TDA4851 Datasheet, PDF (2/17 Pages) NXP Semiconductors – Horizontal and vertical deflection controller for VGA/XGA and autosync monitors

Philips Semiconductors
Horizontal and vertical deflection controller for
VGA/XGA and autosync monitors
Preliminary specification
TDA4851
FEATURES
• VGA operation fully implemented including
alignment-free vertical and E/W amplitude presettings
• 4th VGA mode easy applicable (XGA, Super VGA)
• Autosync operation externally selectable
• Low jitter
• All adjustments DC-controllable
• Alignment-free oscillators
• Sync separators for video or horizontal and vertical TTL
sync levels regardless of polarity
• Horizontal oscillator with PLL1 for sync and PLL2 for
flyback
• Constant vertical and E/W amplitude in autosync
operation
• DC-coupling to vertical power amplifier
• Internal supply voltage stabilization with excellent ripple
rejection to ensure stable geometrical adjustments
GENERAL DESCRIPTION
The TDA4851 is a monolithic integrated circuit for
economical solutions in VGA/XGA and autosync monitors.
The IC incorporates the complete horizontal and vertical
small signal processing.
VGA-dependent mode detection and settings are
performed on chip. In conjunction with TDA4860/61/65,
or TDA8351 (vertical output circuits) the ICs offer an
extremely advanced system solution.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
V_P
I_P
V_{i sync}
positive supply voltage (pin 1)
supply current
AC-coupled composite video signal with negative-going sync
(peak-to-peak value, pin 9)
sync slicing level
DC-coupled TTL-compatible horizontal sync signal (peak-to-peak value,
pin 9)
slicing level
DC-coupled TTL-compatible vertical sync signal (peak-to-peak value,
pin 10)
slicing level
I_{o V}
I_{o H}
T_amb
vertical differential output current (peak-to-peak value, pins 5 and 6)
horizontal sink output current on pin 3
operating ambient temperature range
MIN. TYP. MAX. UNIT
9.2 12 16
V
− 40 −
mA
−1−
V
− 120 −
mV
1.7 − −
V
1.2 1.4 1.6 V
1.7 − −
V
1.2 1.4 1.6 V
−1−
mA
− − 60
mA
0 − +70 °C
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
PINS
TDA4851
20
Note
1. SOT146-1; 1996 November 26.
PIN POSITION
DIL
PACKAGE
MATERIAL
plastic
CODE
SOT146⁽¹⁾
November 1992
2