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CBT3857 Datasheet

10-bit bus switch with 10 kohm pull-down termination resistors

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INTEGRATED CIRCUITS
CBT3857
10-bit bus switch with 10 kpull-down
termination resistors
Product specification
Supersedes data of 1998 Dec 10
1999 Sep 14
Philips
Semiconductors


NXP Semiconductors Electronic Components Datasheet

CBT3857 Datasheet

10-bit bus switch with 10 kohm pull-down termination resistors

No Preview Available !

Philips Semiconductors
10-bit bus switch with 10 kpull-down
termination resistors
Product specification
CBT3857
FEATURES
Enable signal is SSTL_2 compatible
Optimized for use in Double Data Rate (DDR) SDRAM
applications
Flow-through architecture optimizes PCB layout
Designed to be used with 200 Mbps
Switch on resistance is designed to eliminate the need for series
resistor to DDR SDRAM
Internal 10 kpull-down resistors on B port
Internal 50 kpull-up resistor on output enable input
Full DDR solution provided when used with SSTL16857 and
PCK857
Latch-up protection exceeds 500 mA per JESD78
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
DESCRIPTION
This 10-bit bus switch is designed for 3 V to 3.6 V VCC operation
and SSTL_2 output enable (OE) input levels.
When OE is LOW, the 10-bit bus switch is on and port A is
connected to port B. When OE is HIGH, the switch is open, and a
high-impedance state exists between the two ports.
The low on-state resistance of the switch allows connections to be
made with minimal propagation delay.
The CBT3857 is characterized for operation from 0°C to +85°C.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
tPLH
tPHL
CIN
COUT
ICCZ
Propagation delay
An to Yn
Input capacitance
Output capacitance
Total supply current
CONDITIONS
Tamb = 25°C; GND = 0 V
CL = 30 pF; VCC = 3.3 V
VI = 0 V or VCC
Outputs disabled; VO = 0 V or VCC
VCC = 3.6 V
TYPICAL
720
2.8
6.4
1
UNIT
ps
pF
pF
mA
ORDERING INFORMATION
PACKAGES
24-Pin Plastic TSSOP Type I
PIN CONFIGURATION
VREF 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
A9 10
A10 11
GND 12
TEMPERATURE RANGE
0°C to +85°C
ORDER CODE
CBT3857 PW
ÎÎ24 Vcc
23 OE
22 B1
21 B2
20 B3
19 B4
18 B5
17 B6
16 B7
15 B8
14 B9
13 B10
PIN DESCRIPTION
PIN NUMBER
SYMBOL
1
2, 3, 4, 5, 6,
7, 8, 9, 10, 11
VREF
A1–A10
12 GND
22, 21, 20, 19, 18,
17, 16, 15, 14, 13
B1–B10
23 OE
24 VCC
FUNCTION TABLE
INPUT
OE
L
H
H = High voltage level
L = Low voltage level
DWG NUMBER
SOT355–1
NAME AND FUNCTION
Reference output voltage
Inputs
Ground (V)
Outputs
Output enable
Positive supply voltage
FUNCTION
A port = B port
Disconnect
1999 Sep 14
SA00516
2
853–2168 22329


Part Number CBT3857
Description 10-bit bus switch with 10 kohm pull-down termination resistors
Maker NXP
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CBT3857 Datasheet PDF






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