PI74HSTL1212 Datasheet, PDF (4/5 Pages) Pericom Semiconductor Corporation – 24-Bit, 1.8V to 3.3V Bi_Directional Level Shifting Transcciver

PI74HSTL1212
24-Bit, 1.8V to 3.3V
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Parameter Measurement Information - B to A Direction
V_CCB = 3.3V±0.3V and V_CCA = 1.8V ±0.10V
From Output
Under Test
CL = 15pF
(See Note A)
Input
1000Ω
Output
Load Circuit
1.5V
tPLH
1.5V
tPHL
V_REF
VCCB
0V
VCCA-0.4V _Input
V_REF
0.4V
tW
1.5V
2.4V
1.5V
0.5V
Voltage Waveforms
Propagation Delay Times
Voltage Waveforms
Pulse Duration
Figure 1. Load Circuit and Voltage Waveforms
Parameter Measurement Information - A to B Direction
V_CCA = 1.8V ± 0.10V and V_CCB = 3.3V ± 0.3V
From Output ^VIN
Under Test
CL = 30pF
(see note A)
500Ω
Load Circuit
Input
tPLH
Output
VREF
1.5V
VCCA
VREF
tPHL
0V
V_OH
1.5V
VOL
Voltage Waveforms
Propagation Delay Times
Figure 2. Load Circuit and Voltage Waveforms
Output 1
0.5 x V_CC
Output 2
T_SK(0)
0.5 x V_CC
Figure 3. Opposite Edge Skew
Notes:
A. C_L 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 pulses are supplied by generators having the following characteristics: PRR ≤ 10Mz, Z_O = 50 ohms,
t_R ≤ 2.5ns, t_F ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t_PLZ and t_PHZ are the same as t_DIS.
F. t_PZL and t_PZH are the same as t_EN.
G. t_PLH and t_PHL are the same as t_PD.
4
PS8598
01/29/02