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PI74LVCC3245A Datasheet(PDF) 6 Page - Pericom Semiconductor Corporation

Part No. PI74LVCC3245A
Description  8-Bit Dual Supply Bus Transceiver with Configurable Output Voltage and 3-State Outputs
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Maker  PERICOM [Pericom Semiconductor Corporation]
Homepage  http://www.pericom.com
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PI74LVCC3245A Datasheet(HTML) 6 Page - Pericom Semiconductor Corporation

 
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PI74LVCC3245A
8-Bit Dual Supply Bus Transceiver with
Configurable Output Voltage and 3-State Outputs
6
PS8702A
09/10/03
PARAMETER MEASUREMENT INFORMATION FOR A TO B PORT
VCCA =2.7V TO 3.6V and VCCB = 5V ± 0.5V
Load Circuit
Voltage Waveforms
Propagation Delay Times
Voltage Waveforms
Enable and Disable Times
Notes:
A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
500Ω
500
2xVCCB
Open
GND
S1
From Output
Under Test
CL = 50pF
(See Note A)
500Ω
500Ω
50
Input
tPLH
tPHL
0V
B-Port
Output
VOH
VOL
1.5V
1.5V
2.7V
50% VCCB
50% VCCB
tPZL
Output
Control
0V
1.5V
50% VCCB
1.5V
tPLZ
tPHZ
VOL
VCCB
0V
tPZH
+0.3V
–0.3V
Output
Waveform 1
S1 at 2 x VCCB
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOH
VOH
VOL
2.7V
50% VCCB
Power- Up Considerations
To avoid excessive supply current, bus contention or oscillation during power-up, the following guidelines should be followed:
1. Connect ground first before any supply voltage is applied.
2. Power up VCCA, which is the control side of the device.
3. Ramp OE ahead of or with VCCA to help prevent bus contention
4. Ramp DIR with VCCA if DIR high is needed (A bus to B bus). Otherwise keep DIR Low.
Test
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2 x VCCB
GND


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