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PDF 74VCXH162373 Data sheet ( Hoja de datos )
| Número de pieza | 74VCXH162373 | |
| Descripción | Low Voltage 16-Bit Transparent Latch with Bushold and 26 Series Resistors in Outputs | |
| Fabricantes | Fairchild Semiconductor | |
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January 2000
Revised March 2000
74VCXH162373
Low Voltage 16-Bit Transparent Latch with Bushold
and 26Ω Series Resistors in Outputs
General Description
The VCXH162373 contains sixteen non-inverting latches
with 3-STATE outputs and is intended for bus oriented
applications. The device is byte controlled. The flip-flops
appear to be transparent to the data when the Latch enable
(LE) is HIGH. When LE is LOW, the data that meets the
setup time is latched. Data appears on the bus when the
Output Enable (OE) is LOW. When OE is HIGH, the out-
puts are in a high impedance state.
The VCXH162373 data inputs include active bushold cir-
cuitry, eliminating the need for external pull-up resistors to
hold unused or floating data inputs at a valid logic level.
The VCXH162373 is also designed with 26Ω series resis-
tors in the outputs. This design reduces line noise in appli-
cations such as memory address driver, clock drivers and
bus transceivers/transmitters.
The 74VCXH162373 is designed for low voltage (1.65V to
3.6V) VCC applications with output compatibility up to 3.6V.
The 74VCXH162373 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s 1.65V–3.6V VCC supply operation
s 3.6V tolerant control inputs and outputs
s Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
s 26Ω series resistors in outputs
s tPD (In to On)
3.3 ns max for 3.0V to 3.6V VCC
4.5 ns max for 2.3V to 2.7V VCC
9.0 ns max for 1.65V to 1.95V VCC
s Static Drive (IOH/IOL)
±12 mA @ 3.0V VCC
±8 mA @ 2.3V VCC
±3 mA @ 1.65V VCC
s Uses patented noise/EMI reduction circuitry
s Latch-up performance exceeds 300 mA
s ESD performance:
Human body model > 2000V
Machine model > 200V
Ordering Code:
Ordering Number
Package
Number
Package Description
74VCXH162373MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TUBES]
74VCXH162373MTX
(Note 1)
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TAPE and REEL]
Note 1: Use this Order Number to receive devices in Tape and Reel.
Logic Symbol
Pin Descriptions
Pin Names
OEn
LEn
I0–I15
O0–O15
Description
Output Enable Input (Active LOW)
Latch Enable Input
Bushold Inputs
Outputs
© 2000 Fairchild Semiconductor Corporation DS500227
www.fairchildsemi.com
1 page  
AC Electrical Characteristics (Note 14)
T A = −40°C to +85°C, CL = 30 pF, RL = 500Ω
Symbol
Parameter
V CC = 3.3V ± 0.3V
V CC = 2.5V ± 0.2V
V CC = 1.8V ± 0.15V
Units
Min Max Min Max Min Max
tPHL, tPLH Prop Delay In to On
0.8 3.3 1.0 4.5 1.5 9.0 ns
tPHL, tPLH Prop Delay LE to On
0.8 3.6 1.0 4.9 1.5 9.8 ns
tPZL, tPZH Output Enable Time
0.8 3.9 1.0 5.4 1.5 9.8 ns
tPLZ, tPHZ Output Disable Time
0.8 4.0 1.0 4.4 1.5 7.9 ns
tS Setup Time
1.5 1.5 2.5
ns
tH Hold Time
1.0 1.0 1.0
ns
tW Pulse Width
1.5 1.5 4.0 ns
tOSHL
tOSLH
Output to Output Skew
(Note 15)
0.5 0.5 0.75 ns
Note 14: For CL = 50PF, add approximately 300 ps to the AC maximum specification.
Note 15: 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
V CC
(V)
1.8
2.5
3.3
1.8
2.5
3.3
1.8
2.5
3.3
TA = +25°C
Typical
0.15
0.25
0.35
−0.15
−0.25
−0.35
1.55
2.05
2.65
Units
V
V
V
Capacitance
Symbol
Parameter
CIN
COUT
CPD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Conditions
VCC = 1.8V, 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
TA = +25°C
Typical
6
7
20
Units
pF
pF
pF
5 www.fairchildsemi.com
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| PDF Descargar | [ Datasheet 74VCXH162373.PDF ] | |
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