CDC208
DUAL 1-LINE TO 4-LINE CLOCK DRIVER
WITH 3-STATE OUTPUTS
SCAS109F – APRIL 1990 – REVISED OCTOBER 1998
DW PACKAGE
(TOP VIEW)
Low-Skew Propagation Delay
Specifications for Clock-Driver
Applications
1Y2
1Y3
1Y4
GND
GND
GND
GND
2Y1
1Y1
1A
1OE1
1OE2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
TTL-Compatible Inputs and
CMOS-Compatible Outputs
Flow-Through Architecture Optimizes
PCB Layout
V
CC
Center-Pin V
and GND Pin
CC
V
CC
Configurations Minimize High-Speed
Switching Noise
2A
2OE1
2OE2
2Y4
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
2Y2
2Y3
500-mA Typical Latch-Up Immunity at
125°C
Package Options Include Plastic
Small-Outline (DW)
description
The CDC208 contains dual clock-driver circuits that fanout one input signal to four outputs with minimum skew
for clock distribution (see Figure 2). The device also offers two output-enable (OE1 and OE2) inputs for each
circuit that can force the outputs to be disabled to a high-impedance state or to a high- or low-logic level
independent of the signal on the respective A input.
Skew parameters are specified for a reduced temperature and voltage range common to many applications.
The CDC208 is characterized for operation from –40°C to 85°C.
FUNCTION TABLES
INPUTS
OUTPUTS
1OE1 1OE2
1A
L
1Y1
L
1Y2
L
1Y3
L
1Y4
L
L
L
L
L
H
X
H
H
H
H
L
H
L
L
L
L
L
H
H
X
H
H
H
H
H
X
Z
Z
Z
Z
INPUTS
OUTPUTS
2OE1 2OE2
2A
L
2Y1
L
2Y2
L
2Y3
L
2Y4
L
L
L
L
L
H
X
H
H
H
H
L
H
L
L
L
L
L
H
H
X
H
H
H
H
H
X
Z
Z
Z
Z
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 1998, Texas Instruments Incorporated
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265