SN28838 Datasheet, PDF (1/5 Pages) Texas Instruments – PAL-COLOR SUBCARRIER GENERATOR

• Solid-State Reliability
• Surface-Mount Package
description
The SN28838 is a monolithic integrated circuit
designed to interface with the SN28837 PAL-
timing generator in order to generate the
PAL-color timing signals. It receives inputs from
the SN28837 and a 17-MHz oscillator and outputs
the PAL-color subcarrier, color subcarrier delayed
by 90 degrees, and burst-color-subcarrier signals,
which are all 4.43-MHz outputs.
The SN28838 is supplied in a 16-pin surface-
mount package and is characterized for operation
from 0°C to 40°C.
logic symbol
SN28838
PAL-COLOR SUBCARRIER GENERATOR
SOCS029B – AUGUST 1991
NS PACKAGE
(TOP VIEW)
GND 1
V_DD1 2
PD 3
LSW 4
V_CC 5
GND 6
CLK13M 7
V_DD2 8
16 X1
15 X2
14 V_CC
13 LOCK
12 PLLFIL
11 BSC
10 SC(90)
9 SC
3
PD
4
LSW
7
CLK13M
15
X2
16
X1
PAL CLR SUBCARR GEN
SN28838
LSW SC (90) BSC
H SC – 90° SC – 90°
L SC + 90° SC + 180°
Pwr Dwn
Phase Del
Clock
Xtal
Lock
Xtal
G
SC
G
SC (90)
G
BSC
13
LOCK
9
SC
10
SC (90)
11
BSC
This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These
circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C,
Method 3015; however, precautions should be taken to avoid application of any voltage higher than maximum-rated voltages to these
high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in
conductive foam. In a circuit, unused inputs should always be connected to an appropriate logic voltage level, preferably either VCC or ground.
Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive
(ESDS) Devices and Assemblies available from Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1991, Texas Instruments Incorporated
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