TI SN761672A

SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
D
D
D
D
D
D
D
D
D
Single Chip Mixer/Oscillator and
Synthesizer
VHF-L, VHF-H, UHF 3-Band Local Oscillator
I2C Bus Protocol
Bidirectional Data Transmission
30-V Tuning Voltage Output
4-Channel NPN Type Band Switch Drivers
Programmable Reference Divider Ratio
(512, 640 or 1024)
5-V Power Supply
32-Pin TSSOP Package
description
DA PACKAGE
(TOP VIEW)
VOL OSC B
VOL OSC C
OSC GND
VHS OSC B
VHS OSC C
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
IF OUT1
IF OUT2
VCC
CP
VTU
XTAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
UHF RF IN2
UHF RF IN1
VHF RF IN2
VHF RF IN1
RF GND
MIX OUT2
MIX OUT1
BS4
BS3
BS2
BS1
NC
ADC
AS
SDA
SCL
SN761672A is a single chip synthesized tuner IC
designed for TV/VCR tuning systems. The circuit
consists of a PLL synthesizer, 3-band local
oscillators and mixer, a 30-V output tuning
NC – No internal connection
amplifier, and four NPN band switch drivers. It is
available in a small package outline. The 15-bit
programmable counter and reference divider is controlled by I2C bus protocol. Tuning step frequency is
selectable by this reference-divider ratio for a 4-MHz crystal oscillator.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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1
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
VHF-L
OSC
VHF-H
OSC
V CC
MIX OUT2
MIX OUT1
UHF OSC B2
UHF OSC C2
UHF OSC C1
UHF OSC B1
VHI OSC C
VHI OSC B
OSC GND
VOL OSC C
VOL OSC B
block diagram
UHF
OSC
IF
Amplifier
IF OUT1
IF OUT2
IF GND
VHF RF IN1
VHF
Mixer
VHF RF IN2
UHF
Mixer
UHF RF IN1
UHF RF IN2
RF GND
1/8
Prescaler
1/32, 1/33
Prescaler
15 Bit
Counter
CP
OP
AMP
XTAL
XTAL
OSC 4 MHz
512/640/1024
Prescaler
Phase
Detector
Charge
Pump
NPN Band Switch Port
SCL
SDA
I2C Bus
Interface
AS
2
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• DALLAS, TEXAS 75265
BS4
BS3
BS2
ADC
BS1
5-Level
ADC
NC
VTU
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
Terminal Functions
TERMINAL
NAME
NO.
ADC
20
AS
BS1
BS2
BS3
BS4
I/O
DESCRIPTION
I
ADC input (see Figure 7)
19
I
Address selection input (see Figure 7)
22
23
24
25
O
Band switch1 output (NPN emitter follower) ( see Figure 8)
CP
14
O
Charge pump output (see Figure 5)
IF GND
10
IF ground (see Figure 4)
IF OUT1
11
O
IF output (see Figure 4)
IF OUT2
12
O
IF output (see Figure 4)
MIX OUT1
MIX OUT2
26
27
O
Mixer outputs (see Figure 9)
OSC GND
3
RF GND
28
SCL
17
I
SDA
18
I/O
UHF OSC B1
6
I
UHF oscillator input, base 1 (see Figure 3)
UHF OSC B2
9
I
UHF oscillator input, base 2 (see Figure 3)
UHF OSC C1
7
O
UHF oscillator output, collector 1 (see Figure 3)
UHF OSC C2
8
O
UHF oscillator output, collector 2 (see Figure 3)
UHF RF IN1
UHF RF IN2
31
32
I
UHF RF inputs (see Figure 11)
VCC
VHF RF IN1
VHF RF IN2
13
VHI OSC B
VHI OSC C
VLO OSC B
VLO OSC C
29
30
OSC ground
RF ground
Serial clock input (see Figure 7)
Serial data input/output (see Figure 7)
Supply voltage for mixer/oscillator/PLL: 5 V
I
VHF RF inputs (see Figure 10)
4
I
VHF hi oscillator input base (see Figure 2)
5
O
VHF hi oscillator output collector (see Figure 2)
1
I
VHF low oscillator input base (see Figure 1)
2
O
VHF low oscillator output collector (see Figure 1)
VTU
15
O
Tuning voltage amplifier output (see Figure 5)
XTAL
16
I
4-MHz crystal oscillator input (see Figure 6)
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SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
schematics
2
5
1
4
3 kΩ
3 kΩ
3 kΩ
Figure 1
3 kΩ
Figure 2
7
8
11
12
6
9
3 kΩ
3 kΩ
Figure 3
Figure 4
15
16
14
Figure 5
4
Figure 6
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SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
schematics (continued)
18
20
17
19
Figure 7
27
5 pF
22, 23,
24,25
26
5 pF
50 kΩ
Figure 8
29
Figure 9
30
3 kΩ
31
32
3 kΩ
Figure 10
Figure 11
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5
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
absolute maximum ratings over operating free-air temperature (unless otherwise noted)†
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V ~ 7 V
Input voltage 1, VI(GND) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V ~ 0.4 V
Input voltage 2, VI(VTU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V~ 35 V
Input voltage 3, V(VTU) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V ~ 7 V
Continuous total dissipation at (or below TA = 25°C . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 20°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Maximum junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Maximum lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . 260°C
Maximum short circuit time, t(SCMAX), All pins to VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBD
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Voltage values are with respect to the IF GND of the circuit.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
OPERATING FACTOR
TA ≤ 25°C
DA
1040 mW
8.33 mW/°C
recommended operating conditions
MIN
Supply voltage, VCC
4.5
Tuning supply voltage, VSS(TU)
Output current of band switch, one port ON, IO
Operating free-air temperature, TA
–20
NOM
MAX
5
5.5
30
33
V
10
mA
85
°C
CAUTION:
It is advised that precautions to be taken to avoid damage due to high static voltages or
electrostatic fields in handling this device. Pins 4–6 and 9 withstand 150 V, and all other pins
withstand 200 V, according to EIAJ (0 Ω, 200 pF).
6
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UNIT
V
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
electrical characteristics
total device and serial interface (VCC 4.5 V to 5.5 V, TA = –20°C to 85°C) (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
60
80
mA
70
90
mA
ICC(1)
ICC(2)
Supply current 1
VIH
VIL
High-level input voltage (SCL, SDA)
Low-level input voltage (SCL, SDA)
1.5
V
IIH
IIL
High-level input current (SCL, SDA)
10
µA
Supply current 2
Power on reset supply voltage
V(ASH)
V(ASM)
Address select input voltage (AS)
I(ASL)
V(ADC)
3
Low-level input current (SCL, SDA)
V(POR)
V(ASL)
I(ASH)
One band switch ON – I(BS) = 10 mA
V
µA
–10
Threshold of supply voltage between
reset and operation mode
2.1
High
0.9 VCC ~ VCC
4.5
Mid
0.4 VCC ~ 0.6 VCC
Low
0 VCC ~ 0.1 VCC
2.8
3
10
–10
ADC input voltage
See Table 9
IIL(ADH)
IIL(ADL)
ADC high-level input current
V(ADC) = VCC
V(ADC) = 0 V
f(SCL)
th(HLD)
Clock frequency (SCL)
Data hold time
See timing chart, Figure 1
0
VOL
Ilkg(SDA)
Low-level output voltage (SDA)
VCC = 5 V,
V(SDA) = 5.5 V
VCC
10
µA
V
µA
µA
–10
100
High-level output leakage current (SDA)
V
0.5
Low
ADC low-level input current
V
5
2
High
Address select input current (AS)
3.5
400
kHz
µs
0
IOL = 3 mA
0.4
V
10
µA
PLL and band switch (VCC 4.5 V to 5.5 V, TA = –20°C to 85°C) (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
14-bit frequency word
256
15-bit frequency word
256
TYP
MAX
UNIT
16383
N
Divider ratio
F(XTAL)
Z(XTAL)
Crystal oscillator
V(VTUL)
I(VTUOFF)
Tuning amplifier low-level output voltage
RL = 27K,
Tuning amplifier leakage current (OFF)
OS = 1,
I(CPH)
I(CPL)
Charge pump high-level input current
CP = 1
280
µA
Charge pump low-level input current
CP = 0
60
µA
V(CP)
Charge pump output voltage
In-lock
1.95
V
I(CPOFF)
Charge pump leakage current
T2 = 0, T1 = 1,
TA = 25°C
I(BS)
V(SBS1)
Band switch driver output current
V(SBS2)
Ilkg(BSOFF)
RXTAL = 25 Ω to 300 Ω
32767
4
Crystal oscillator input impedance
MHz
1.6
V(TU) = 33 V
V(TU) = 33 V
Band switch driver output voltage
I(BS) = 10 mA
I(BS) = 10 mA,
TA = 25°C
Band switch driver leakage current
V(BS) = 0 V
POST OFFICE BOX 655303
VCP = 2 V,
0.2
0.3
–15
k
0.46
V
10
µA
15
nA
10
mA
3
VCC = 5 V,
3.5
V
3.9
3
• DALLAS, TEXAS 75265
µA
7
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
electrical characteristics (continued)
mixer, oscillator, IF amplifier (VCC 5 V, TA = 25°C, measured in reference measurement circuit at 50 W system,
IF filter characteristics: fpeak = 43 MHz) (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
Conversion gain (mixer ~ IF amplifier,
amplifier VHF-low
VHF low
fin = 59 MHz (see Note 2)
fin = 130 MHz
20
23
26
20
23
26
Conversion gain (mixer ~ IF amplifier,
amplifier VHF
VHF-high
high
fin = 136 MHz (see Note 2)
fin = 364 MHz
20
23
26
20
23
26
Conversion gain (mixer ~ IF amplifier,
amplifier VHF
VHF-UHF
UHF
fin = 370 MHz (see Note 2)
fin = 804 MHz
22
25
28
20
23
26
NF1
NF3
low
Noise figure VHF
VHF-low
fin = 55.25 MHz
fin = 127.25 MHz
9.5
NF4
NF6
Noise figure VHF
VHF-low
low
fin = 133.25 MHz
fin = 361.25 MHz
10
NF7
NF9
Noise figure UHF
fin = 367.25 MHz
fin = 801.25 MHz
CM1
CM3
1% cross modulation distortion VHF-low
VHF low
fin = 55.25 MHz (see Note 3)
fin = 801.25 MHz
91
CM4
CM6
1% cross modulation distortion VHF-high
VHF high
fin = 133.25 MHz (see Note 3)
fin = 361.25 MHz
91
CM7
CM9
1% cross modulation distortion UHF
fin = 367.25 MHz (see Note 3)
fin = 801.25 MHz
88
V(IFO1)
V(IFO3)
IF output voltage VHF-low
VHF low
fin = 55.25 MHz (see Note 4)
fin = 127.25 MHz
117
V(IFO4)
V(IFO6)
VHF high
IF output voltage VHF-high
fin = 133.25 MHz (see Note 4)
fin = 361.25 MHz
117
V(IFO7)
V(IFO9)
IF output voltage UHF
fin = 367.25 MHz (see Note 4)
fin = 801.25 MHz
117
G(c1)
G(c3)
G(c4)
G(c6)
G(c7)
G(c9)
Prescaler beat (see Note 5)
NOTES: 2.
3.
4.
5.
8
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dB
dB
dB
dB
9.5
dB
10
9
dB
10
dBµV
91
dBµV
91
dBµV
88
dBµV
117
dBµV
117
dBµV
117
25
IF = 43 MHz, RF input level = 80 dB µV
f(undes) = f(des) ±6 MHz, pin = 80 dBµV, AM 1 kHz, 30%, DES/CM=S/I=46 dB
IF = 45.75 MHz
Design parameter, not tested
UNIT
dBµV
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
function description
The device can be controlled according to the I2C bus format.
Table 1. Serial Interface Function
PIN
PIN NAME
17
SCL
Clock input
18
SDA
Data input/output
19
AS
20
ADC
FUNCTION
Address selection input
ADC input/test output
I2C bus mode
I2C write mode (R/W = 0)
Table 2. Write Data Format
MSB
LSB
ACKNOWLEDGE
Address byte (ADV)
1
1
0
0
0
MA1
MA0
R/W 0
A
Divider byte 1 (DB1)
0
N14
N13
N12
N11
N10
N9
N8
A
Divider byte 2 (DB2)
N7
N6
N5
N4
N3
N2
N1
N0
A
Control byte (CB)
1
CP
T2
T1
T0
RSA
RSB
OS
A
Band switch byte (BB)
X
X
X
X
BS4
BS3
BS2
BS1
A
Table 3. Description of Data Symbol
SYMBOL
DESCRIPTION
MA1, MA0
Address set bits (see Table 4)
N14...N0
Programmable counter set bits
DEFAULT
N=N14*2^14+N13*2^13+...+N1*2+N0
Nn = 0
Charge pump current set bit
60 µA (CP=0) 280 µA (CP=1)
CP = 1
T2, T1, T0
Test bits (see table 5)
Normal Mode: T2=0, T1=0, To=1/0
T2=0, T1=0, T0=1
RSA, RSB
Reference divider ratio selection bits (see Table 6)
RSA=0, RSB=1
Tuning amplifier control bit
OS=0
CP
OS
BS4...BS1
Band switch ports control bits
BSn=0:OFF
Band selection by BS1,2,4 (X = don’t care)
VHF-LO
VHF-HI
UHF
X
Tuning voltage on (OS=0)
Tuning voltage off, high impedance (OS=1)
BS1
1
X
X
BS2
0
1
X
BSn=1:ON
BSn=0
BS4
0
0
1
Don’t care
Table 4. Address Selection
MA1
MA0
0 V to 0.1 VCC
VOLTAGE APPLIED ON CE INPUT
0
0
Always valid
0
1
0.4 VCC to 0.6 VCC
1
0
0.9 VCC to VCC
1
1
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SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
I2C bus mode (continued)
Table 5. Test Bits (see Note 7)
T2
T1
T0
0
0
0
Normal operation
FUNCTION
0
0
1
Normal operation
0
1
X
Charge pump off
1
1
0
Charge pump sink
1
1
1
Charge pump source
1
0
0
Reference counter output is available on ADC pin.
Not available ADC
1
0
1
Main counter output is available on ADC pin (see Note 7).
Not available ADC
Default
NOTES: 6. Not used for other bit-patterns.
7. Main counter input is bypassed 1.8 and 1.32, 1/33 prescaler from oscillator, at this mode. (Fosc ≤ 4 MHz)
Table 6. Ratio Select Bits
RSA
RSB
REFERENCE DIVIDER
RATIO
X
0
640
0
1
1024
1
1
512
I2C read mode (R/W = 1)
Table 7. Read Data Format
MSB
Address byte (ADB)
Status byte (SB)
LSB
ACKNOWLEDGE
1
1
0
0
0
MA1
MA0
R/W=1
A
POR
FL
1
1
1
A2
A1
A0
A
Table 8. Description of Data Symbol
SYMBOL
DESCRIPTION
DEFAULT
MA1, MA0
Address set bits (see Table 4)
POR
Power-on reset flag
POR set: power on
POR reset: end-of-data transmission procedure
FL
In-lock flag
PLL lock (FL = 1) Unlock (FL = 0)
A2...A0
Digital data of ADC (see Table 9)
POR = 1
Table 9. ADC Level
VOLTAGE APPLIED ON ADC INPUT
10
A2
A1
A0
0.6 V to VCC
1
0
0
0.45 VCC to 0.6 VCC
0
1
1
0.3 VCC to 0.45 VCC
0
1
0
0.15 VCC to 0.3 VCC
0
0
1
0 VCC to 0.15 VCC
0
0
0
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SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
I2C read mode (R/W = 1) (continued)
Start
SCL
1/2 VCC
tHLD(DAT)
SDA
Figure 12. I2C Timing Chart
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SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
APPLICATION INFORMATION
C21
R1
C50
C3
C1
VC1
C2
L1
R2
2
3
C6
VC2
C4
C5
L2
C7
L3
R3
1
C11
C8
VC3
L4
R33
C9
C12
C10
R32
4
5
6
7
8
9
10
C13
11
IF OUT1
C14 C16
IF OUT2
C17
13
R8
C18
C65
12
R7
14
15
C20
C24
VOL OSC B
VOL OSC C
UHF RF IN2
UHF RF
OSC GND
VHF RF IN2
VHI OSC B
VHF RF IN1
VHI OSC C
RF GND
UHF OSC B1
MIX OUT2
UHF OSC C1
MIX OUT1
UHF OSC C2
BS4
UHF OSC B2
BS3
IF GND
BS2
IF OUT1
BS1
IF OUT2
VCC
NC
ADC
CP
VTU
AS
SDA
X1
16
R9
XTAL
SCL
C38
32
31
URF
C37
30
C70
29 C35
VRF
28
L10
27
26
C38
L9
25
UB
24
FMB
23
HB
22
LB
21
R21
20
R19
19
R18
18
R17
17
R16
C22
C24
TU
C75
VCC
NOTE 8: This application information is advisory and performance-check is required at actual application circuits.
Figure 13. Reference Measurement Circuit
12
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• DALLAS, TEXAS 75265
ADC
AS
SDA
SCL
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
APPLICATION INFORMATION
component values for measurement circuit
PARTS NAME
U1
VALUE
PARTS NAME
VALUE
SN761672A
C1
1 pF
VC1
1T363A
C2
1 pF
VC2
1T363A
C3
47 pF
VC3
1T363A
C4
2 pF
L1
Diameter 3.0 mm 8T
C5
3 pF
L2
Diameter 2.4 mm 4T
C6
86 pF
L3
Diameter 3.0 mm 2T
C7
1.5 pF
L4
Diameter 2.0 mm 3T
C8
1.5 pF
L9
Diameter 2.4 mm 15T
C9
1.5 pF
L10
Diameter 2.4 mm 15T
C10
1.5 pF
X1
X’tal 4 MHz
C11
100 pF
R1
33 kΩ
C12
12 pF
R2
33 kΩ
C13
2.2 nF
R5
33 kΩ
C14
2.2 nF
R7
22 kΩ
C16
2.2 nF
R8
33 kΩ
C17
2.2 nF
R9
22 kΩ
C18
0.1 µF
R16
330 Ω
C20
2.2 nF
R17
330 Ω
C21
2.2 nF
R18
330 Ω
C22
2.2 nF
R21
0Ω
C24
5 pF
R19
330 Ω
C33
27 pF
R32
56 Ω
C35
2.2 nF
R33
22 kΩ
C37
2.2 nF
C38
2.2 nF
C39
2.2 nF
C50
3 pF
C65
2.2 nF
C70
2.2 nF
C75
10 pF
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13
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
APPLICATION INFORMATION
test circuit
Signal
Generator
DUT
Spectrum
Analyser
Figure 14. Measurement Circuit of Conversion Gain
NF
Meter
Noise
Source
DUT
Figure 15. Noise Figure Measurement Circuit
Signal
Generator
fdes: P = 80 dBuV
Mix
Pad
Signal
Generator
DUT
Modulation
Analyser
fdes +6 MHz
AM 30%, 1 kHz
Figure 16. 1% Cross Modulation Distortion Measurement Circuit
14
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
TYPICAL CHARACTERISTICS
S-parameter
VHF-Input
UHF-Input
Figure 17
Figure 18
IF-Output
Figure 19
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15
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
TYPICAL CHARACTERISTICS
SUPPLY VOLTAGE
vs
BS CURRENT
5
VSS – Supply Voltage – V
VCC = 5.5 V
VCC = 5.0 V
4
VCC = 4.5 V
3
2
1
0
–2
–4
–6
–8 –10 –12 –14 –16 –18 –20
ISS – BS Current IBS –mA
Figure 20. Band Switch Driver Output Voltage
16
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
MECHANICAL DATA
DA (R-PDSO-G**)
PLASTIC SMALL-OUTLINE
38 PINS SHOWN
0,30
0,19
0,65
38
0,13 M
20
6,20
NOM
8,40
7,80
0,15 NOM
Gage Plane
1
19
0,25
A
0°– 8°
0,75
0,50
Seating Plane
0,15
0,05
1,20 MAX
PINS **
0,10
30
32
38
A MAX
11,10
11,10
12,60
A MIN
10,90
10,90
12,40
DIM
4040066 / D 11/98
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion.
Falls within JEDEC MO-153
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17
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