Features
- 3.3V outputs: SDRAM, PCI, REF, 48/24MHz
- 2.5V outputs: CPU, IOAPIC
- 20 ohm CPU clock output impedance
- 20 ohm PCI clock output impedance
- Skew from CPU (earlier) to PCI clock - 1.5 to 4 ns, center 2.6 ns.
- No external load cap for CL=18pF crystals
- ±175 ps CPU clock skew
- 250ps (cycle to cycle) CPU jitter
- Smooth frequency switch, with selections from 66.8 to 150 MHz CPU.
- I2C interface for programming
- 3ms power up clock stable time
- Clock duty cycle 45-55%.
- 48 pin 300 mil SSOP package
- 3.3V operation, 5V tolerant inputs (with series R)
- 5ns propagation delay SDRAM from Buffer Input
Description
The IDT9248-39 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro or Cyrix. Eight different reference frequency multiplying factors are externally selectable with smooth frequency transitions.
| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Temp. Grade | Pb (Lead) Free | Carrier Type |
|---|---|---|---|---|---|---|---|---|
| 9248DF-39LF | Obsolete | N/A | Out of Stock | SSOP | 48# | C | Yes | Tube |
| 9248DF-39LFT | Obsolete | N/A | Out of Stock | SSOP | 48# | C | Yes | Reel |
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- Product Change NoticePDF 361 KB 7WDXRDKU4E7E-5-55130 Mar 24, 2013
- End Of Life NoticePDF 606 KB 7WDXRDKU4E7E-5-62524 Nov 29, 2017
- End Of Life NoticePDF 599 KB 7WDXRDKU4E7E-5-61808 Aug 24, 2017
- Product Change NoticePDF 35 KB 7WDXRDKU4E7E-5-59518 Oct 08, 2015
- Product Change NoticePDF 484 KB 7WDXRDKU4E7E-5-59181 Jul 02, 2015
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- End Of Life NoticePDF 606 KB 7WDXRDKU4E7E-5-62524 Nov 29, 2017
- End Of Life NoticePDF 599 KB 7WDXRDKU4E7E-5-61808 Aug 24, 2017
- Product Change NoticePDF 35 KB 7WDXRDKU4E7E-5-59518 Oct 08, 2015
- Product Change NoticePDF 484 KB 7WDXRDKU4E7E-5-59181 Jul 02, 2015
- Product Change NoticePDF 361 KB 7WDXRDKU4E7E-5-55130 Mar 24, 2013
Product Notices (PCN, EOL, etc) (5)
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