The Tánaiste Eamon Gilmore has refused to comment on reports that he told German chancellor Angela Merkel the Fine Gael-Labour coalition would not survive without a deal on the promissory notes.
Pressure is intensifying to secure a deal on Ireland's bank debt before the end of March, when the next €3.1bn payment is due.
The European Central Bank recently rejected the Government's preferred option of replacing the Anglo promissory note with a long-term bond.
The Government is understood to be increasing pressure at EU level to secure a deal.
Eamon Gilmore said the issue was now at a crucial stage, and that the Government was "seeking to secure the best deal possible for the Irish Government and the Irish taxpayer".
On whether failure to secure a deal would topple the Government, he said: "The future of the Irish Government is a matter for the Irish Government and the Irish people."