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INTEGRATED CIRCUITS
DATA SHEET
SAB6456 SAB6456T Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
Product specification File under Integrated Circuits, IC02 June 1986
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
GENERAL DESCRIPTION
SAB6456 SAB6456T
The SAB6456/SAB6456T is a prescaler for UHF/VHF tuners. It can be switched to divide-by-64 or divide-by-256 by the mode-control (MC) pin. The circuit has an input frequency range of 70 MHz to 1 GHz, has high input sensitivity and good harmonic suppression.
Fig.1 Block diagram.
QUICK REFERENCE DATA PARAMETER Supply voltage Supply current Input frequency range Sensitivity to input voltage (r.m.s. value) Output voltage (peak-to-peak value) Operating ambient temperature range PACKAGE OUTLINES SAB6456 : 8-lead DIL; plastic (SOT97); SOT97-1; 1996 November 18. SAB6456T: 8-lead mini-pack (SO8; SOT96A); SOT96-1; 1996 November 18. Tamb 0 - 80 C pins 6 and 7 Vo(p-p) - 1 - V Vi(rms) - - 10 mV CONDITIONS pin 8 to pin 4 pin 8 pins 2 and 3 SYMBOL VCC ICC fi - 70 MIN. 4,5 TYP. 5,0 21 - - 1000 MAX. 5,5 V mA MHz UNIT
June 1986
2
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
PINNING 1. 2. 3. 4. 5. 6. 7. 8. Fig.2 Pinning diagram. n.c. C1 C2 VEE MC QH QL VCC not connected
SAB6456 SAB6456T
differential inputs ground (0 V) mode control complementary outputs positive supply voltage
FUNCTIONAL DESCRIPTION The circuit comprises an input amplifier, a divider stage with selectable division ratio and an output stage. The input amplifier is driven by a sinusoidal signal from the local oscillator of a television tuner. The inputs (C1, C2) are differential and are biased internally to permit capacitive coupling. When driven asymmetrically the unused input should be connected to ground via a capacitor. The mode-control (MC) input to the divider stage is intended for static control of the division ratio, selection is made as follows: divide-by-64: MC pin open-circuit divide-by-256: MC pin connected to ground The divider stage may oscillate during no-signal conditions but this oscillation is suppressed when input signals are received. Two complementary signals (QH, QL) are provided by the output differential amplifier stage. The voltage-edges of the output signals are slowed internally to reduce harmonics in the television intermediate frequency band.
June 1986
3
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
ELECTROSTATIC DISCHARGE PROTECTION
SAB6456 SAB6456T
Inputs and outputs have electrostatic discharge protection according to specification MIL-883C, class B. RATINGS Limiting values in accordance with the Absolute Maximum System (IEC-134) PARAMETER Supply voltage Input voltage Storage temperature range Junction temperature THERMAL RESISTANCE From junction to ambient 8-lead DIL; plastic (SOT-97A) 8-lead mini-pack (SO-8; SOT-96A) on printed circuit board on ceramic substrate Rth j-a Rth j-a 260 K/W 170 K/W Rth j-a 120 K/W CONDITIONS pin 8 to pin 4 SYMBOL VCC Vi Tstg Tj - - -55 - MIN. - - - - TYP. MAX. 7,0 VCC + 150 + 150 V V C C UNIT
D.C. CHARACTERISTICS VCC = 5 V; VEE = 0 V; Tamb = 25 C; test IC mounted in a test socket or on a printed circuit board; measurements taken after thermal equilibrium is established PARAMETER Output voltage HIGH Output voltage LOW Supply current Mode-control (MC) Input voltage LOW (divide-by-256) Input current LOW Input voltage HIGH (divide-by-64) pin 5 open-circuit VIH 1,4 - 3,0 V VIL -IL 0 - - 25 0,2 60 V A CONDITIONS VOH VOL ICC SYMBOL - - - MIN. TYP. - - 21 MAX. VCC VCC - 0.8 28 UNIT V V mA
June 1986
4
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
A.C. CHARACTERISTICS VCC = 4,5 to 5,5 V; VEE = 0 V; Tamb = 0 to +80 C PARAMETER Sensitivity to input voltage (r.m.s. value) CONDITIONS 50 system fi = 70 MHz Vi(rms) Vi(rms) Vi(rms) Vi(rms) Vi(rms) Vi(rms) - - - - - - - - - - - - 10 10 10 10 10 10 SYMBOL MIN. TYP.
SAB6456 SAB6456T
MAX.
UNIT mV mV mV mV mV mV
fi = 150 MHz fi = 300 MHz fi = 500 MHz fi = 900 MHz fi = 1000 MHz Input overload voltage (r.m.s. value) Input parallel resistance Input capacitance Output voltage HIGH Output voltage LOW Output voltage swing (peak-to-peak value) fi = 70 MHz 50 system fi = 70 MHz to 1000 MHz fi = fi = 70 MHz 70 MHz fi = 1000 MHz fi = 1000 MHz
Vi Ri Ri Ci Ci VOH VOL
300 - - - - - -
- 560 30 5 1,5 - -
- - - - - VCC VCC - 0,8
mV pF pF V V
Vo(p-p)
0,8
1,0
1,2
V
fi = 1000 MHz; RL = 820 ; CL = 60 pF Attenuation of third harmonic at output fi = 800 MHz; RL = 820 ; CL = 60 pF Output unbalance Output resistance see Fig.3 Vo Ro -15 - - -23 - 500 - 0,1 - dB V Vo(p-p) 0,17 - - V
June 1986
5
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
SAB6456 SAB6456T
Fig.4 Fig.3 Test circuit for output unbalance measurement.
Typical input sensitivity curve: VCC = 5 V; Tamb = 25 C.
Fig.5 Smith chart of typical input impedance: Vi(rms) = 25 mV; VCC = 5 V; reference value = 50 .
June 1986
6
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
PACKAGE OUTLINES DIP8: plastic dual in-line package; 8 leads (300 mil)
SAB6456 SAB6456T
SOT97-1
D seating plane
ME
A2
A
L
A1
c Z e b1 wM (e 1) b2 5 MH
b 8
pin 1 index E
1
4
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 4.2 0.17 A1 min. 0.51 0.020 A2 max. 3.2 0.13 b 1.73 1.14 0.068 0.045 b1 0.53 0.38 0.021 0.015 b2 1.07 0.89 0.042 0.035 c 0.36 0.23 0.014 0.009 D (1) 9.8 9.2 0.39 0.36 E (1) 6.48 6.20 0.26 0.24 e 2.54 0.10 e1 7.62 0.30 L 3.60 3.05 0.14 0.12 ME 8.25 7.80 0.32 0.31 MH 10.0 8.3 0.39 0.33 w 0.254 0.01 Z (1) max. 1.15 0.045
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT97-1 REFERENCES IEC 050G01 JEDEC MO-001AN EIAJ EUROPEAN PROJECTION
ISSUE DATE 92-11-17 95-02-04
June 1986
7
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
SO8: plastic small outline package; 8 leads; body width 3.9 mm
SAB6456 SAB6456T
SOT96-1
D
E
A X
c y HE vMA
Z 8 5
Q A2 A1 pin 1 index Lp 1 e bp 4 wM L detail X (A 3) A
0
2.5 scale
5 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 1.75 A1 0.25 0.10 A2 1.45 1.25 A3 0.25 0.01 bp 0.49 0.36 c 0.25 0.19 D (1) 5.0 4.8 0.20 0.19 E (2) 4.0 3.8 0.16 0.15 e 1.27 HE 6.2 5.8 L 1.05 Lp 1.0 0.4 Q 0.7 0.6 v 0.25 0.01 w 0.25 0.01 y 0.1 Z (1) 0.7 0.3
0.010 0.057 0.069 0.004 0.049
0.019 0.0100 0.014 0.0075
0.244 0.039 0.028 0.050 0.041 0.228 0.016 0.024
0.028 0.004 0.012
8 0o
o
Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT96-1 REFERENCES IEC 076E03S JEDEC MS-012AA EIAJ EUROPEAN PROJECTION
ISSUE DATE 95-02-04 97-05-22
June 1986
8
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our "IC Package Databook" (order code 9398 652 90011). DIP SOLDERING BY DIPPING OR BY WAVE The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. REPAIRING SOLDERED JOINTS Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds. SO REFLOW SOLDERING Reflow soldering techniques are suitable for all SO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement.
SAB6456 SAB6456T
Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 C. WAVE SOLDERING Wave soldering techniques can be used for all SO packages if the following conditions are observed: * A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. * The longitudinal axis of the package footprint must be parallel to the solder flow. * The package footprint must incorporate solder thieves at the downstream end. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Maximum permissible solder temperature is 260 C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 C within 6 seconds. Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. REPAIRING SOLDERED JOINTS Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C.
June 1986
9
Philips Semiconductors
Product specification
Sensitive 1 GHz divide-by-64/divide-by-256 switchable prescaler
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
SAB6456 SAB6456T
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. 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.
June 1986
10

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