Datasheet Review and Symbol Validation

Thought for 3 mins 24 sec

Review result for W9825G6KH-6I

Step 2 was not needed: this part project already has a datasheet URL set in its properties, so no property update was required.

I was able to extract the datasheet content from mirrored copies of the same Winbond family datasheet: PDF and HTML. The existing Winbond URL in the part properties appears to serve a binary resource that was not directly readable by the file reader.

1) Available part information in this project

Table

Field	Value
MPN	W9825G6KH-6I
Manufacturer	Winbond
Part type	Integrated Circuits
Description	256 Mb SDRAM, 166 MHz, TSOP II 54
Package from datasheet	TSOP II, 54-pin, 400 mil, 0.80 mm pitch
Schematic implementation	54 individual terminal pins
PCB footprint presence	Yes, 54 pads present
Nets defined	None

2) Datasheet metadata summary Core device metadata

Table

Parameter	Datasheet value
Memory organization	4,194,304 words x 4 banks x 16 bits
Density	256 Mb
Interface	LVTTL
Supply voltage	3.3 V ± 0.3 V
Speed grade for -6I	166 MHz / CL3 or 133 MHz / CL2
Temperature grade for -6I	-40 °C to 85 °C
Package	TSOP II 54-pin, 400 mil, 0.80 mm pitch

Special features

Table

Feature	Datasheet value
CAS latency	2, 3
Burst lengths	1, 2, 4, 8, full page
Refresh	8K cycles / 64 ms at -40 °C to 85 °C
Self-refresh	Supported
Note	Self refresh not supported for TA > 85 °C
DQM	LDQM, UDQM byte masking
Precharge	Auto-precharge and controlled precharge
Power modes	Power-down, self-refresh

3) Absolute maximum ratings

Table

Parameter	Rating
Any pin relative to VSS	-1 V to VDD + 0.5 V, limited to 4.6 V max
VDD/VDDQ relative to VSS	-1 V to 4.6 V
Operating temperature for -6I	-40 °C to 85 °C
Storage temperature	-55 °C to 150 °C
Soldering temperature	260 °C for 10 s
Power dissipation	1 W
Short-circuit output current	50 mA

4) Recommended operating conditions and electrical characteristics Recommended operating conditions

Table

Parameter	Min	Typ	Max
VDD	3.0 V	3.3 V	3.6 V
VDDQ	3.0 V	3.3 V	3.6 V
VIH	2.0 V	-	VDD + 0.3 V
VIL	-0.3 V	-	0.8 V
Operating temperature for -6I	-40 °C	-	85 °C

DC characteristics

Table

Parameter	Datasheet value
VOH	2.4 V min at IOH = -2 mA
VOL	0.4 V max at IOL = 2 mA
Input leakage	-5 µA to 5 µA
Output leakage	-5 µA to 5 µA
IDD1 operating current for -6I	60 mA max
IDD2 standby current for -6I	25 mA max
IDD2P power-down standby for -6I	2 mA max
IDD3 no operating current for -6I	35 mA max
IDD4 burst operating current for -6I	80 mA max
IDD5 auto-refresh current for -6I	75 mA max
IDD6 self-refresh current for -6I	2 mA max

Capacitance

Table

Parameter	Max
CI	3.8 pF
CCLK	3.5 pF
CIO	6.5 pF

5) Pin descriptions from datasheet Power, ground, and control pins

Table

Pin/function	Datasheet description
VDD	Power for input buffers and logic circuit inside DRAM
VSS	Ground for input buffers and logic circuit inside DRAM
VDDQ	Power for I/O buffer, separated from VDD to improve DQ noise immunity
VSSQ	Ground for I/O buffer, separated from VSS to improve DQ noise immunity
CLK	System clock used to sample inputs on the rising edge
CKE	Controls clock activation/deactivation and entry to power-down, suspend, or self-refresh
CS	Chip select, enables/disables command decoder
RAS	Row address strobe command input
CAS	Column address strobe command input
WE	Write enable command input
LDQM / UDQM	Input/output mask pins for byte masking
NC	No connection

Address/data pins

Table

Pin/function	Datasheet description
A0-A12	Multiplexed row/column address inputs
A10/AP	Also selects auto-precharge behavior during precharge/read/write commands
BS0 / BS1	Bank select inputs
DQ0-DQ15	Multiplexed data input/output pins

6) Package dimensions

Table

Dimension	Min	Nom	Max
D	22.09 mm	22.22 mm	22.35 mm
E	11.56 mm	11.76 mm	11.96 mm
E1	10.03 mm	10.16 mm	10.29 mm
Pitch e	-	0.80 mm	-
Body height A	-	0.95 mm	1.05 mm
Lead length L	0.40 mm	0.50 mm	0.60 mm

7) Cross-check of symbol and footprint vs datasheet Critical findings

Table

Severity	Finding	Why it matters
Critical	The left-side symbol pin mapping is incorrect from pin 3 onward through pin 27.	This can cause a board wired to the wrong SDRAM pins, leading to total functional failure.
Critical	Several power and I/O supply pins are assigned to the wrong pin numbers.	This can cause incorrect power connection and possible device damage.
Critical	Several control/address pins are shifted to wrong numbers.	This will break memory initialization and bus operation even if the board is assembled correctly.
Medium	Footprint count appears correct at 54 pads, but geometric land pattern details were not exposed by the PCB inspector.	Pin count is consistent, but full mechanical verification of pad geometry/pitch in-project could not be completed from the available layout metadata.

Confirmed symbol mismatches

Table

Project symbol pin	Project pin number	Datasheet expected at that pin number	Result
VDDQ_1	3	DQ1	Mismatch
DQ1	4	DQ2	Mismatch
DQ2	5	VSSQ	Mismatch
VSSQ_1	6	DQ3	Mismatch
DQ4	8	VDDQ	Mismatch
VDDQ_2	9	DQ5	Mismatch
VDD_2	14	LDQM	Mismatch
LDQM	15	BS0	Mismatch
~WE	16	BS1	Mismatch
~CAS	17	A10/AP	Mismatch
~RAS	18	A0	Mismatch
~CS	19	A1	Mismatch
BS0	20	A2	Mismatch
BS1	21	A3	Mismatch
A10/AP	22	VDD	Mismatch
A0	23	CS	Mismatch
A1	24	RAS	Mismatch
A2	25	CAS	Mismatch
A3	26	WE	Mismatch
VDD_3	27	VDDQ	Mismatch

Pins that do appear consistent

Table

Project symbol pin	Pin number	Status
VDD_1	1	Matches datasheet
DQ0	2	Matches datasheet
VSS_1	28	Matches datasheet
A4 to VSS_3	29-54	Appears consistent with datasheet numbering

Bottom line

Table

Area	Verdict
Datasheet availability	Present
Part metadata completeness	Good after datasheet extraction
Symbol correctness	Fail - critical pin mapping errors
Footprint existence	Present
Footprint mechanical verification	Partial only
Risk if used as-is	High risk of nonfunctional or damaged hardware

The most important issue is the symbol pin map from pins 3-27. That should be corrected before this part is used in any design.

@review check symbol issues

Inspect footprint geometry

Fetch exact pin map

Reviews

Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
16.4k
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
RMCF0805JT47K0
General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
jharwinbarrozo
1.2M
875105359001
10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
jharwinbarrozo
1.1M
1070TR
Battery Holder (Open) Coin, 20.0mm 1 Cell SMD (SMT) Tab bate or batt #forLedBlink
jharwinbarrozo
700.5k