TDA4657 Datasheet, PDF (9/17 Pages) NXP Semiconductors – Generic multi-standard decoder

Philips Semiconductors
Generic multi-standard decoder
Preliminary specification
TDA4657
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP.
Hue control (NTSC) and service switch (pin 11)
φ
phase shift of reference carrier
V₁₁ = 3 V
−30
−
relative to phase at open-circuit pin 11
V₁₁ = open-circuit −5
0
V₁₁ = 5 V
+30
−
V₁₁
internal bias voltage
(proportional to supply voltage)
pin 11 open-circuit 3.8
4.0
R₁₁
input resistance
25
30
Capacitor for identification (pins 12 and 13)
V₁₂, V₁₃ DC voltage for an identified signal
DC voltage for an unidentified signal
2.8
3.2
1.5
2.0
PLL oscillator measured with nominal crystal (pin 14; see Table 1)
R₁₄
initial oscillator amplifier input resistance
C₁₄
oscillator amplifier input capacitance
∆f_L
lock-in-range referenced to
4.43361875 MHz
note 9
φ
phase difference for ±400 Hz deviation of
colour carrier frequency
−500
−
−
−
±400
−
−
−
2 x f_sc output (pin 16; if the output is not used, the pin should be connected to supply)
V₁₆
DC output level
R₁₆
output resistance
I₁₆
output current
V₁₆
output signal (peak-to-peak value)
I₁₆ = 0 A
I₁₆ = 0 A
6.1
6.3
−
−
−
−
−
250
Standard setting inputs/outputs (pins 17 to 19; note 10)
used as output: npn emitter follower output with 0.1 mA source to ground
V_O
on-state, during scanning, colour OFF
on-state, colour ON
2.3
2.5
5.8
6.0
R_O
output resistance
I_O
output current
used as input: forced system switching
I_O = 0
−
−
−
−
V_O
threshold for system ON
I_O
input current
6.8
7.0
100
150
MAX.
−
+5
−
4.2
35
3.5
2.3
−
10
±1300
1
6.5
350
−1.0
−
2.7
6.2
300
−3
7.2
180
UNIT
degree
degree
degree
V
kΩ
V
V
Ω
pF
Hz
degree
V
Ω
mA
mV
V
V
Ω
mA
V
µA
June 1993
9