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AT28BV64B-20SU-T

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Microchip Tech EEPROM, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentmemoryat28bv64b-20su-tfactory-2.0.0extractor-text

Verified AT28BV64B-20SU-T

by Ray · last 12 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

12 Nov 2026RayPublished by the parts factory: tier mfr, 28 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AT28BV64B-20SU-T · SOIC-28-300mil · 28 pins
  • ✓copper: 28 copper pads, none touching another net
  • ✓datasheet: all 28 pin names found in the 17-page datasheet
  • ✓distributor: lcsc C2063878, digikey AT28BV64B-20SU-TTR-ND, mouser 556-AT28BV64B20SUT
  • ✓family: SOIC-28W_7.5x17.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-921sl4p3/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.14)
  • ✓pads: 28 pins = 28 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 28 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 46 kB, viewers/symbol.html 21 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ at28bv64b-20su-t.kicad_sym✓ at28bv64b-20su-t.kicad_mod✓ at28bv64b-20su-t.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers at28bv64b-20su-t: viewers rendered from the public page · Ray
at28bv64b-20su-t-etched.glb Publish 0.1.0 · Ray
at28bv64b-20su-t-etched.step at28bv64b-20su-t: factory component page (tier=mfr) · Ray
at28bv64b-20su-t-hero.glb at28bv64b-20su-t: hero GLB from the etched model (keeps the MPN mark) · Ray
at28bv64b-20su-t-hero.overlay.json at28bv64b-20su-t: hero GLB from the etched model (keeps the MPN mark) · Ray
at28bv64b-20su-t.glb Publish 0.1.0 · Ray
at28bv64b-20su-t.kicad_mod Publish 0.1.0 · Ray
at28bv64b-20su-t.kicad_sym Publish 0.1.0 · Ray
at28bv64b-20su-t.lbr Publish 0.1.0 · Ray
at28bv64b-20su-t.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json Set visibility: public · Ray
README.md Publish 0.1.0 · Ray
verification.json Verified: Published by the parts factory: tier mfr, 28 pins · Ray

AT28BV64B-20SU-T

Microchip Tech · EEPROM · SOIC-28-300mil

AT28BV64B-20SU-T from Microchip Tech, in a SOIC-28-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 NC unconnected No connect; the pin is not internally connected.
2 A12 input Address input A12; A6 to A12 define the page that all bytes of a page write must reside on.
3 A7 input Address input A7; A6 to A12 define the page that all bytes of a page write must reside on.
4 A6 input Address input A6; A6 to A12 define the page that all bytes of a page write must reside on.
5 A5 input Address input A5; A0 to A5 select which byte within the 64-byte page is written.
6 A4 input Address input A4; A0 to A5 select which byte within the 64-byte page is written.
7 A3 input Address input A3; A0 to A5 select which byte within the 64-byte page is written.
8 A2 input Address input A2; A0 to A5 select which byte within the 64-byte page is written.
9 A1 input Address input A1; A0 to A5 select which byte within the 64-byte page is written.
10 A0 input Address input A0; A0 to A5 select which byte within the 64-byte page is written.
11 I/O0 bidirectional Data input/output bit 0 for read data and write data.
12 I/O1 bidirectional Data input/output bit 1 for read data and write data.
13 I/O2 bidirectional Data input/output bit 2 for read data and write data.
14 GND power_in Device ground; all input and output voltage limits are specified with respect to ground.
15 I/O3 bidirectional Data input/output bit 3 for read data and write data.
16 I/O4 bidirectional Data input/output bit 4 for read data and write data.
17 I/O5 bidirectional Data input/output bit 5 for read data and write data.
18 I/O6 bidirectional Data input/output bit 6; it toggles during a write cycle and can be used as a toggle-bit end-of-write indicator.
19 I/O7 bidirectional Data input/output bit 7; DATA polling on this pin shows the complement of the written data until the write cycle ends.
20 CE input Chip enable; read requires CE low, and when CE is high the outputs are high impedance.
21 A10 input Address input A10; A6 to A12 define the page that all bytes of a page write must reside on.
22 OE input Output enable; with CE low and WE high, data is driven onto the I/O pins when OE is low.
23 A11 input Address input A11; A6 to A12 define the page that all bytes of a page write must reside on.
24 A9 input Address input A9; raising it to 12V ±0.5V accesses the 64-byte device identification area at addresses 0000H to 003FH.
25 A8 input Address input A8; A6 to A12 define the page that all bytes of a page write must reside on.
26 NC unconnected No connect; the pin is not internally connected.
27 WE input Write enable; a low pulse on WE with CE low and OE high initiates a write cycle.
28 VCC power_in Power supply; 2.7V to 3.6V for the AT28BV64B-20 operating range.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-28-300mil
Category Memory
Pins 28

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Temperature Under Bias -55 125 °C 5
Storage Temperature -65 150 °C 5
All Input Voltages (including NC Pins) with Respect to Ground -0.6 6.25 V 5
All Output Voltages with Respect to Ground -0.6 V Upper limit printed as VCC + 0.6 V 5
Voltage on OE and A9 with Respect to Ground -0.6 13.5 V 5
Operating Temperature (Case) -40 85 °C AT28BV64B-20 5
VCC Power Supply VCC 2.7 3.6 V AT28BV64B-20 5
Input Load Current ILI 10 µA VIN = 0V to VCC + 1V 6
Output Leakage Current ILO 10 µA VI/O = 0V to VCC 6
VCC Standby Current CMOS ISB 50 µA CE = VCC - 0.3V to VCC + 1V 6
VCC Active Current ICC 15 mA f = 5 MHz; IOUT = 0 mA 6
Input Low Voltage VIL 0.6 V 6
Input High Voltage VIH 2 V 6
Output Low Voltage VOL 0.45 V IOL = 1.6 mA 6
Output High Voltage VOH 2 V IOH = -100 µA 6
Input Pin Capacitance CIN 4 6 pF f = 1 MHz, T = 25°C; VIN = 0V 7
Output Pin Capacitance COUT 8 12 pF f = 1 MHz, T = 25°C; VOUT = 0V 7
Address to Output Delay tACC 200 ns 6
CE to Output Delay tCE 200 ns 6
OE to Output Delay tOE 0 80 ns 6
CE or OE to Output Float tDF 0 55 ns CL = 5pF (note 3) 6
Output Hold from OE, CE or Address, Whichever Occurred First tOH 0 ns 6
Address, OE Set-up Time tAS,tOES 0 ns 8
Address Hold Time tAH 100 ns 8
Chip Select Set-up Time tCS 0 ns 8
Chip Select Hold Time tCH 0 ns 8
Write Pulse Width (WE or CE) tWP 200 ns 8
Data Set-up Time tDS 100 ns 8
Data, OE Hold Time tDH,tOEH 0 ns 8
Write Pulse Width High tWPH 100 ns 8
Write Cycle Time tWC 10 ms 9
Address Set-up Time tAS 0 ns 9
Address Hold Time tAH 100 ns 9
Data Set-up Time tDS 100 ns 9
Data Hold Time tDH 0 ns 9
Write Pulse Width tWP 200 ns 9
Byte Load Cycle Time tBLC 100 µs 9
Write Pulse Width High tWPH 100 ns 9
Data Hold Time (Data Polling) tDH 0 ns 10
OE Hold Time (Data Polling) tOEH 0 ns 10
Write Recovery Time (Data Polling) tWR 0 ns 10
Data Hold Time (Toggle Bit) tDH 10 ns 11
OE Hold Time (Toggle Bit) tOEH 10 ns 11
OE High Pulse tOEHP 150 ns 11
Write Recovery Time (Toggle Bit) tWR 0 ns 11

CAD (KiCad official)

  • Symbol: AT28BV64B-20SU-T
  • Footprint: Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm
  • 3D model: SOIC-28-300mil (KiCad packages3D, STEP)
  • 3D model files: at28bv64b-20su-t-etched.step / at28bv64b-20su-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at28bv64b-20su-t.step / at28bv64b-20su-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (17 pp, sha256 d0489c27bca44b69, retrieved 2026-11-12, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF