DS3245 Clock Driver Datasheet

DS3245 Datasheet, PDF, Equivalent


Part Number

DS3245

Description

Quad MOS Clock Driver

Manufacture

National Semiconductor

Total Page 5 Pages
Datasheet
Download DS3245 Datasheet


DS3245
February 1986
DS3245 Quad MOS Clock Driver
General Description
The DS3245 is a quad bipolar-to-MOS clock driver with TTL
compatible inputs It is designed to provide high output cur-
rent and voltage capabilities necessary for optimum driving
of high capacitance N-channel MOS memory systems
Only 2 supplies 5 VDC and 12 VDC are required without
compromising the usual high VOH specification obtained by
circuits using a third supply
The device features 2 common enable inputs a refresh in-
put and a clock control input for simplified system designs
The circuit was designed for driving highly capacitive loads
at high speeds and uses Schottky-clamped transistors PNP
transistors are used on all inputs thereby minimizing input
loading
Features
Y TTL compatible inputs
Y Operates from 2 standard supplies 5 VDC 12 VDC
Y Internal bootstrap circuit eliminates need for external
PNP’s
Y PNP inputs minimize loading
Y High voltage current outputs
Y Input and output clamping diodes
Y Control logic optimized for use with MOS memory sys-
tems
Y Pin and function equivalent to Intel 3245
Logic and Connection Diagrams
Dual-In-Line Package
TL F 5873 – 1
Top View
TL F 5873 – 2
Order Number DS3245J or DS3245N
See NS Package Number J16A or N16A
C1995 National Semiconductor Corporation TL F 5873
RRD-B30M115 Printed in U S A

DS3245
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Temperature Under Bias
b10 C to a85 C
Storage Temperature
b65 C to a150 C
Supply Voltage VCC
Supply Voltage VDD
All Input Voltages
Outputs for Clock Driver
Maximum Power Dissipation
Cavity Package
Molded Package
at 25 C
b0 5V to a7V
b0 5V to a14V
b1 0V to VDD
b1 0V to VDD a 1V
1509 mW
1476 mW
Derate cavity package 10 1 mW C above 25 C derate molded package
11 8 mW C above 25 C
Operating Conditions
Min Max Units
Supply Voltage VCC
4 75 5 25
Supply Voltage VDD
11 4 12 6
Operating Temperature 9TA
0
75
V
V
C
Electrical Characteristics (Notes 2 and 3)
Symbol
IFD
IFE
IRD
IRE
VOL
VOH
VIL
VIH
VCLAMP
Parameter
Select Input Load Current
Enable Input Load Current
Select Input Leakage Current
Enable Input Leakage Current
Output Low Voltage
Output High Voltage
Input Low Voltage All Inputs
Input High Voltage All Inputs
Input Clamp Voltage
Conditions
VF e 0 45V
VF e 0 45V
VR e 5V
VR e5V
IOL e 5 mA VIH e 2V
IOL e b5 mA
IOH e b1 mA VIL e 0 8V
IOH e 5 mA
VCC e Min IIN e b12 mA
Min
b1 0
VDD b 0 50
2
Typ
b1 0
Max
b0 25
b1 0
10
40
0 45
VDD a 1 0
08
b1 5
Units
mA
mA
mA
mA
V
V
V
V
V
V
V
Power Supply Current Drain
Symbol
Parameter
Conditions
Min Typ Max Units
ICC
Current from VCC
VCC e 5 25V
Output in High State
VDD e 12 6V
26 34 mA
IDD
Current from VDD
VCC e 5 25V
Output in High State
VDD e 12 6V
23 30 mA
ICC
Current from VCC
VCC e 5 25V
Output in Low State
VDD e 12 6V
29 39 mA
IDD
Current from VDD
VCC e 5 25V
Output in Low State
VDD e 12 6V
13 19 mA
Note 1 ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed Except for ‘‘Operating Temperature Range’’
they are not meant to imply that the devices should be operated at these limits The table of ‘‘Electrical Characteristics’’ provides conditions for actual device
operation
Note 2 Unless otherwise specified min max limits apply across the 0 C to a C range All typical values are for TA e 25 C and VCC e 5V and VDD e 12V
Note 3 All currents into device pins shown as positive out of device pins as negative all voltages referenced to ground unless otherwise noted All values shown
as max or min on absolute value basis
2


Features DS3245 Quad MOS Clock Driver February 1 986 DS3245 Quad MOS Clock Driver Gene ral Description The DS3245 is a quad bi polar-to-MOS clock driver with TTL comp atible inputs It is designed to provide high output current and voltage capabi lities necessary for optimum driving of high capacitance N-channel MOS memory systems Only 2 supplies 5 VDC and 12 VD C are required without compromising the usual high VOH specification obtained by circuits using a third supply The de vice features 2 common enable inputs a refresh input and a clock control input for simplified system designs The circ uit was designed for driving highly cap acitive loads at high speeds and uses S chottky-clamped transistors PNP transis tors are used on all inputs thereby min imizing input loading Features Y TTL c ompatible inputs Y Operates from 2 stan dard supplies 5 VDC 12 VDC Y Internal b ootstrap circuit eliminates need for ex ternal PNP’s Y PNP inputs minimize lo ading Y High voltage current outputs Y Input and output clamping .
Keywords DS3245, datasheet, pdf, National Semiconductor, Quad, MOS, Clock, Driver, S3245, 3245, 245, DS324, DS32, DS3, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




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