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SN74CBTK16245 Datasheet

16-Bit FET Bus Switch

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SN74CBTK16245
16-BIT FET BUS SWITCH
WITH ACTIVE-CLAMP UNDERSHOOT-PROTECTION CIRCUIT
SCDS105D – APRIL 2000 – REVISED NOVEMBER 2001
D Member of the Texas Instruments
Widebus Family
D Standard ’16245-Type Pinout
D 5-Switch Connection Between Two Ports
D TTL-Compatible Input Levels
D Ioff Supports Partial-Power-Down Mode
Operation
D Active-Clamp Undershoot-Protection
Circuit on the I/Os Clamps Undershoots up
to –2 V
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
description
The SN74CBTK16245 device provides 16 bits of
high-speed TTL-compatible bus switching in a
standard ’16245 device pinout. The low on-state
resistance of the switch allows connections to be
made with minimal propagation delay.
The A and B ports have an active-clamp
undershoot-protection circuit. When there is an
undershoot, the active-clamp circuit is enabled,
and current from VCC is supplied to clamp the
output, preventing the pass transistor from
turning on.
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
NC
1B1
1B2
GND
1B3
1B4
VCC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
VCC
2B5
2B6
GND
2B7
2B8
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48 1OE
47 1A1
46 1A2
45 GND
44 1A3
43 1A4
42 VCC
41 1A5
40 1A6
39 GND
38 1A7
37 1A8
36 2A1
35 2A2
34 GND
33 2A3
32 2A4
31 VCC
30 2A5
29 2A6
28 GND
27 2A7
26 2A8
25 2OE
NC – No internal connection
The device is organized as two 8-bit low-impedance switches with separate output-enable (OE) inputs. When OE is
low, the switch is on, and data can flow from the A port to the B port, or vice versa. When OE is high, the switch
is open, and the high-impedance state exists between the two ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C
SSOP – DL
TSSOP – DGG
Tube
Tape and reel
Tape and reel
SN74CBTK16245DL
SN74CBTK16245DLR
SN74CBTK16245DGGR
CBTK16245
CBTK16245
TVSOP – DGV Tape and reel SN74CBTK16245DGVR CP245
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
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 is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 2001, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1


Texas Instruments (TI) Electronic Components Datasheet

SN74CBTK16245 Datasheet

16-Bit FET Bus Switch

No Preview Available !

SN74CBTK16245
16-BIT FET BUS SWITCH
WITH ACTIVE-CLAMP UNDERSHOOT-PROTECTION CIRCUIT
SCDS105D APRIL 2000 REVISED NOVEMBER 2001
FUNCTION TABLE
(each 8-bit bus switch)
INPUT
OE
FUNCTION
L A port = B port
H Disconnect
logic diagram (positive logic)
VCC
UC
47
1A1
VCC
UC
37
1A8
48
1OE
VCC
UC
VCC
2
1B1
UC
12
1B8
Undershoot clamp
VCC
UC
36
2A1
VCC
UC
26
2A8
25
2OE
VCC
UC
13
2B1
VCC
UC
23
2B8
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74CBTK16245
Description 16-Bit FET Bus Switch
Maker Texas
Total Page 12 Pages
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