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參數(shù)資料
| 型號： | 935267931118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | AVC SERIES, 18 1-BIT DRIVER, TRUE OUTPUT, PDSO56 |
| 封裝： | 6.10 MM, PLASTIC, MO-153, SOT-364-1, TSSOP-56 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 116K |
| 代理商： | 935267931118 |
Philips Semiconductors
Product data
74AVC16834A
18-bit registered driver with inverted register enable
and Dynamic Controlled Outputs
(3-State)
2002 Sep 11
9
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
RT
VI
D.U.T.
VO
CL
VCC
RL
Test Circuit for switching times
Open
GND
S1
DEFINITIONS
VCC
VI
< 2.3 V
VCC
TEST
S1
tPLH/tPHL
Open
RL = Load resistor
CL = Load capacitance includes jig and probe capacitance
RT = Termination resistance should be equal to ZOUT of pulse generators.
2
< VCC
tPLZ/tPZL
VCC
2.3–2.7 V
tPHZ/tPZH
GND
RL
2 * VCC
SV01018
RL
1000
500
VCC
3.0 V
500
Waveform 7. Load circuitry for switching times
GRAPHS
SH00204
0
0.5
1
1.5
2
2.5
3
3.5
0
50
100
150
200
250
OUTPUT CURRENT (mA)
OUTPUT
VOL
T
AGE
(V)
= 3.3 V
V
OL
VCC
= 2.5 V
VCC
VCC = 1.8 V
I OL
Figure 1. Output voltage (VOL) vs. output current (IOL)
SH00205
–250
–200
–150
–100
–50
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
= 3.3 V
= 2.5 V
= 1.8 V
OUTPUT CURRENT (mA)
OUTPUT
VOL
T
AGE
(V)
V
OH
VCC
I OH
VCC
Figure 2. Output voltage (VOH) vs. output current (IOH)
A Dynamic Controlled Output (DCO) circuit is designed in. During
the transition, it initially lowers the output impedance to effectively
drive the load and, subsequently, raises the impedance to reduce
noise. Figures 1 and 2 show VOL vs. IOL and VOH vs. IOH curves to
illustrate the output impedance and drive capability of the circuit. At
the beginning of the signal transition, the DCO circuit provides a
maximum dynamic drive that is equivalent to a high drive standard
output device.
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