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Fairchild Semiconductor |
October 1991
Revised November 1999
100310
Low Skew 2:8 Differential Clock Driver
General Description
The 100310 is a low skew 8-bit differential clock driver
which is designed to select between two separate differen-
tial clock inputs. The low output to output skew (< 50 ps) is
maintained for either clock input. A LOW on the select pin
(SEL) selects CLKINA, CLKINA and a HIGH on the SEL
pin selects the CLKINB, CLKINB inputs.
The 100310 is ideal for those applications that need the
ability to freely select between two clocks, or to maintain
the ability to switch to an alternate or backup clock should a
problem arise with the primary clock source.
A VBB output is provided for single-ended operation.
Features
s Low output to output skew
s Differential inputs and outputs
s Allows multiplexing between two clock inputs
s Voltage compensated operating range: −4.2V to −5.7V
s Available to industrial grade temperature range
(PLCC package only)
Ordering Code:
Order Number Package Number
Package Description
100310QC
V28A
28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
100310QI
V28A
28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
Industrial Temperature Range (−40°C to +85°C)
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
28-Pin PLCC
Pin Descriptions
Pin Names
CLKINn, CLKINn
SEL
CLK0–7, CLK0–8
VBB
NC
Description
Differential Clock Inputs
Select
Differential Clock Outputs
VBB Output
No Connect
Truth Table
CLKINA CLKINA CLKINB CLKINB SEL CLKn CLKn
H L X X LH L
L H X X LL H
X X H L HH L
X X L H HL H
© 1999 Fairchild Semiconductor Corporation DS010943
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Absolute Maximum Ratings(Note 1)
Storage Temperature (TSTG)
Maximum Junction Temperature (TJ)
Pin Potential to Ground Pin (VEE)
Input Voltage (DC)
Output Current (DC Output HIGH)
ESD (Note 2)
−65°C to +150°C
+150°C
−7.0V to +0.5V
VEE to +0.5V
−50 mA
≥2000V
Commercial Version
Recommended Operating
Conditions
Case Temperature (TC)
Commercial
0°C to +85°C
Industrial
−40°C to +85°C
Supply Voltage (VEE)
−5.7V to −4.2V
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum rating.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Note 2: ESD testing conforms to MIL-STD-883, Method 3015.
DC Electrical Characteristics (Note 3)
VEE = −4.2V to −5.7V, VCC = VCCA = GND, TC = 0°C to +85°C
Symbol
Parameter
Min Typ
Max Units
Conditions
VOH Output HIGH Voltage
−1025
−955
−870
mV VIN = VIH (Max)
Loading with
VOL Output LOW Voltage
−1830
−1705
−1620
mV or VIL (Min)
50Ω to −2.0V
VOHC
Output HIGH Voltage
−1035
mV VIN = VIH
Loading with
VOLC
Output LOW Voltage
−1610
mV or VIL (Max)
50Ω to −2.0V
VBB Output Reference Voltage
−1380
−1320
−1260
mV IVBB = −250 µA
VDIFF
Input Voltage Differential
150
mV Required for Full Output Swing
VCM Common Mode Voltage
VCC − 2.0
VCC − 0.5
V
VIH Input HIGH Voltage
−1165
−870
mV Guaranteed HIGH Signal for All Inputs
VIL Input LOW Voltage
−1830
−1475
mV Guaranteed LOW Signal for All Inputs
IIL Input LOW Current
0.50
µA VIN = VIL (Min)
IIH Input HIGH Current
240 µA VIN = VIH (Max)
ICBO
Input Leakage Current
−10
µA VIN = VEE
IEE Power Supply Current
−100
−40 mA Inputs Open
Note 3: The specified limits represent the “worst case” value for the parameter. Since these values normally occur at the temperature extremes, additional
noise immunity and guardbanding can be achieved by decreasing the allowable system operating ranges. Conditions for testing shown in the tables are cho-
sen to guarantee operation under “worst case” conditions.
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