Document
TA1281F,TA1281FA,TA1281FN TENTATIVE TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA1281F,TA1281FA,TA1281FN
UHF / VHF TUNER IC
The TA1281F, TA1281FA, and TA1281FN are TV tuner ICs which integrate on a single chip IF amp, a mixer / oscillator for VHF band and cable TV, together with a mixer / oscillator for UHF band. Supply voltage of 5V helps lower power dissipation from the set. Compact 16-pin SSOP makes the tuner more compact.
FEATURES
= Supply voltage
: 5V
= VHF, CATV bands : MIX · OSC
= UHF band
: MIX · OSC
= Built-in IF amp
= IF unbalanced output
= Low power dissipation
Note:
These devices are easy damaged by high static voltage or electric fields. In regards to this, please handle with care.
Weight
SSOP16-P-225-1.000A : 0.14g (Typ.)
SOP16-P-225-1.27
: 0.16g (Typ.)
SSOP16-P-225-0.65B : 0.07g (Typ.)
000707EBA2
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc..
· The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk.
2001-02-21 1/12
BLOCK DIAGRAM
TA1281F,TA1281FA,TA1281FN
TERMINAL FUNCTION
PIN No.
PIN NAME
FUNCTION
1 16
VHF oscillator
VHF oscillator.
To prevent abnormal oscillation, connect a resistor between pin 1 and the external capacitor.
2 GND
GND
3 4
MIX output
Mixer output.
For tuning, connect a tank circuit between pins 3 and 4.
INTERFACE ―
5 IF output
IF output. Output impedance : 75Ω
6 VCC
VCC
―
000707EBA2
· The products described in this document are subject to the foreign exchange and foreign trade laws. · The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by
TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. · The information contained herein is subject to change without notice.
2001-02-21 2/12
PIN No.
PIN NAME
FUNCTION
TA1281F,TA1281FA,TA1281FN
INTERFACE
7 8
VHF input
VHF-RF input. Normally, ground pin 7 to AC using a capacitor and input to pin 8.
9 10
UHF input
UHF-RF input.
Either apply balanced input to pins 9 and 10 or ground pin 10 to AC and input to pin 9.
11 REG
Regulator output.
12
13 14
UHF oscillator
15
UHF oscillator.
Pin 12 uses both as band switch. Connecting pin 12 to VCC via 22kΩ sets to UHF ; connecting pin 12 to GND sets to VHF. To use VHF SW voltage open rather than GND, connect a resistor of around 10kΩ.
Changing capacitor of 6pF connected to pins 12 and 15 of test circuit 2 varies the oscillation frequency range. Be careful not to set the constant too large, because abnormal oscillation may occur.
MAXIMUM RATINGS (Ta=25°C)
CHARACTERISTIC
SYMBOL
RATING
UNIT
Power Supply Voltage Power Dissipation Operating Temperature Storage Temperature
VCC PD Topr Tstg
6.5 (Note) −20~85 −55~150
V mW °C °C
Note:
641mW for TA1281F (F-type), 543mW for TA1281FA (FA-type), 568mW for TA1281FN (FN-type). When using the device at above Ta=25°C, decrease the power dissipation F-type by 5.2mW, FA-type by 4.4mW and FN-type by 4.6mW for each increase of 1°C.
2001-02-21 3/12
RECOMMENDED OPERATING CONDITION
PIN No.
SYMBOL
MIN TYP. MAX UNIT
6
VCC
4.5 5.0 5.5
V
TA1281F,TA1281FA,TA1281FN
ELECTRICAL CHARACTERISTICS DC CHARACTERISTICS (Unless otherwise s.