The PHF–5 is a compact handsfree unit for handportable telephones and it provides a possibility to use HF operation. The phone cannot be used as a handset but the PHF–5 can be upgraded with a handset and an antenna coupler.
The hook off –signal is given to the phone when a handset is lifted from the
hook. The PHF–5 has an internal speaker and external microphone.
Technical Summary
Operation
The PHF–5 can be powered by LCH–6 or LCM–1 rapid chargers to provide
rapid charging for the phone also during a HF call. The LCH–8 tricle charger is
not recommended for powering the PHF–5 because during a HF call there will
be insufficient charging current available for the phone.
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Technical Documentation
The phone is connected to the unit by a system connector. The cable length
including the connector housing is 15 cm. The other connectors are d.c. jack
(input from the charger), microphone connector and a handset connector.
There is no RF connector or external speaker connector in the PHF–5.
The PHF–5 has an internal HF–speaker.
List of Modules
Name of Module:Material Code:
HF speaker module DH–60200658
Assembly parts MPHF–50260677
Basic Specifications
Function:Value:
Input voltage5.5...11 V d.c. typical range is
Current consumption60 mA typical average during HF call
6.5...7.5 V with LCH–6
Page 4
Power sourceLCH–6 or LCM–1 charger
Original 05/97
After Sales
Technical Documentation
Modes of Operation
Power Off
The module does not receive supply voltage from a charger to the d.c. connector. There are no voltages on the module.
Power on/Mute on
The d.c. voltage in the XEAR line is below 0.5 V. There is no audio input signal
present. HF speaker amplifier and headset amplifier are muted. The current
consumption is below 10 mA.
Power on/Mute off
The d.c. voltage in the XEAR line is above 1 V. If there is no handset connected
or the handset is on hook, the XEAR signal is routed to the HF speaker and the
HF microphone signal is routed to the XMIC line. If the handset is off hook, the
XEAR signal is routed to the handset speaker and the handset microphone signal is passed to the XMIC line.
Compact Handsfree Unit PHF–5
Modes of Audio Output Destination and Hook
The audio output is routed to handset connector if
– a handset is connected and it is lifted from the cradle
– a headset is connected
– a button headset is connected
Otherwise the audio output is routed to the internal speaker and HF micro-
phone signal is routed to XMIC.
The hook off signal is passed to the phone if audio output is routed to external
device. This means that whether a normal or a button headset is connected,
the hook is also always off.
Switching Delay between Handset Mode to/from HF Mode
The internal logic for audio routing and hook signal includes a delay, which is to
prevent erroneous behaviour of the whole system when switching between
modes.
The hook signal for phone is given without any delay.
The audio routing is delayed for about 0.5 seconds, when the audio routing is
to change from handset mode to HF mode. The delay is below 100 milliseconds, when the audio routing is to change from HF mode to handset mode.
Original 05/97
Page 5
Compact Handsfree Unit PHF–5
External Signals and Connections
D.C. Supply Connector X100
Pin:Signal name:Function:
1GNDGround
2VCCInput from charger
• min/max voltage:
• min/typ/max current: 740...780...820 mA d.c.
LCH–6 or LCM–1
• min current: 285 mA d.c. LCH–8,
not recommended
System Connector X250 (and System Cable Connector X200)
Pin(X200) Signal name:Function:
1 (1)GNDDigital ground
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Technical Documentation
5.5...10.8 V d.c.
2 (6)XMICMicrophone signal
3 (5)SGNDSignal ground
5 (2)V_INCharge output for phone, connected to VCC
6 (4)XEARSpeaker signal
12 (3)HOOKHook off to phone
HF Microphone Connector X300
Pin:Signal name:Function:
1GNDGround
• nominal voltage: 60 mV
• ld resistor/PHF–5: 22 kΩ to GND
• ld resistor/hook off: 22 kΩ to GND
• HF call min/typ/max curr: 630...730...810 mA
• mute on min/typ/max curr: 730...775...820 mA
• typ/max voltage: 60...694 mV
• mute on voltage: 0...0.5 V d.c.
• mute off voltage: 1...1.6...2 V d.c.
• min/typ/max voltage: 0...0.2...0.4 V
pulldown at hook off
Page 6
2HFMICMicrophone signal
• typical/max. voltage: 2...30 mV
• min/typ/max. bias voltage: 2...3.2...4.4 V d.c.
with load
Original 05/97
After Sales
Technical Documentation
Handset/Headset Connector X400
Pin:Signal name:Function:
1GNDGround
2HMICMicrophone signal
3HEARSpeaker signal
HF Speaker Connector X500
Pin:Signal name:Function:
1Speaker +Speaker positive signal
2Speaker –Speaker negative signal
Compact Handsfree Unit PHF–5
• typical/max. voltage: 0.7...15 mV
• min/typ/max. bias voltage: 2...3.2...4.4 V d.c.
• min/typ/max. voltage: 0...60...600 mV
with 100 Ω load
Circuit Description
The circuit blocks are described in these subsections. Refer to block diagram.
Connectors
There are 4 connectors to other units, and internal speaker connector. There
are d.c. input, phone bottom connector, microphone and handset/headset connector.
The incoming d.c. voltage is routed directly to system connector VCC pin.
Input Protection
The purpose of the input protection is to prevent ESD, RF and high or negative
input voltages to damage the module. Contacts that are subject to ESD are
protected with diode pairs. All inputs (as well as test pads) are protected from
RF. The RF shield metal plate (assembly part) is the physical interface subject
to RF shielding.
Original 05/97
Page 7
Compact Handsfree Unit PHF–5
CAP interface
This block converts signal levels and also provides single–ended to differential
and level conversions as well as hook pulldown and device identification.
Audio In
The circuit performs differential to single–ended conversion of incoming audio
signal. The function is: EAR = SGND–XEAR (Gain is 0 dB). Output d.c. bias in
EAR line is 2 V, input is a.c. coupled, and the stage tolerates about ±1.5 V combined common mode + differential mode input swing without clipping.
Audio Out
The circuit performs sum operation with minimum phase shift. The function is:
XMIC = SGND–MIC (Gain is 0 dB). Input d.c. bias in MIC line must be 2 V, output d.c. is not affected. The stage tolerates about ±1.5 V combined SGND and
MIC line swing without clipping.
After Sales
Technical Documentation
Device Identification
There is a 22 kΩ d.c. identification resistor connected from XMIC line to GND.
Hook
The circuit pulls HOOK line down when HOOKOFF line is high. The function is:
HOOK = –HOOKOFF. There is no pullup in the module.
5 V Regulation
The charger voltage is used as the input voltage for the module, and this block
regulates it to 5 V (named +5V in schematic). For low charger voltage input, the
maximum drop is 0.5 V so the block is full operative for input voltages downto
5.5 V.
2 V and 4 V Regulation
This block re–regulates the 5 V voltage to high ripple rejection 4 V line (named
VSTAB in schematic) and further to 2 V (named +2V in schematic). +2 V is
used as half voltage for audio stages and VSTAB is used for microphone biasing and low level microphone amplifier supply voltage.
Speaker Amplifier
This block is s.c. coupled full bridge speaker output stage. It has own 2.4 V half
voltage which is seen at both outputs SP+ and SP–. The output swing is
3 V
Page 8
and expected load is 15 ohms. It is possible to use a 8 Ω speaker, too,
RMS
Original 05/97
After Sales
Technical Documentation
but this doubles the power consumption and temperature rise of the IC and
therefore it might reduce lifetime. The amplifier is on when HFMUTE is off (below 2.4 V).
Headset Capsule Amplifier
This block is a current booster block that doubles the EAR input voltage but has
significant output impedance together with input protection block (100 Ω). The
load of the handset is also 100 Ω, so the actual gain is 0 dB for handset. A
headset with 32 Ω load impedance gets therefore less power, and the gain is
–6 dB. This matches the amplifier output for either device plugged in the handset connector. Maximum output voltages are 550 mV
225 mV
loads, respectively. The amplifier is on when HSMUTE is about 5 % below the
+2 V line level. The amplifier is off when HSMUTE is below 0.7 V. Levels between these are forbidden (except level transients) and lead to distorted output.
for headset, seen at the handset connector with 110 Ω and 32 Ω
RMS
Compact Handsfree Unit PHF–5
for handset and
RMS
HF Microphone Preamplifier
This block is used for high performance preamplifying of the HF microphone
signal. The mic is biased from VSTAB in this block. VSTAB is also used as a
supply voltage for the amplifier. The block is used also for level matching between the two mic inputs, as they have common amplifier/selector stage (Microphone amplifier). The gain is 10 dB, input impedance is 2 kΩ. The output
d.c. voltage is around 0.6 V, but when tied to GND by microphone amplifier
block, the amplifier is disabled.
Handset Microphone Preamplifier
This block is used for high performance preamplifying of the handset microphone signal. The mic is biased from VSTAB in this block. VSTAB is also used
as a supply voltage for the amplifier. The block is used also for a.c. level matching between the two mic inputs, as they have common amplifier/selector stage
(Microphone amplifier). The gain is 17 dB, input impedance is 2 kΩ. The output
d.c. voltage is around 0.6 V.
Microphone Amplifier
This block is used as a microphone selector and is also postamplifies the signal
providing the low output impedance MIC signal for the CAP interface block. The
two mic inputs are a.c. coupled and the output (MIC line) is biased to 2 V. The
EXTAUD line is used for input selection. When the EXTAUD is high, the HF microphone line is tied to GND, which disables the whole HF microphone preamplifier block increasing rejection in handset mode. When the EXTAUD is low,
the handset microphone amplifier block is operative but it cannot have any signal.
The gain in this stage is 20 dB for both of the input signals.
Original 05/97
Page 9
Compact Handsfree Unit PHF–5
Hookoff Sense
This block monitors the handset microphone current and provides HOOKOFF
and EXTAUD signals. The current of the 2.2 kΩ bias resistor of the handset microphone preamplifier block is monitored (by monitoring voltage drop) and if the
d.c. resistance of the handset microphone is less than about 50 kΩ, the HOOK-
OFF line is tied high (above 3 V), othervise low (below 0.1 V). The EXTAUD line
is following the HOOKOFF line, with RC time constant of 470 milliseconds.
The 50 kΩ d.c. impedance in the handset microphone corresponds to about
80 mA. If a handsfree microphone is plugged to handset plug, the block will
identify this as a handset or headset, and the audio output is shorted by the
mono plug of the HF microphone.
Muting Logic
This block monitors the XEARP and EXTAUD lines, and gives the HFMUTE
and HSMUTE signals, that switch the speaker and handset capsule amplifiers
to correct modes. This block is extremely level–sensitive and it does not have
simple ”0” or ”1” input or output signals.
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Technical Documentation
The XEARP d.c. level is monitored, and if the d.c. is below 0.7 V, both outputs
will be in mute state regardless of the EXTAUD state. If the XEARP d.c. is
above 0.7 V, the circuit creates internal reference level of 0.5 V, and decision is
made using the EXTAUD signal; if EXTAUD is above 0.5 V, the HSMUTE will be
off, and HFMUTE will be on. If XEARP d.c. level is above 0.6 V and EXTAUD is
below 0.5 V, then HFMUTE will be off and HSMUTE will be on.
The HFMUTE signal on–level is above 3 V and off–level is below 0.7 V (When
HFMUTE is on, the speaker amplifier is in shutdown).
The HSMUTE signal on–level is below 0.1 V and off–level is 5 % below +2 V
line level. There is a RC time constant of 0.1 seconds when changing between
these levels.
Page 10
Original 05/97
After Sales
Technical Documentation
Compact Handsfree Unit PHF–5
Power and Control Line Usage of Blocks
Block:Power line:Bias ControlNotes:
voltage:lines:
Input ProtectionDiode pairs––
to VCC & GND
CAP Interface+5 V+2 VHOOKOFF
5 V RegulationVCC––Gives +5V line out
2 V and 4 V+5 V––Gives VSTAB and
Regulation+2V lines out
Speaker Amplifier+5 VinternalHFMUTE
biasing
Handset Capsule+5 V+2 VHFMUTE
Amplifier
HF microphoneVSTABVSTAB–output pulldown will
preamplifierfor mic,lead to shutdown
internal biasing
Handset microphone VSTABVSTAB–output pulldown will
preamplifierfor mic,lead to shutdown
internal biasing
Microphone+5 V+2 VEXTAUD
Amplifier
Hookoff sense+5 VVSTABHMICPGives HOOKOFF
and EXTAUD lines
Muting logic+5 V+2 VXEARP,Gives HFMUTE
EXTAUD and HSMUTE lines
Original 05/97
Page 11
Compact Handsfree Unit PHF–5
Block Diagram
After Sales
Technical Documentation
Speaker
spring pads
sp–
sp+
X400
Handset
connector
hear
hearp
Handset
microphone
preamplifier,
ref = 510..519
Av = 17 dB
hmicp
X300
Microphone
connector
hfmichmicsp+sp–
Input protection,
ref = 100..199
hfmicphmicp
HF microphone
preamplifier,
ref = 500..509
Av = 10 dB
X200
6–pin cable
connector
hook
xmic
xmicp
CAP interface,
ref = 300..319
hookoff
mic
sgnd
sgndphookp
X100
DC connector
vcc
xear
xearp
vcc
Hook off sense,
ref = 270..279
Handset capsule
amplifier,
ref = 430..439
Av = 0 dB
Speaker amplifier,
ref = 460..469
Av = 21 dB,
Po = 50 mW nom,
3 Vrms max
extaud
hookoff
hsmute
hfmute
Microphone
amplifier
Av = 20 dB
extaud
Muting logic,
ref = 280..289
xearp
5V (+5V)
regulation,
ref = 200..209
+5V
ear
2V (+2V) and
4V (VSTAB)
regulation,
ref = 250..259
ear
Page 12
Original 05/97
Compact Handsfree Unit PHF–5
Layout Diagram of DH6 for layout version 12
After Sales
Technical Documentation
Page 14
Original 05/97
After Sales
Technical Documentation
Compact Handsfree Unit PHF–5
Part List of DH6 (EDMS Issue 7.0 Code: 0200658))
ITEMCODEDESCRIPTIONVALUETYPE
R1001413836 Chip resistor47 5 % 0.1 W 0805
R1011413836 Chip resistor47 5 % 0.1 W 0805
R1031413836 Chip resistor47 5 % 0.1 W 0805
R1041430167 Chip resistor47 5 % 0.063 W 0603
R1051430167 Chip resistor47 5 % 0.063 W 0603
R1061430167 Chip resistor47 5 % 0.063 W 0603
R1071430151 Chip resistor10 5 % 0.063 W 0603
R1081430151 Chip resistor10 5 % 0.063 W 0603
R1091430053 Chip resistor5.6 k5 % 0.063 W 0603
R1791413924 Chip resistor220 5 % 0.1 W 0805
R2501430087 Chip resistor100 k5 % 0.063 W 0603
R2511430087 Chip resistor100 k5 % 0.063 W 0603
R2521430087 Chip resistor100 k5 % 0.063 W 0603
R2701414536 Chip resistor200 k1 % 0.1 W 0805
R2711430071 Chip resistor22 k5 % 0.063 W 0603
R2721414536 Chip resistor200 k1 % 0.1 W 0805
R2731430087 Chip resistor100 k5 % 0.063 W 0603
R2741414536 Chip resistor200 k1 % 0.1 W 0805
R2751414536 Chip resistor200 k1 % 0.1 W 0805
R2761430065 Chip resistor10 k5 % 0.063 W 0603
R2801430071 Chip resistor22 k5 % 0.063 W 0603
R2811430065 Chip resistor10 k5 % 0.063 W 0603
R2821430043 Chip resistor2.2 k5 % 0.063 W 0603
R2831430087 Chip resistor100 k5 % 0.063 W 0603
R2841430087 Chip resistor100 k5 % 0.063 W 0603
R2851430087 Chip resistor100 k5 % 0.063 W 0603
R2861430087 Chip resistor100 k5 % 0.063 W 0603
R2871430095 Chip resistor220 k5 % 0.063 W 0603
R2881430065 Chip resistor10 k5 % 0.063 W 0603
R2891430065 Chip resistor10 k5 % 0.063 W 0603
R3001415696 Melf resistor2.21 k1 % 0.2 W 0204
R3011415696 Melf resistor2.21 k1 % 0.2 W 0204
R3021430087 Chip resistor100 k5 % 0.063 W 0603
R3041430053 Chip resistor5.6 k5 % 0.063 W 0603
R3051415696 Melf resistor2.21 k1 % 0.2 W 0204
R3061415696 Melf resistor2.21 k1 % 0.2 W 0204
R3081415939 Melf resistor22.1 k1 % 0.2 W 0204
R3091430095 Chip resistor220 k5 % 0.063 W 0603
R3101430043 Chip resistor2.2 k5 % 0.063 W 0603
R3111430043 Chip resistor2.2 k5 % 0.063 W 0603
R3121415696 Melf resistor2.21 k1 % 0.2 W 0204
R3131415696 Melf resistor2.21 k1 % 0.2 W 0204
R3141430065 Chip resistor10 k5 % 0.063 W 0603
Original 05/97
Page 15
Compact Handsfree Unit PHF–5
Technical Documentation
R4301430087 Chip resistor100 k5 % 0.063 W 0603
R4311430095 Chip resistor220 k5 % 0.063 W 0603
R4321430167 Chip resistor47 5 % 0.063 W 0603
R4331430167 Chip resistor47 5 % 0.063 W 0603
R4341430167 Chip resistor47 5 % 0.063 W 0603
R4351430065 Chip resistor10 k5 % 0.063 W 0603
R4361430087 Chip resistor100 k5 % 0.063 W 0603
R4601430071 Chip resistor22 k5 % 0.063 W 0603
R4611430091 Chip resistor150 k5 % 0.063 W 0603
R5001430065 Chip resistor10 k5 % 0.063 W 0603
R5011430043 Chip resistor2.2 k5 % 0.063 W 0603
R5021430087 Chip resistor100 k5 % 0.063 W 0603
R5031430071 Chip resistor22 k5 % 0.063 W 0603
R5101430065 Chip resistor10 k5 % 0.063 W 0603
R5111430043 Chip resistor2.2 k5 % 0.063 W 0603
R5121430087 Chip resistor100 k5 % 0.063 W 0603
R5131430065 Chip resistor10 k5 % 0.063 W 0603
R5301430071 Chip resistor22 k5 % 0.063 W 0603
R5311430095 Chip resistor220 k5 % 0.063 W 0603
R5321430043 Chip resistor2.2 k5 % 0.063 W 0603
R5331430071 Chip resistor22 k5 % 0.063 W 0603
R5341430095 Chip resistor220 k5 % 0.063 W 0603
C1002310791 Ceramic cap.33 n20 % 50 V 0805
C1012320091 Ceramic cap.2.2 n5 % 50 V 0603
C1022320091 Ceramic cap.2.2 n5 % 50 V 0603
C1032320063 Ceramic cap.150 p5 % 50 V 0603
C1042320091 Ceramic cap.2.2 n5 % 50 V 0603
C1052320091 Ceramic cap.2.2 n5 % 50 V 0603
C1062320063 Ceramic cap.150 p5 % 50 V 0603
C1072320091 Ceramic cap.2.2 n5 % 50 V 0603
C1082320063 Ceramic cap.150 p5 % 50 V 0603
C1092320091 Ceramic cap.2.2 n5 % 50 V 0603
C1102320063 Ceramic cap.150 p5 % 50 V 0603
C1112320063 Ceramic cap.150 p5 % 50 V 0603
C1122312208 Ceramic cap.15 n10 % 50 V 0805
C1132320063 Ceramic cap.150 p5 % 50 V 0603
C1142312208 Ceramic cap.15 n10 % 50 V 0805
C1152320063 Ceramic cap.150 p5 % 50 V 0603
C1162320063 Ceramic cap.150 p5 % 50 V 0603
C1172320091 Ceramic cap.2.2 n5 % 50 V 0603
C1182320091 Ceramic cap.2.2 n5 % 50 V 0603
C1192320063 Ceramic cap.150 p5 % 50 V 0603
C1202320091 Ceramic cap.2.2 n5 % 50 V 0603
C1212320063 Ceramic cap.150 p5 % 50 V 0603
C1222320091 Ceramic cap.2.2 n5 % 50 V 0603
C1232320091 Ceramic cap.2.2 n5 % 50 V 0603
C1242320063 Ceramic cap.150 p5 % 50 V 0603
C1302320077 Ceramic cap.560 p5 % 50 V 0603
After Sales
Page 16
Original 05/97
After Sales
Technical Documentation
C2002320091 Ceramic cap.2.2 n5 % 50 V 0603
C2022517848 Electrol. cap.220 u20 % 16v8.5x8.5x10.5
C2032611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C2502320091 Ceramic cap.2.2 n5 % 50 V 0603
C2512611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C2522611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C2532611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C2552320091 Ceramic cap.2.2 n5 % 50 V 0603
C2702611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C2812604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2822310791 Ceramic cap.33 n20 % 50 V 0805
C3002320063 Ceramic cap.150 p5 % 50 V 0603
C3012604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C3042320063 Ceramic cap.150 p5 % 50 V 0603
C3052604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C3062611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C3072611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C3082320063 Ceramic cap.150 p5 % 50 V 0603
C3092320063 Ceramic cap.150 p5 % 50 V 0603
C3102604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C4302320063 Ceramic cap.150 p5 % 50 V 0603
C4312611668Tantalum cap.4.7 u20 % 10 V 3.2x1.6x1.6
C4322604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C4332320063 Ceramic cap.150 p5 % 50 V 0603
C4602604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C4622320071 Ceramic cap.330 p5 % 50 V 0603
C4642312208 Ceramic cap.15 n10 % 50 V 0805
C4652320063 Ceramic cap.150 p5 % 50 V 0603
C5002320071 Ceramic cap.330 p5 % 50 V 0603
C5012604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C5022320063 Ceramic cap.150 p5 % 50 V 0603
C5042320071 Ceramic cap.330 p5 % 50 V 0603
C5102320071 Ceramic cap.330 p5 % 50 V 0603
C5112604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C5122320063 Ceramic cap.150 p5 % 50 V 0603
C5302310791 Ceramic cap.33 n20 % 50 V 0805
C5312310791 Ceramic cap.33 n20 % 50 V 0805
C5332320063 Ceramic cap.150 p5 % 50 V 0603
Z1033640011 Filt z>600r/100m 0r6max 0.2a 08050805
Z1053640011 Filt z>600r/100m 0r6max 0.2a 08050805
Z1063640011 Filt z>600r/100m 0r6max 0.2a 08050805
Z1073640011 Filt z>600r/100m 0r6max 0.2a 08050805
Z1083640011 Filt z>600r/100m 0r6max 0.2a 08050805
Z1093640011 Filt z>600r/100m 0r6max 0.2a 08050805
Z1103640011Filt z>600r/100m 0r6max 0.2a 08050805
Z1113640011 Filt z>600r/100m 0r6max 0.2a 08050805
V1004113828 Trans. supr.SMBJ28ADO214AA
V1014100285 Diode x 2BAV9970 V 200 mA SER.SOT23
Compact Handsfree Unit PHF–5
Original 05/97
Page 17
Compact Handsfree Unit PHF–5
Technical Documentation
V1024100285 Diode x 2BAV9970 V 200 mA SER.SOT23
V1034100285 Diode x 2BAV9970 V 200 mA SER.SOT23
V1044100285 Diode x 2BAV9970 V 200 mA SER.SOT23
V2504200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V2804200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V2814200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V3004200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V4304200909 TransistorBC858B/BCW30pnp 30 V 100 mA SOT23
V4604340303 IC, af amp 0.5w 2.7–5.5v so LM4861SO8S
V5004200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V5104200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V5304200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
N1004301182IC, 2 x op.amp.LM2902SO14S
N1014301182IC, 2 x op.amp.LM2902SO14S
N2004340065 Mic5201 regld 5v 0.2a 1% sot223SOT223
X1005409003 SM, jack 3.0mm f dc 9v 1a
X2005409015 Pin header 1x6 p1.5 0r02 1a 50v
X3005400017 Jack 2.5mm stereo smSMD
X4005400017 Jack 2.5mm stereo smSMD
9854073 PCB DH6 83X54X1.6 D 4/PA
9854073 PC boardDH683x54x1.6 d 4/pa