13
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T1845/55/65/75/85/95/105/115/125 2.5V TeraSync™ 18-BIT/9-BIT FIFO
2Kx18/4Kx9, 4Kx18/
8Kx9, 8Kx18/16Kx9, 16Kx18/32Kx9, 32Kx18/64Kx9, 64Kx18/128Kx9, 128Kx18/256Kx9, 256Kx18/512Kx9, 512Kx18/1Mx9
FEBRUARY 10, 2009
AC ELECTRICAL CHARACTERISTICS ⎯ ASYNCHRONOUS TIMING
(Commercial: VCC = 2.5V ± 5%, TA = 0°C to +70°C;Industrial: VCC = 2.5V ± 5%, TA = -40°C to +85°C)
Commercial Com’l & Ind’l
(2)
Commercial Commercial
IDT72T1845L4-4 IDT72T1845L5 IDT72T1845L6-7
IDT72T1855L4-4 IDT72T1855L5 IDT72T1855L6-7
IDT72T1865L4-4 IDT72T1865L5 IDT72T1865L6-7
IDT72T1875L4-4 IDT72T1875L5 IDT72T1875L6-7
IDT72T1885L4-4 IDT72T1885L5 IDT72T1885L6-7
IDT72T1895L4-4 IDT72T1895L5 IDT72T1895L6-7
IDT72T18105L4-4 IDT72T18105L5 IDT72T18105L6-7 IDT72T18105L10
IDT72T18115L4-4 IDT72T18115L5 IDT72T18115L6-7 IDT72T18115L10
IDT72T18125L4-4 IDT72T18125L5 IDT72T18125L6-7 IDT72T18125L10
Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit
fA Cycle Frequency (Asynchronous) — 100 — 83 — 66 — 50 MHz
tAA Data Access Time 0.6 8 0.6 10 0.6 12 0.6 14 ns
tCYC Cycle Time 10 — 12 — 15 — 20 — ns
tCYH Cycle HIGH Time 4.5 — 5 — 7 — 8 — ns
tCYL Cycle LOW Time 4.5 — 5 — 7 — 8 — ns
tRPE Read Pulse after EF HIGH 8 — 10 — 12 — 14 — ns
tFFA Clock to Asynchronous FF — 8— 10—12—14ns
tEFA Clock to Asynchronous EF — 8— 10—12—14ns
tPAFA Clock to Asynchronous Programmable Almost-Full Flag — 8 — 10 — 12 — 14 ns
tPAEA Clock to Asynchronous Programmable Almost-Empty Flag — 8 — 10 — 12 — 14 ns
tOLZ Output Enable to Output in Low Z
(3)
0—0—0—0—ns
tOE Output Enable to Output Valid — 3.4 — 3.6 — 3.8 — 4.5 ns
tOHZ Output Enable to Output in High Z
(3)
— 3.4 — 3.6 — 3.8 — 4.5 ns
tHF Clock to HF — 8— 10—12—14ns
NOTES:
1. All AC timings apply to both Standard IDT mode and First Word Fall Through mode.
2. Industrial temperature range product for the 5ns speed grade is available as a standard device. All other speed grades are available by special order.
3. Values guaranteed by design, not currently tested.
