SN74ALVCH16260_08 Datasheet, PDF (1/15 Pages) Texas Instruments – 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH WITH 3-STATE OUTPUTS

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FEATURES
• Member of the Texas Instruments Widebus™
Family
• EPIC™ (Enhanced-Performance Implanted
CMOS) Submicron Process
• ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Package Options Include Plastic Shrink
Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages
DESCRIPTION
This 12-bit to 24-bit multiplexed D-type latch is
designed for 1.65-V to 3.6-V V_CC operation.
The SN74ALVCH16260 is used in applications in
which two separate data paths must be multiplexed
onto, or demultiplexed from, a single data path.
Typical applications include multiplexing and/or
demultiplexing address and data information in
microprocessor or bus-interface applications. This
device also is useful in memory-interleaving
applications.
Three 12-bit I/O ports (A1-A12, 1B1-1B12, and
2B1-2B12) are available for address and/or data
transfer. The output-enable (OE1B, OE2B, and OEA)
inputs control the bus transceiver functions. The
OE1B and OE2B control signals also allow bank
control in the A-to-B direction.
SN74ALVCH16260
12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES046G – JULY 1995 – REVISED OCTOBER 2004
DGG OR DL PACKAGE
(TOP VIEW)
OEA 1
LE1B 2
2B3 3
GND 4
2B2 5
2B1 6
V_CC 7
A1 8
A2 9
A3 10
GND 11
A4 12
A5 13
A6 14
A7 15
A8 16
A9 17
GND 18
A10 19
A11 20
A12 21
V_CC 22
1B1 23
1B2 24
GND 25
1B3 26
LE2B 27
SEL 28
56 OE2B
55 LEA2B
54 2B4
53 GND
52 2B5
51 2B6
50 V_CC
49 2B7
48 2B8
47 2B9
46 GND
45 2B10
44 2B11
43 2B12
42 1B12
41 1B11
40 1B10
39 GND
38 1B9
37 1B8
36 1B7
35 V_CC
34 1B6
33 1B5
32 GND
31 1B4
30 LEA1B
29 OE1B
Address and/or data information can be stored using the internal storage latches. The latch-enable (LE1B, LE2B,
LEA1B, and LEA2B) inputs are used to control data storage. When the latch-enable input is high, the latch is
transparent. When the latch-enable input goes low, the data present at the inputs is latched and remains latched
until the latch-enable input is returned high.
To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH16260 is characterized for operation from -40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus, EPIC are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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