IDT74ALVCH162373 Datasheet, PDF (1/6 Pages) Integrated Device Technology – 3.3V CMOS 16-BIT TRANSPARENT D-TYPE LATCH WITH 3-STATE OUTPUTS AND BUS-HOLD

IDT74ALVCH162373
3.3V CMOS 16-BIT TRANSPARENT D-TYPE LATCH WITH 3-STATE OUTPUTS
3.3V CMOS 16-BIT TRANS-
PARENT D-TYPE LATCH
WITH 3-STATE OUTPUTS
AND BUS-HOLD
INDUSTRIAL TEMPERATURE RANGE
IDT74ALVCH162373
FEATURES:
• 0.5 MICRON CMOS Technology
• Typical tSK(o) (Output Skew) < 250ps
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
• VCC = 3.3V ± 0.3V, Normal Range
• VCC = 2.7V to 3.6V, Extended Range
• VCC = 2.5V ± 0.2V
• CMOS power levels (0.4µ W typ. static)
• Rail-to-Rail output swing for increased noise margin
• Available in SSOP and TSSOP packages
DRIVE FEATURES:
• Balanced Output Drivers: ±12mA
• Low switching noise
APPLICATIONS:
• 3.3V high speed systems
• 3.3V and lower voltage computing systems
DESCRIPTION:
This 16-bit transparent D-type latch is built using advanced dual metal CMOS
technology. The ALVCH162373 is particularly suitable for imple-menting buffer
registers, I/O ports, bidirectional bus drivers, and working registers. This device
can be used as two 8-bit latches or one16-bit latch. When the latch enable (LE)
input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the
Q outputs are latched at the levels set up at the D inputs.
A buffered output-enable (OE) can be used to place the eight outputs in either
a normal logic state (high or low logic levels) or a high-impedance state. In the
high-impedance state, the outputs neither load nor drive the bus lines signifi-
cantly. The high-impedance state and the increased drive provide the capability
to drive bus lines without need for interface or pullup components. OE does not
affect internal operations of the latch. Old data can be retained or new data can
be enetered while the outputs are in the high-impedance state.
The ALVCH162373 has series resistors in the device output structure which
will significantly reduce line noise when used with light loads. This driver has
been designed to drive ±12mA at the designated threshold levels.
The ALVCH162373 has “bus-hold” which retains the inputs’ last state
whenever the input goes to a high impedance. This prevents floating inputs and
eliminates the need for pull-up/down resistor.
FUNCTIONAL BLOCK DIAGRAM
1OE ¹
48
1LE
C1
1D1 ⁴⁷
1D
2OE ²⁴
2LE ²⁵
C1
2 _1Q1
2D1 ³⁶
1D
13 _2Q1
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 2004 Integrated Device Technology, Inc.
JANUARY 2004
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