The Blades will find out their first round Carling Cup opponents at 9.30am next Tuesday (16th June).
All Football League clubs enter at the first round stage with the exception of Newcastle United and Middlesbrough, who have been given byes based on the number of teams England have in next season's Europa League.
The draw will again be split into Northern and Southern sections - each broken down into Seeds and Non-Seeds.
The seeding is based on last season's final league placings and seeded teams will be drawn against non-seeded clubs in their respective Northern or Southern section.
That rules out the possibility of meeting local Championship rivals Sheffield Wednesday, Barnsley and Doncaster, although Rotherham United, Bradford City and Chesterfield are all possible opponents.
First round ties will take place the week commencing 10th August, just a few days after the first league match of the new campaign.
The Coca-Cola Championship fixture list for 2009/10 will follow the next day (Wednesday 17th June) at 10am on sufc.co.uk
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The full Carling Cup seeding system is as follows:
Northern Seeded:
Barnsley, Blackpool, Coventry City, Derby County, Doncaster Rovers, Huddersfield Town, Leeds United, Leicester City, Nottingham Forest, Oldham Athletic, Preston North End, Scunthorpe United, Sheffield United, Sheffield Wednesday, Tranmere Rovers, Walsall, West Bromwich Albion.
North Unseeded:
Accrington Stanley, Bradford City, Bury, Carlisle United, Chesterfield, Crewe Alexandra, Darlington, Grimsby Town, Hartlepool United, Lincoln City, Macclesfield Town, Morecambe, Notts County, Port Vale, Rochdale, Rotherham United, Stockport County.
South Seeded:
Bristol City, Bristol Rovers, Cardiff City, Charlton Athletic, Colchester United, Crystal Palace, Ipswich Town, Millwall, MK Dons, Norwich City, Peterborough United, Plymouth Argyle, QPR, Reading, Southampton, Southend United, Swansea City, Watford.
South Unseeded:
AFC Bournemouth, Aldershot Town, Barnet, Brentford, Brighton & Hove Albion, Burton Albion, Cheltenham Town, Dagenham & Redbridge, Exeter City, Gillingham, Hereford United, Leyton Orient, Northampton Town, Shrewsbury Town, Swindon Town, Torquay United, Wycombe Wanderers, Yeovil Town.