TDA8501 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TDA8501

PAL/NTSC encoder

Philips Electronics 

Philips Semiconductors

PAL/NTSC encoder

Preliminary specification

TDA8501

PAL/NTSC and Y/Y + SYNC

Pin 17 is used as a four level control pin to condition the Y/Y + SYNC input signal (via pin 5). Pin 17 is normally connected

to ground for PAL mode, or to VCC for the NTSC mode. By use of external resistors (potential divider connected to

pin 17), the input blanking at pin 5 can be switched on and off. (see Table 1 and Fig 14).

Table 1 PAL/NTSC Y/Y +SYNC pin 5 options (pin 17 connection configurations).

MODE

PAL

NTSC

PAL

NTSC

PIN 5 STATUS

PIN 17 CONNECTION REQUIREMENT

Y without sync and input blanking on

Y without sync and input blanking on

Y with sync and input blanking off

Y with sync and input blanking off

pin 17 LOW, connected to VSS

pin 17 HIGH, connected to VCC

pin 17 with 39 kΩ connected to VCC and 22 kΩ connected to VSS

pin 17 with 22 kΩ connected to VCC and 39 kΩ connected to VSS

LIMITING VALUES

In accordance with the Absolute Maximum System (IEC134); all voltages referenced to VSS (pin 10).

SYMBOL

PARAMETER

MIN.

MAX.

VCC

Tstg

Tamb

positive supply voltage

storage temperature

operating ambient temperature

0

5.5

−65

+150

−25

+70

UNIT

V

°C

°C

THERMAL RESISTANCE

SYMBOL

Rth j-a

PARAMETER

from junction to ambient in free air

SOT234

SOT137

THERMAL RESISTANCE

66 K/W

75 K/W

DC CHARACTERISTICS

VCC = 5 V; Tamb = 25 °C; all voltages referenced to ground (pin 10); unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

Supply (pin 8)

VCC

ICC

Ptot

VREF

supply voltage

supply current

total power dissipation

reference voltage output (pin 13)

4.5

5.0

−

40

−

200

2.425

2.5

MAX.

5.5

−

−

2.575

UNIT

V

mA

mW

V

April 1993

14

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