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LP3929 Datasheet, PDF (4/12 Pages) National Semiconductor (TI) – High Speed Bi-Directional Level Shifter and Ultra Low-Dropout CMOS Voltage Regulator and Line
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Pin Descriptions
Pin Name
D0_A
micro SMD
Bump Identifier
D1
D1_A
E1
D2_A
A1
D3_A
B1
CMD_A
D2
CLK_A
C1
fCLK_A
E2
DIR_0
A3
Port / Direction
Host /
Bidirectional
Host /
Bidirectional
Host /
Bidirectional
Host /
Bidirectional
Host /
Bidirectional
Host / Input
Host / Output
Host / Input
DIR_1-3
E3
Host / Input
CMD_DIR
A2
Host / Input
EN
C2
Host / Input
D0_B
D1_B
D2_B
D3_B
CMD_B
CLK_B
VBAT
VDDA
VDDB
VSS
VSS
WP
CD
D5
Card /
Bidirectional
E5
Card /
Bidirectional
A5
Card /
Bidirectional
B5
Card /
Bidirectional
D4
Card /
Bidirectional
C5
Card / Output
A4
Host / Input
B3
Host / Input
B4
Card / Output
C3
C4
E4
Host / Card Input
D3
Host / Card Input
Type
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
High Z
Push-Pull
High Z
High Z
High Z
High Z
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Power
Power
Power
Pull-up
Pull-up
Function
1.8 V I/O Channel (Note 14)
1.8 V I/O Channel (Note 14)
1.8 V I/O Channel (Note 14)
1.8 V I/O Channel (Note 14)
1.8 V I/O Channel (Note 14)
1.8 V Input CLK Channel (Note 14)
1.8 V Output CLK Channel
1.8 V Input Direction Control D0 Channel:
VDDA = A → B Direction (Write),
VSS = B → A Direction (Read)
1.8 V Input Direction Control D1-D3 Channel:
VDDA = A → B Direction (Write),
VSS = B → A Direction (Read)
1.8 V Input Direction Control CMD Channel:
VDDA = A → B Direction (Write),
VSS = B → A Direction (Read)
Device Enable with high impedance pull-down resistor
(200 kΩ):
VDDA = Device Active (on),
VSS = Device Disabled (off)
2.85 V I/O Channel with high impedance pull-up to VDDB
(70 kΩ)
2.85 V I/O Channel with high impedance pull-up to VDDB
(70 kΩ)
2.85 V I/O Channel with high impedance pull-up to VDDB
(70 kΩ)
2.85 V I/O Channel with high impedance pull-down to VSS
(470 kΩ)
2.85 V I/O Channel with high impedance pull-up to VDDB
(15 kΩ)
2.85 V Output CLK Channel
3.05 V to 5.5 V
1.71 V to 1.92 V, 1.8 V (typ)
2.85 V (LDO output)
Ground
Ground
Pull-up to VDDA (100 kΩ)
Pull-up to VDDA (100 kΩ)
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