The
analog AFC voltage is fed to the 5-level A/D converter in
1997 Feb 03
DESCRIPTION
• Year and week code.
2
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
INTERMEDIATE FREQUENCIES
FREQUENCY
(MHz)
SYSTEM
Picture carrier
Colour
Sound
FM
45.75
42.17
41.25
10.70
CHANNEL COVERAGE
OFF-AIR CHANNELS
BAND
CABLE CHANNELS
CHANNEL
FREQUENCY
(MHz)
FM band
Low band
Mid band
−
2 to 6
7 to 13
76.00 to 108.00
55.25 to 83.25
175.25 to 211.25
High band
14 to 69
471.25 to 801.25
CHANNEL
FREQUENCY
(MHz)
−
A-2 to G
H to I
J to ZZ
AAA to BBB (+6 MHz)
−
109.25 to 157.25
163.25 to 169.25
217.25 to 451.25
457.25 to 469.26
PINNING
SYMBOL
PIN
DESCRIPTION
VT
11
tuning voltage (monitor)
VS(tuner)
12
supply voltage tuner section +5 V
SCL
13
I2C-bus serial clock
SDA
14
I2C-bus serial data
AS
15
I2C-bus address select
AF O/P right
20
FM right channel
AF O/P left
21
FM left channel
2nd IF O/P
22
second IF sound output
CVBS
23
Composite Video Baseband Signal (CVBS) output
VS(IF)
24
supply voltage IF section +5 V
AF O/P
25
AF sound output
−
1997 Feb 03
TH1, TH2,
TH3 and
TH4
mounting tags (ground)
3
1997 Feb 03
4
FM
antenna
TV
antenna
CCA505
LOW BAND
MID BAND
HIGH BAND
DC-DC
VT
handbook, full pagewidth
12
13
14 15
AFT
IF
FM-IF
10.7 MHz
FILTER
SAW
AGC
DETECTOR
AF-R AF-L
21
2nd IF
sound
output
22
FM
DEMODULATOR
VIF PLL
DEMODULATOR
STEREO
DECODER
20
VIF
FILTER
10.7 MHz
FILTER
24
25
CVBS +5 V AF
VS(IF) (TV)
23
DISCRIMINATOR
10.7 MHz
TRAP
VCO
2nd IF
Desktop video & FM radio module
system M, N
Fig.1 Electrical block diagram.
VT
+5 V SCL SDA AS
monitor VS( tuner)
11
PLL
LOW
OSC.
MID
OSC.
HIGH
OSC.
MIXER - OSCILLATOR IC
Philips Components
Preliminary specification
FM1236
BLOCK DIAGRAM
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
LIMITING VALUES
Limiting values under operational conditions
The tuner can be guaranteed to function properly under the following conditions.
SYMBOL
PARAMETER
VS
supply voltage
VS(ripple)
peak-to-peak ripple voltage susceptibility
(at 5 V ±5%); note 1:
PIN
12
20 Hz to 100 kHz
>100 kHz to 500 kHz
IS(tuner)
supply current
VSCL
SCL bus input voltage
VSDA
SDA bus input voltage
ISDA
SDA bus current (open collector)
VAS
address select voltage; note 2
VAFright(FM)
FM right channel DC voltage
ZAFright(FM)
FM right channel load impedance parallel
connected:
13
14
15
MIN.
TYP.
MAX.
UNIT
4.75
5.00
5.25
V
−
−
5
mV
−
−
10
mV
−
−
120
mA
−0.3
−
+5.25
V
−0.3
−
+5.25
V
−1
−
+5
mA
−
−
+5.25
V
−
1.0
−
V
20
resistive value
−
40
−
kΩ
capacitive value
−
9
−
pF
−
1.0
−
V
−
40
−
kΩ
−
9
−
pF
0.5
−
−
kΩ
−
75
−
Ω
−
−
100
ns
4.75
5.0
5.25
V
−
−
150
mA
5.0
−
−
kΩ
−
−
4
nF
VAFleft(FM)
FM left channel DC voltage
ZAFleft(FM)
FM left channel load impedance:
21
resistive value
capacitive value
ZIF
2nd
IF sound output load impedance
22
ZCVBS
Composite Video Baseband Signal load
impedance
23
tL
CVBS load time constant
VS(IF)
IF supply voltage
IS(IF)
IF supply current
ZAF
AF sound output load impedance parallel
connected:
24
25
resistive value
capacitive value
Notes
1. Sinusoidal ripple voltage superimposed on the 5 V supply voltage in the frequency range of 20 Hz to 500 kHz.
Criteria for TV interference >57 dB.
2. For detailed information about the address decoding, refer to Chapter “Application information”.
1997 Feb 03
5
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
Environmental conditions
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Non-operational conditions
−25
−
+85
°C
−
−
100
%
−
−
245
m/s2
50 g
−
−
490
m/s2
10 to 55 Hz
−
0.35
−
mm
Tamb
ambient temperature
RH
relative humidity
gB
bump acceleration
25 g
gS
shock acceleration
vibration amplitude
Operational conditions
Tamb
ambient temperature
−10
−
+60
°C
RH
relative humidity
−
−
95
%
OVERALL PERFORMANCE
Conditional data
Unless otherwise specified, all electrical values for Chapter “Overall performance” apply at the following conditions.
SYMBOL
PARAMETER
VALUE
UNIT
Tamb
ambient temperature
25 ±5
°C
RH
relative humidity
60 ±15
%
VS
supply voltage (tuner and IF section)
5 ±0.125
V
ZCVBS
video output load impedance (DC)
75
Ω
ZIF
2nd IF sound output load impedance (DC)
0.5
kΩ
ZAF
AF sound output load impedance
100
kΩ
tpr
pre-heating time (+5 V at pin 24)
10
minute
ZS(AE)
aerial source impedance (asymmetrical)
75
Ω
1997 Feb 03
6
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
TUNER CHARACTERISTICS
For detailed information about the PLL programming, refer to Chapter “Application information”.
The desktop video tuner is guaranteed to function properly within the specified operational conditions, but a certain
deterioration of performance parameters may occur at the limits of the operational conditions.
Required data for test equipment to be used
EQUIPMENT
PARAMETER
DC voltmeter
input impedance
Oscilloscope
input impedance:
VALUE
UNIT
>1
MΩ
resistance
>1
MΩ
capacitance
<15
pF
Spectrum analyzer
input impedance
50
Ω
FET probe
input impedance:
resistance
1
MΩ
capacitance
3.5
pF
output impedance
50
Ω
voltage gain
0
dB
input impedance
>100
kΩ
AC millivoltmeter
1997 Feb 03
7
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
handbook, full pagewidth
FM1236
aerial
connector
TP2
9
TP3
10 11 12 13 14 15
20 21 22 23 24 25
IF
PROBE
OUT
IF
output
5V
VT
VS
BU2
220
nF
22
Ω
220
nF
SCL
+
39
kΩ
SDA
1/
2
TDA1308
240
kΩ
6
−
4
7
+
39
kΩ
5
+
2
−
TEST JIG
3
kΩ
47
kΩ
33
µF
10
nF
1
µF
47
kΩ
8
240
kΩ
1
+
47
µF
22
Ω
220
kΩ
+
3
+
47
µF
1
nF
1/
2
TDA1308
47
µF
22
Ω
220
kΩ
BU7
BU8
BU5
CCA506
P
BU4
BU2
video
out
BU6
+5 V
S1
5
kΩ
15
nF
15 kHz
LOW-PASS
FILTER
(2)
(1)
SA
DA
(1) BU4 loaded with 75 Ω.
(2) 75 µs de-emphasis.
SA = Spectrum Analyzer.
P = FET probe.
DA = Distortion Analyzer.
VAC = dual channel AC voltmeter (Zi = 600 Ω)
The minimum load impedance required at the CVBS output (pin 23) is 75 Ω (both AC and DC).
Fig.2 Typical test set up.
1997 Feb 03
8
DA
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
Definitions of test signals (see Fig.2)
FREQ.
(MHz)
TEST SIGNAL
MODULATION
AMPLITUDE
VIDEO
A0: unmodulated vision
carrier
477.25
60 dBµV
A1: RF M, N standard signal
with video modulation
477.25
60 dBµV
(top sync)
B1: unmodulated sound
carrier M, N system
481.25
−7 dB w.r.t.
A0 to A1
B2: FM modulated sound
carrier M, N system
481.25
−7 dB w.r.t.
A0 to A1
B3: unmodulated sound
carrier M, N system
483.25
−12 dB w.r.t.
A0 to A1
C1: FM modulated sound
carrier
C2: FM modulated sound
carrier
98.00
AUDIO
100% (rest carrier 12.5%)
2T pulse and bar
1 kHz; modulation frequency
deviation ±25 kHz;
75 µs pre-emphasis
60 dBµV
1 kHz; modulation frequency
deviation ±22.5 kHz
97.70 60 dBµV
or 98.30
1 kHz; modulation frequency
deviation ±22.5 kHz
C3: FM modulated sound
carrier
98.00
60 dBµV
1 kHz; modulation frequency
deviation ±75 kHz;
10% pilot carrier (L = R);
75 µs pre-emphasis
Aerial input characteristics
SYMBOL
VSWR
PARAMETER
reflection coefficient
CONDITIONS
Vant
antenna connection disturbance
voltage
1997 Feb 03
UNIT
−
5
−
4
5
−
kV
1 to <54 MHz
−
10
dBµV
54 to <300 MHz
−
34
dBµV
300 to <1000 MHz
−
50
dBµV
FM (centre of channel)
surge protection voltage
MAX.
referred to 75 Ω impedance
(worst case on or between picture
and sound carrier at maximum gain):
all channels in TV mode
VPSM
MIN.
9
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
General characteristics
SYMBOL
fb
∆fb
αi
αIF
ZIF
mx
Vosc
tli
αvs
VESD
1997 Feb 03
PARAMETER
frequency range:
FM band
low band
mid band
high band
margin:
for FM band
for low band
for mid/high band
image rejection (nominal gain to
10 dB gain reduction):
low band (channel 2 to 6)
mid band (channel 7 to 13)
high band (channel 14 to 69)
IF rejection (picture)
1⁄ IF susceptibility:
2
E2 to E13
E14 to E69
cross modulation:
in-channel
in-band
low band (n ±2)
mid band (n ±3)
high band (n ±5)
out of band
breakthrough susceptibility:
channel 2 to 69
oscillator voltage at all pins
oscillators lock-in time
the video signal-to-sound
interference ratio with the tuner
exposed to sound signals in the
audio frequency range
100 Hz to 10 kHz and sound
pressure levels up to 105 dB
(20 µPa)
audio S/N ratio
electrostatic discharge (ESD)
on all pins
CONDITIONS
MIN.
TYP.
MAX.
UNIT
76.00
55.25
163.25
457.25
−
−
−
−
108.00
157.25
451.25
801.25
MHz
MHz
MHz
MHz
3
1.5
3
−
−
−
−
−
−
MHz
MHz
MHz
60
60
45
60
−
−
−
−
−
−
−
−
dB
dB
dB
dB
75
60
−
−
−
−
dBµV
dBµV
65
−
−
dBµV
78
78
84
−
−
−
−
100
−
−
−
−
dBµV
dBµV
dBµV
dBµV
60
−
charge pump set logic HIGH −
40
−
−
−
−
−
70
150
−
dBµV
dBµV
ms
dB
40
2
−
−
−
−
dB
kV
note 1
10
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
SYMBOL
PARAMETER
FM1236
CONDITIONS
MIN.
TYP.
MAX.
UNIT
FM radio characteristics
α26
α50
αi(FM)
limiting sensitivity for (S+N)/N
S/N ratio:
mono at f = 22.5 kHz
mono at f = 75 kHz
stereo
FM image rejection
effective selectivity S300
frequency response:
lower −3 dB point
upper −3 dB point
AM suppression
FM AF output level at
terminal 20/21 (RMS value):
mono
stereo
stereo separation
total harmonic distortion:
stereo at 1 kHz
during overmodulation at
f = ±100 kHz
test signal C1
test signal C3
test signal C1
test signal C3
test signal C1
test signal C1 + C2
test signal C3; −3 dB points
test signal C1
test signal C1
test signal C3
test signal C3; 1 kHz
test signal C3
−
−
5
30
30
40
dBµV
dBµV
55
65
55
53
50
58
68
63
60
−
−
−
−
−
−
dB
dB
dB
dB
dB
−
14
38
20
18
−
40
−
−
Hz
kHz
dB
40
120
28
57
175
35
74
230
−
mV
mV
dB
−
−
0.8
1.5
1.5
3
%
%
Note
1. All the pins of the desktop video tuner are protected against electrostatic discharge (ESD) up to 2 kV. The product is
classified in category B (‘‘MIL-STD-883C”).
1997 Feb 03
11
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
Video and audio characteristics (see Fig.2)
PARAMETER
TEST SIGNAL
TEST
POINT
MIN. TYP. MAX.
UNIT
CVBS characteristics:
video amplitude signal at pin 23
A1 (peak-to-peak value)
BU4
0.75
0.95
1.15
V
DC level sync pulse at pin 23
A1
BU4
−
0.35
−
V
A1
BU4
−1.5
−
+1.0
dB
at 3 MHz
A1
BU4
−2.5
−
+1.5
dB
at 3.58 MHz
A1
BU4
−4.0
−
+2.0
dB
Sound carrier rejection
A1 (1 MHz) + B1
BU4
40
−
−
dB
Residual 47.25 MHz signal in video channel:
level of 1.5 MHz
A1 + B3
BU4
−
−
68
dBµV
Residual 91.5 MHz signal in video channel
A1
BU4
−
−
80
dBµV
Second IF sound output level at level of 4.5 MHz
A1 (black) + B1
BU5
84
−
−
dBµV
2T pulse/bar response
A1
BU4
−2.5
−
+2.5
%
2T pulse response
A1
BU4
−
−
+3.0
%
CVBS S/N (unweighted)
A1 + B1
BU4
41
−
−
dB
Gain limited sensitivity at 1 dB reduction
of video output
A1
BU4
−
−
30
dBµV
Maximum usable single input signal
A1
BU4
90
−
−
dBµV
AF output level measured via LP 200 kHz filter,
RMS detector, 75 µs de-emphasis
A1 + B2
BU6
0.21
0.31
0.41
V
THD (Total Harmonic Distortion) measured
via LP 200 kHz filter, RMS detector,
75 µs de-emphasis
A1 + B2
BU6
−
−
0.5
%
S/N measured via CCIR filter, peak
CCIR detector, 75 µs de-emphasis
A1 (full field colour bar)
+ B1
BU6
38
−
−
dB
AM suppression ratio
A1 (black) + B2
BU6
40
−
−
dB
Aerial input level for S/N = 41 dB
A1 (black) + B2
BU6
−
−
45
dBµV
Video amplitude drop with respect to modulation
1 MHz at Tamb = 45 °C:
at 2 MHz
Test on 2T pulse at Tamb = 45 °C:
Audio characteristics:
Digital AFC status
ADC word at I2C-bus during read operation
DIGITAL
READ-OUT
FREQUENCY
(kHz)
−125
00
01
−62.5
02
0
+62.5
03
+125
04
1997 Feb 03
12
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
APPLICATION INFORMATION
A detailed description of the I2C-bus specification, with applications, is given in brochure ‘‘The I2C-bus and how to
use it’’. This brochure may be ordered using the code number 9398 393 40011.
WRITE mode
BITS
BYTE
Address byte
Program divider byte 1
Program divider byte 2
Control information byte 1
Control information byte 2
7
MSB
6
5
4
3
2
1
0
LSB
A(1)
1
0
n7
1
P7
1
n14
n6
CP
P6
0
n13
n5
T2
P5
0
n12
n4
T1
P4
0
n11
n3
T0
P3
MA1
n10
n2
RSA
P2
MA0
n9
n1
RSB
P1
0
n8
n0
OS
P0
A
A
A
A
A
Note
1. A = Acknowledge.
ADDRESS SELECTION
VS = +5 V (PLL supply voltage)
MA1
MA0
ADDRESS
0
0
1
1
0
1
0
1
C0
C2
C4
C6
VOLTAGE AT PIN 15 (see note 1)
0 to 0.1VS
0.2 to 0.3VS
0.4 to 0.6VS
0.9VS to VS
Note
1. If the AS pin is left floating, the internal bias will automatically set the address to C2.
PROGRAMMABLE DIVIDER SETTINGS (BYTES 1 AND 2)
Divider ratio:
N = 16 × {fRF(pc) + fIF(pc)}, where (pc) is picture carrier and fRF and fIF are expressed in MHz
fosc = N⁄16 (MHz).
N = (8192 × n13) + (4096 × n12) + (2048 × n11) + (1024 × n10) + (512 × n9) + (256 × n8) + (128 × n7) + (64 × n6) +
(32 × n5) + (16 × n4) + (8 × n3) + (4 × n2) + (2 × n1) + n0
CONTROL BYTE
Charge pump settings:
CP = 1, for fast tuning
CP = 0, for moderate speed tuning with slightly better residual oscillator FM.
It is recommended to set CP = 1 at all times in the TV mode. In the FM radio mode, set CP = 1 only during the search
tuning. Once the wanted channel is obtained, set CP = 0 to get the best signal-to-noise ratio.
Test mode settings:
T2 = T1 = 0; T0 = 1, for normal operation.
1997 Feb 03
13
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
PLL disabling:
OS = 0, for normal operation
OS = 1, for switching the charge pump to the high impedance state.
Ratio select bits
RSA
RSB
X
0
1
0
1
1
STEP SIZE
50 kHz
31.25 kHz
62.5 kHz
PORTS BYTE
FUNCTION
BIT
P7
P6
P5
P4
1
1
1
0
0
0
0
0
1
1
0
1
0
0
1
1
P3
P2
P1
P0
TV/FM bandswitching
FM band
Low band
Mid band
High band
1
0
0
0
TV mode
Power down mode; see note 1
System M, N negative mode
0
0
0
0
0
0
1
0
0
0
0
1
1
1
1
1
0
0
1
0
1
0
0
0
FM radio mode
AFC; see note 2
RIF; see note 3
Mono
Mute
Notes
1. If the TV function is not required, the tuner can be switched to power-down mode. In this mode the tuner reduces the
current consumption by up to 100 mA.
2. By this setting the FM radio AFC status can be read from the A/D bits in the status byte.
3. By this setting the RF input level can be read from the A/D bits in the status byte.
1997 Feb 03
14
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
TELEGRAM EXAMPLES (WRITE MODE)
Start - Adb - Ack - Db1 - Ack - Db2 - Ack - Cb - Ack - Pb - Ack - Stop.
Start - Adb - Ack - Cb - Ack - Pb - Ack - Db1 - Ack - Db2 - Ack - Stop.
Start - Adb - Ack - Db1 - Ack - Db2 - Ack - Cb - Ack - Stop.
Start - Adb - Ack - Db1 - Ack - Db2 - Ack - Stop.
Where:
Start = start condition
Adb = address byte
Ack = acknowledge
Db1 = divider byte 1
Db2 = divider byte 2
Cb = control byte
Pb = ports byte
Stop = stop condition.
READ mode
The in-lock can be read by setting the R/W bit to 1.
BITS
BYTE
Address byte
Status byte
7
MSB
6
5
4
3
2
1
0
LSB
A(5)
1
1
0
0
0
MA1
MA0
1
A
POR(1)
FL(2)
I2(3)
I1(3)
I0(3)
A2(4)
A1(4)
A0(4)
A
Notes
1. POR = Power On Reset. POR is internally set to 1 in case VS drops below 3 V. The POR bit is reset when an end of
data is detected by the PLL IC.
2. FL = In-lock flag; FL = 1: loop is phase-locked. The loop must be phase-locked during at least 8 periods of the internal
reference frequency (either 7.8125 kHz, 3.90625 kHz or 6.25 kHz) before the FL flag is internally set to 1.
3. I2, I1 and I0 = digital information for I/O ports P2, P1 and P0 respectively.
4. A2, A1 and A0 = built-in 5-level A/D converter on the internal I/O port P6 (see Table “Digital AFC status”).
5. A = Acknowledge.
TELEGRAM EXAMPLES (READ MODE)
Start - Adb - Ack - STB - Ack - STB - - Stop (no Ack from processor = End-of-data).
Start - Adb - Ack - STB - - Stop (no Ack from processor = End-of-data).
Where:
STB = Status byte.
1997 Feb 03
15
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
Video buffer
handbook, halfpage
A video buffer is built into the video module to enable the
unit to drive a 75 Ω load directly.
VCC
I2C-bus load
R1
R3
100 Ω
R2
R4
15
C1
56 pF
C2
22 pF 14
100 Ω
R5
100 Ω
PLL IC
The FM1236 contains a series resistor (R = 100 Ω) in the
SCL and SDA lines. Both lines also have a capacitive load
of typical 22 pF (see Fig.3).
AS
13
SDA
SCL
C3
22 pF
CCA507
Fig.3 I2C-bus load.
1997 Feb 03
16
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
MECHANICAL DATA
handbook, full pagewidth
8.1
±0.3
(1)
(1)
∅ 8.35
STANDARD PHONO CONNECTOR
78.4
17.5
±0.3
2.5
2
0.5
5.1
7.9
(2)
∅ 12.3
4
14.7
F CONNECTOR
59.2
13.5 max
TH 1
TH2
34.7
34.7
29.2
TH4
TH3
9 10 11
12 13 14 15
20 21 22
0.64 × 0.64
23 24 25
4.445
89.2
Dimensions in mm.
(1) Standard phono socket female 75 Ω.
(2) Alternative IEC connection.
Fig.4 Mechanical outline FM-versions.
1997 Feb 03
2.6
10.85
17
CCA508
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
Aerial connections
Mass
Standard-phono socket female 75 Ω or F (female).
Approximately 50 g.
Solderability
Robustness of pins
The solderability of pins and mounting tags when tested
initially and after 16 hours steam ageing in accordance
with ‘‘IEC 68-2-20’’, test Ta, method 1 (solder bath
235 ±5 °C for 2 ±5 s), results in a wetted area of 95%.
No de-wetting will occur when soldered at
260 ±5 ° C for 5 ±0.5 s.
The pins will not be damaged when tested in accordance
with ‘‘IEC 68-2-21’’ :
• Test Ua1, tensile of 20 N in axial direction
Resistance to soldering heat
Punching pattern of chassis PCB
The product will not be damaged when tested in
accordance with ‘‘IEC 68-2-20’’, test Tb, method 1A
(solder bath 260 ±5 °C for 5 ±1 s).
Field rejects are often related to broken tag joints.
Therefore, the following punching pattern is recommended
(see Fig.5).
• Test Ua2, thrust of 4 N in axial direction
• Test Ua2, thrust of 2 N in axial direction.
78.4
handbook, full pagewidth
0.9 +0.1
0
4.6
3.5
2
34.7
unit
contour
∅ 2.1
∅ 1.1
2.6
CCA509
14.7
4.445
59.2
Dimensions in mm.
Fig.5 Punching pattern seen from solder side.
1997 Feb 03
18
Philips Components
Preliminary specification
Desktop video & FM radio module
system M, N
FM1236
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
PURCHASE OF PHILIPS I2C COMPONENTS
Purchase of Philips I2C components conveys a license under the Philips’ I2C patent to use the
components in the I2C system provided the system conforms to the I2C specification defined by
Philips. This specification can be ordered using the code 9398 393 40011.
1997 Feb 03
19
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COD09
© Philips Electronics N.V. 1997
All rights are reserved. Reproduction in whole or in part is prohibited without the
prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or
contract, is believed to be accurate and reliable and may be changed without notice.
No liability will be accepted by the publisher for any consequence of its use. Publication
thereof does not convey nor imply any license under patent- or other industrial or
intellectual property rights.
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Printed in The Netherlands