TDA4657 Datasheet, PDF (2/17 Pages) NXP Semiconductors – Generic multi-standard decoder

Philips Semiconductors
Generic multi-standard decoder
Preliminary specification
TDA4657
FEATURES
• Low voltage (8 V)
• Low power dissipation (250 mW)
• Automatic standard recognition
• No adjustments required
• Reduced external components
• Not all time constants integrated
(ACC, SECAM de-emphasis).
GENERAL DESCRIPTION
The TDA4657 is a monolithic integrated multi-standard
colour decoder for PAL, SECAM and NTSC 4.43 MHz with
negative colour difference output signals. It is adapted to
the integrated baseband delay line TDA4660/61.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
Supply
V_P
I_P
P_tot
Inputs
V₉
V₂₀
Outputs
V₁
V₃
supply voltage
supply current
total power dissipation
chrominance input voltage
(peak-to-peak value)
sandcastle input voltage
colour difference output signals
(peak-to-peak value)
−(R−Y) output PAL and NTSC 4.43 MHz
SECAM
−(B−Y) output PAL and NTSC 4.43 MHz
SECAM
Notes to the quick reference data
1. Within 2 dB output voltage deviation.
2. Burstkey width 4.3 µs
Burst width 2.25 µs,
ratio burst chrominance amplitude 1/2.2.
CONDITIONS
MIN. TYP. MAX. UNIT
7.2 8.0 8.8 V
V_P = 8.0 V; without load 25
V_P = 8.0 V; without load −
31 37 mA
248 296 mW
note 1
20 200 400 mV
−
−
13.2 V
independent of supply voltage; note 2
442 525 624 mV
950 1050 1150 mV
559 665 791 mV
1200 1330 1460 mV
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
TDA4657
TDA4657T
PINS
20
20
Note
1. SOT146-1; 1996 November 26.
2. SOT163-1; 1996 November 26.
PIN POSITION
DIL
SO
PACKAGE
MATERIAL
plastic
plastic
CODE
SOT146⁽¹⁾
SOT163A⁽²⁾
June 1993
2