NVT4857UK
SD 3.0-SDR104 compliant integrated auto-direction control
memory card voltage level translator with EMI filter and ESD
protection
Rev. 1.1 — 13 December 2016
Product data sheet
1. General description
The device is an SD 3.0-compliant bidirectional dual voltage level translator with
auto-direction control. It is designed to interface between a memory card operating at
1.8 V or 3.0 V signal levels and a host with a nominal supply voltage of 1.2 V to 1.8 V.
The device supports SD 3.0 SDR104, SDR50, DDR50, SDR25, SDR12 and SD 2.0
High-Speed (50 MHz) and Default-Speed (25 MHz) modes. The device has an integrated
voltage selectable low dropout regulator to supply the card-side I/Os, an auto-enable/
disable function connected to the V
SD
supply pin, built-in EMI filters and robust ESD
protections (IEC 61000-4-2, level 4).
2. Features and benefits
Supports up to 208 MHz clock rate
SD 3.0 specification-compliant voltage translation to support SDR104, SDR50,
DDR50, SDR25, SDR12, High-Speed and Default-Speed modes
1.2 V to 1.8 V host side interface voltage support
Feedback channel for clock synchronization
100 mA Low dropout voltage regulator to supply the card-side I/Os
Low power consumption by push-pull output stage with break-before-make
architecture
Automatic enable and disable through V
SD
Integrated pull-up and pull-down resistors: no external resistors required
Integrated EMI filters suppress higher harmonics of digital I/Os
Integrated 8 kV ESD protection according to IEC 61000-4-2, level 4 on card side
Level shifting buffers keep ESD stress away from the host (zero-clamping concept)
20-ball WLCSP; pitch 0.4 mm
3. Applications
Smart phones
Mobile handsets
Digital cameras
Tablet PCs
Laptop computers
SD, MMC or microSD card readers
NXP Semiconductors
NVT4857UK
SD 3.0 - SDR104 auto-direction control memory card level translator
4. Ordering information
Table 1.
Ordering information
Topside mark
N4857
Package
Name
NVT4857UK
WLCSP20
Description
wafer level chip-size package; 20 bumps (5
4),
size 1.7 x 2.1 x 0.49 mm, 0.4 mm pitch
Version
NVT4857
Type number
4.1 Ordering options
Table 2.
Ordering options
Orderable
part number
NVT4857UKZ
NVT4857UKAZ
Package
Packing method
Minimum
order
quantity
500
10000
Temperature
Type number
NVT4857UK
NVT4857UK
WLCSP20
WLCSP20
REEL 7" Q1/T1 *SPECIAL
MARK CHIPS DP
REEL 13" Q1/T1 *SPECIAL
MARK CHIPS DP
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
NVT4857UK
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1.1 — 13 December 2016
2 of 24
NXP Semiconductors
NVT4857UK
SD 3.0 - SDR104 auto-direction control memory card level translator
7. Pinning information
7.1 Pinning
bump A1
index area
A1
B1
C1
D1
E1
A2
B2
C2
D2
E2
A3
B3
C3
D3
E3
A4
B4
C4
D4
E4
transparent top view,
solder balls facing down
aaa-018949
Fig 3.
Pin configuration WLCSP20
DAT2A
VCCA
VSD
DAT2B
DAT3A
CD
VCCB
DAT3B
CMDA
GND
GND
CMDB
DAT0A
CLKA
CLKB
DAT0B
DAT1A
CLK_FB
SEL
DAT1B
aaa-013317
Fig 4.
Table 3.
Pin
A1
B1
C1
D1
E1
NVT4857UK
NVT4857UK pinout transparent top view
Pin allocation table
Pin
A2
B2
C2
D2
E2
Symbol
V
CCA
CD
GND
CLKA
CLK_FB
Pin
A3
B3
C3
D3
E3
Symbol
V
SD
V
CCB
GND
CLKB
SEL
Pin
A4
B4
C4
D4
E4
Symbol
DAT2B
DAT3B
CMDB
DAT0B
DAT1B
5 of 24
Symbol
DAT2A
DAT3A
CMDA
DAT0A
DAT1A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1.1 — 13 December 2016
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