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SSTV16859

2.5 V 13-bit to 26-bit SSTL_2 registered buffer for stacked DDR DIMM

Philips Electronics 

Philips Semiconductors

2.5 V 13-bit to 26-bit SSTL_2

registered buffer for stacked DDR DIMM

Product data

SSTV16859

AC WAVEFORMS

LVCMOS

RESET

VDD/2

VDD/2

VDD

tinact

tact

IDD

10%

90%

SW00752

Waveform 1. Inputs active and inactive times (see Note 1)

INPUT

tW

VREF

VREF

Waveform 2. Pulse duration

VIH

VIL

SW00753

LVCMOS RESET

Input

VIH

Output

VDD/2

tPHL

VIL

VOH

VTT

VOL

Waveform 4. Propagation delay times

SW00755

Timing input

VICR

VI(PP)

TIMING

INPUT

VICR

tPLH

OUTPUT

VICR

VI(PP)

tPHL

VOH

VTT

VOL

tsu

Input

VREF

th

VIH

VREF

VIL

Waveform 5. Setup and hold times

SW00756

SW00754

Waveform 3. Propagation delay times

NOTES:

1. IDD tested with clock and data inputs held at VDD or GND, and IO = 0 mA.

2. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, input slew rate = 1 V/ns ± 20%

(unless otherwise specified).

3. The outputs are measured one at a time with one transition per measurement.

4. VTT = VREF = VDD/2

5. VIH = VREF + 310 mV (ac voltage levels) for differential inputs. VIH = VDD for LVCMOS input.

6. VIL = VREF – 310 mV (ac voltage levels) for differential inputs. VIL = GND for LVCMOS input.

7. tPLH and tPHL are the same as tpd.

2002 Feb 19

10

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