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PDF 74VCX162827 Data sheet ( Hoja de datos )
| Número de pieza | 74VCX162827 | |
| Descripción | Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs and 26 Series Resistors in the Outputs | |
| Fabricantes | Fairchild Semiconductor | |
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March 1998
Revised April 1999
74VCX162827
Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant
Inputs and Outputs and 26Ω Series Resistors in the
Outputs
General Description
Features
The VCX162827 contains twenty non-inverting buffers with
3-STATE outputs to be employed as a memory and
address driver, clock driver, or bus oriented transmitter/
receiver. The device is byte controlled. Each byte has NOR
output enables for maximum control flexibility.
s 1.65V–3.6V VCC supply operation
s 3.6V tolerant inputs and outputs
s 26Ω series resistors in outputs
s tPD
The 74VCX162827 is designed for low voltage (1.65V to
3.6V) VCC applications with I/O capability up to 3.6V. The
VCX162827 is also designed with 26Ω resistors in the out-
puts.
The 74VCX162827 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
3.4 ns max for 3.0V to 3.6V VCC
4.1 ns max for 2.3V to 2.7V VCC
8.2 ns max for 1.65V to 1.95V VCC
s Power-off high impedance inputs and outputs
s Supports live insertion and withdrawal (Note 1)
s Static Drive (IOH/IOL)
±12 mA @ 3.0V VCC
±8 mA @ 2.3V VCC
±3 mA @ 1.65V VCC
www.DataSsheUet4sUe.csompatented noise/EMI reduction circuitry
s Latch-up performance exceeds 300 mA
s ESD performance:
Human body model > 2000V
Machine model > 200V
Note 1: To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pull-up resistor; the minimum
value of the resistor is determined by the current-sourcing capability of the
driver.
Ordering Code:
Order Number Package Number
Package Description
74VCX162827MTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix “X” to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names
OEn
I0–I19
O0–O19
Description
Output Enable Input (Active LOW)
Inputs
Outputs
© 1999 Fairchild Semiconductor Corporation DS500138.prf
www.fairchildsemi.com
1 page  
AC Electrical Characteristics (Note 8)
TA = −40°C to +85°C, CL = 30 pF, RL = 500Ω
Symbol
Parameter
VCC = 3.3V ± 0.3V
VCC = 2.5V ± 0.2V
VCC = 1.8V ± 0.15V
Units
Min Max Min Max Min Max
tPHL, tPLH Prop Delay
0.8 3.4 1.0 4.1 1.5 8.2 ns
tPZL, tPZH Output Enable Time
0.8 4.3 1.0 5.9 1.5 9.8 ns
tPLZ, tPHZ Output Disable Time
0.8 4.3 1.0 4.9 1.5 8.8 ns
tOSHL
tOSLH
Output to Output Skew
(Note 9)
0.5 0.5 0.75 ns
Note 8: For CL = 50 PF, add approximately 300 ps to the AC maximum specification.
Note 9: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol
Parameter
VOLP
Quiet Output Dynamic Peak VOL
VOLV
Quiet Output Dynamic Valley VOL
VOHV
Quiet Output Dynamic Valley VOH
Conditions
CL = 30 pF, VIH = VCC, VIL = 0V
CL = 30 pF, VIH = VCC, VIL = 0V
CL = 30 pF, VIH = VCC, VIL = 0V
VCC TA = +25°C Units
(V) Typical
1.8 0.15
2.5 0.25
V
3.3 0.35
1.8 −0.15
2.5 −0.25
V
3.3 −0.35
1.8 1.55
2.5 2.05
V
3.3 2.65
Capacitance
Symbol
Parameter
CIN
COUT
CPD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Conditions
TA = +25°C
Typical
VCC = 1.8, 2.5V or 3.3V, VI = 0V or VCC
VI = 0V or VCC, VCC = 1.8V, 2.5V or 3.3V
VI = 0V or VCC, f = 10 MHz, VCC = 1.8V, 2.5V or 3.3V
6
7
20
Units
pF
pF
pF
5 www.fairchildsemi.com
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