SN74ALVCHG162280_08 Datasheet, PDF (1/13 Pages) Texas Instruments – 16-BIT TO 32-BIT REGISTERED BUS EXCHANGER WITH BYTE MASKS AND 3-STATE OUTPUTS

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FEATURES
• Member of the Texas Instruments Widebus™
Family
• EPIC™ (Enhanced-Performance Implanted
CMOS) Sub-Micron Process
• A-Port Outputs Have Equivalent 50-Ω Series
Resistors and B-Port Outputs Have Equivalent
20-Ω Series Resistors, So No External
Resistors Are Required
• 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
• Packaged in Thin Very Small-Outline Package
NOTE: For order entry, the DBB package is abbreviated to G. For
tape and reel, the DBBR package is abbreviated to GR.
DESCRIPTION
The SN74ALVCHG162280 is a 16-bit to 32-bit
registered bus exchanger. This device is intended for
use in applications where data must be transferred
from a narrow high-speed bus to a wide
lower-frequency bus. It is designed specifically for
low-voltage (3.3-V) V_CC operation.
The device provides synchronous data exchange
between the two ports, A and B. Data is stored in the
internal registers on the low-to-high transition of the
clock (CLK) input. For data transfer in the B-to-A
direction, the select (SEL) input selects 1B or 2B data
for the A outputs.
For data transfer in the A-to-B direction, a two-stage
pipeline is provided in the 1B path, with a single
storage register in the 2B path. Data flow is controlled
by the active-low output-enable (OE) and
direction-control (DIR) inputs. DIR is registered to
synchronize the bus direction changes with the clock.
Two mask bits are provided for both data bytes. The
data (D) outputs are controlled by OE.
SN74ALVCHG162280
16-BIT TO 32-BIT REGISTERED BUS EXCHANGER
WITH BYTE MASKS AND 3-STATE OUTPUTS
SCES093D – FEBRUARY 1997 – REVISED OCTOBER 2004
DBB PACKAGE
(TOP VIEW)
V_CC 1
GND 2
2B7 ³
1B7 4
2B6 5
GND 6
1B6 7
2B5 ⁸
1B5 ⁹
V_CC ¹⁰
2B4 11
1B4 12
2B3 13
1B3 ¹⁴
GND ¹⁵
2B2 ¹⁶
1B2 ¹⁷
2B1 18
1B1 ¹⁹
V_CC ²⁰
GND ²¹
2D2 ²²
1D2 ²³
2D1 ²⁴
1D1 ²⁵
V_CC ²⁶
C1 ²⁷
C2 ²⁸
A1 ²⁹
GND ³⁰
A2 ³¹
A3 ³²
A4 ³³
V_CC ³⁴
A5 ³⁵
A6 ³⁶
A7 ³⁷
GND ³⁸
CLK ³⁹
SEL ⁴⁰
80 V_CC
79 GND
78 _1B8
77 2B8
76 1B9
75 GND
74 2B9
73 _1B10
72 _2B10
71 _VCC
70 1B11
69 2B11
68 1B12
67 _2B12
66 _GND
65 _1B13
64 _2B13
63 1B14
62 _2B14
61 _VCC
60 _GND
59 _1B15
58 _2B15
57 _1B16
56 _2B16
55 _VCC
54 _A16
53 _A15
52 _A14
51 _GND
50 _A13
49 _A12
48 _A11
47 _VCC
46 _A10
45 _A9
44 _A8
43 _GND
42 _OE
41 _DIR
xxxx
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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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