Fairchild Semiconductor 100310QIX, 100310QI, 100310QCX, 100310QC Datasheet
© 1999 Fairchild Semiconductor Corporation DS010943 www.fairchildsemi.com
October 1991
Revised November 1999
100310 Low Skew 2:8 Differential Clock Driver
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 sep arate differe ntial clock inputs. The lo w ou tpu t to ou tput skew (< 50 ps) is
maintained for either clock input. A LOW on the sele ct pin
(SEL) selects CLKINA, CLKINA
and a HIGH on th e SEL
pin selects the CLKINB, CLKINB
inputs.
The 100310 is ideal for tho se 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 V
BB
output is provided for single-ended operation.
Features
■ Low output to output skew
■ Differential inputs and outputs
■ Allows multiplexing between two clock inputs
■ Voltage compensated operating range: −4.2V to −5.7V
■ Available to industrial grade temperature range
(PLCC package only)
Ordering Code:
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
28-Pin PLCC
Truth T able
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)
Pin Names Description
CLKIN
n
, CLKIN
n
Differential Clock Inputs
SEL Select
CLK
0–7
, CLK
0–8
Differential Clock Outputs
V
BB
VBB Output
NC No Connect
CLKINA CLKINA CLKINB CLKINB SEL
CLK
n
CLK
n
HLXXLHL
LHXXLLH
XXHLHHL
XXLHHLH
www.fairchildsemi.com 2
100310
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: The “Absolute Maximum Ratings” are those values beyon d which
the safety of the dev ice cannot be guaranteed. T he device sh ould not be
operated at these limit s. The parametric values defin ed in the Electrical
Characteristics tables are not guaranteed at the absolute maximum rating.
The “Recomme nded O peratin g Cond itions ” table will defin e the condition s
for actual device operation.
Note 2: ESD testing conf orm s t o M I L-STD-883, Method 3015.
Commercial Version
DC Electrical Characteristics
(Note 3)
V
EE
= −4.2V to −5.7V, VCC = V
CCA
= GND, TC = 0°C to +85°C
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 all owable syste m opera ti ng r ange s. Co ndi ti ons fo r t est ing shown in the ta ble s are chosen to guarantee operation under “worst case” conditions.
Storage Temperature (T
STG
) −65°C to +150°C
Maximum Junction Temperature (T
J
) +150°C
Pin Potential to Ground Pin (V
EE
) −7.0V to +0.5V
Input Voltage ( DC) V
EE
to +0.5V
Output Current (DC Output HIGH) −50 mA
ESD (Note 2) ≥2000V
Case Temperature (T
C
)
Commercial 0°C to +85°C
Industrial −40°C to +85°C
Supply Voltage ( V
EE
) −5.7V to −4.2V
Symbol Parameter Min Typ Max Units Conditions
V
OH
Output HIGH Voltage −1025 −955 −870 mV VIN = VIH (Max) Loading with
V
OL
Output LOW Voltage −1830 −1705 −1620 mV or VIL (Min) 50Ω to −2.0V
V
OHC
Output HIGH Voltage −1035 mV VIN = VIH Loading with
V
OLC
Output LOW Voltage −1610 mV or VIL (Max) 50Ω to −2.0V
V
BB
Output Reference Voltage −1380 −1320 −1260 mV I
VBB
= −250 µA
V
DIFF
Input Voltage Differential 150 mV Required for Full Output Swing
V
CM
Common Mode Voltage VCC − 2.0 VCC − 0.5 V
V
IH
Input HIGH Voltage −1165 −870 mV Guaranteed HIGH Signal for All Inputs
V
IL
Input LOW Voltage −1830 −1475 mV Guaranteed LOW Signal for All Inputs
I
IL
Input LOW Current 0.50 µAVIN = VIL (Min)
I
IH
Input HIGH Current 240 µAVIN = VIH (Max)
I
CBO
Input Leakage Current −10 µAVIN = V
EE
I
EE
Power Supply Current −100 −40 mA Inputs Open
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