September 2006
PCS2P5T915A
rev 0.2
AC Electrical Characteristics Over Operating Range5
Symbo
Parameter
Min
Typ
Max
Unit
l
Skew Parameters
Single-Ended and Differential
25
Same Device Output
Pin-to-Pin Skew1
Modes
tSK(O)
tSK(INV)
tSK(P)
pS
pS
pS
Single-Ended in Differential
Mode (DSE)
25
Single-Ended and Differential
Modes
300
300
Inverting Skew2
Pulse Skew3
Single-Ended in Differential
Mode (DSE)
300
300
Single-Ended and Differential
Modes
Single-Ended in Differential
Mode (DSE)
Single-Ended and Differential
Modes
300
tSK(PP)
Part-to-Part Skew4
pS
Single-Ended in Differential
Mode (DSE)
300
HSTL and eHSTL Differential True and Complementary
VOX
VDDQ/2 - 200
VDDQ/2
VDDQ/2 + 200
mV
Output Crossing Voltage Level
Propagation Delay
Propagation Delay A to
2.5V / 1.8V LVTTL Outputs
2.5
2
tPLH
tPHL
nS
pS
Qn/Qn
HSTL / eHSTL Outputs
2.5V /1.8V LVTTL Outputs
HSTL / eHSTL Outputs
2.5V /1.8V LVTTL Outputs
HSTL / eHSTL Outputs
Output Rise Time
(20% to 80%)
350
350
350
350
1050
1350
1050
1350
250
200
tR
tF
fO
Output Fall Time
(20% to 80%)
pS
Frequency Range (HSTL/eHSTL outputs)
Frequency Range (2.5V/1.8V LVTTL outputs)
MHz
Output Gate Enable/Disable Delay
Output Gate Enable to Qn/Qn
tPGE
3.5
3
nS
nS
Output Gate Enable to Qn/Qn Driven to GL Designated
Level
tPGD
Notes: 1. Skew measured between all outputs or output pairs under identical input and output interfaces, transitions and load conditions on any one device. For
single ended and differential LVTTL outputs, this measurement is made when each output voltage passes through VDDQ/2. For differential LVTTL
outputs, the true outputs are compared only with other true outputs and the complementary outputs are compared only with other complementary
outputs. For differential HSTL outputs, the measurement takes place at the crossing point of the true and complementary signals.
2. For operating with either 1.8V or 2.5V LVTTL output interfaces with both true and complementary outputs enabled. Inverting skew is the skew between
true and complementary outputs switching in opposite directions under identical input and output interfaces, transitions and load conditions on any one
device.
3. Skew measured is the difference between propagation delay times tPHL and tPLH of any output or output pair under identical input and output interfaces,
transitions and load conditions on any one device. For single ended and differential LVTTL outputs, this measurement is made when each output
voltage passes through VDDQ/2. The measurement applies to both true and complementary signals. For differential HSTL outputs, the measurement
takes place at the crossing point of the true and complementary signals.
4. Skew measured is the magnitude of the difference in propagation times between any outputs or output pairs of two devices, given identical transitions
and load conditions at identical VDD/VDDQ levels and temperature.
5. Guaranteed by design.
Low Voltage (2.5V) High Accuracy 1:5 Clock Fan-Out Buffer
13 of 23
Notice: The information in this document is subject to change without notice.
PULSECORE [ PulseCore Semiconductor ]
