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PDF CBT3245A Data sheet ( Hoja de datos )
| Número de pieza | CBT3245A | |
| Descripción | Octal bus switch | |
| Fabricantes | NXP Semiconductors | |
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CBT3245A
Octal bus switch
Rev. 3 — 5 January 2012
Product data sheet
1. General description
The CBT3245A provides eight bits of high-speed TTL-compatible bus switching. The low
ON resistance of the switch allows connections to be made with minimal propagation
delay.
The CBT3245A is organized as one 8-bit bus switches with one output enable (OE) input.
When OE is LOW, the switch is on and port A is connected to the B port. When OE is
HIGH, each switch is disabled. The CBT3245A is characterized for operation from 40 C
to +85 C.
2. Features and benefits
5 switch connection between two ports
TTL-compatible control input levels
Multiple package options
Latch-up protection exceeds 500 mA per JESD78
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115B exceeds 150 V
CDM JESD22-C101C exceeds 1000 V
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature
range
CBT3245AD
40 C to +85 C
CBT3245ADB
40 C to +85 C
CBT3245ADS
40 C to +85 C
CBT3245APW 40 C to +85 C
CBT3245ABQ
40 C to +85 C
Name
SO20
SSOP20
SSOP20[1]
TSSOP20
DHVQFN20
Description
Version
plastic small outline package; 20 leads;
body width 7.5 mm
plastic shrink small outline package; 20 leads;
body width 5.3 mm
plastic shrink small outline package; 20 leads; body
width 3.9 mm; lead pitch 0.635 mm
plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
plastic dual-in-line compatible thermal enhanced very
thin quad flat package; no leads; 20 terminals; body
2.5 4.5 0.85 mm
SOT163-1
SOT339-1
SOT724-1
SOT360-1
SOT764-1
[1] Also known as QSOP20 package
1 page  
NXP Semiconductors
CBT3245A
Octal bus switch
Table 6. Static characteristics …continued
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
RON ON resistance
VCC = 4.5 V; VI = 0 V; II = 64 mA
VCC = 4.5 V; VI = 0 V; II = 30 mA
VCC = 4.5 V; VI = 2.4 V; II = 15 mA
Tamb = 40 C to +85 C
Min Typ[1] Max
Unit
[3] - 5 7
[3] - 5 7
[3] -
10 15
[1] All typical values are at VCC = 5 V, Tamb = 25 C.
[2] This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
[3] Measured by the voltage drop between the An and the Bn terminals at the indicated current through the switch. ON resistance is
determined by the lowest voltage of the two (An or Bn) terminals.
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 7.
Symbol
Parameter
Conditions
tpd propagation delay
ten enable time
tdis disable time
An, Bn to Bn, An; see Figure 5
VCC = 5.0 V 0.5 V
OE to An or Bn; see Figure 6
VCC = 5.0 V 0.5 V
OE to An or Bn; see Figure 6
VCC = 5.0 V 0.5 V
Tamb = 40 C to +85 C Unit
Min Max
[1][2]
-
[2]
0.25 ns
1.0
[2]
5.9 ns
1.0 6.0 ns
[1] The propagation delay is the calculated RC time constant of the typical ON resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
[2] tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
CBT3245A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 5 January 2012
© NXP B.V. 2012. All rights reserved.
5 of 16
5 Page 
NXP Semiconductors
CBT3245A
Octal bus switch
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
y
Z
20
D
c
11
EA
X
HE v M A
pin 1 index
1
e
10
wM
bp
A2
A1
Q
(A3)
A
Lp
L
detail X
θ
0 2.5 5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
D (1) E (2)
e
6.6
6.4
4.5
4.3
0.65
HE
6.6
6.2
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
IEC
REFERENCES
JEDEC
JEITA
SOT360-1
MO-153
L Lp Q v w y Z (1) θ
1
0.75 0.4
0.50 0.3
0.2 0.13 0.1
0.5
0.2
8o
0o
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Fig 11. Package outline SOT360-1 (TSSOP20)
CBT3245A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 5 January 2012
© NXP B.V. 2012. All rights reserved.
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