AT27C010-70PU - 1Mb (128Kx8) OTP EPROM, 70ns, 32-PDIP | Microchip
Référence : AT27C010-70PU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.67 | $6,67 |
| 10 | $6 | $60,00 |
| 100 | $5.4 | $540,00 |
| 500 | $4.85 | $2 425,00 |
| 1 000 | $4.35 | $4 350,00 |
AT27C010-70PU Présentation
An EPROM (erasable programmable read-only memory) is a non-volatile memory technology that stores bits via trapped charge on a floating-gate transistor. The OTP variant cannot be erased by UV light after wafer-level programming and is intended for low-to-mid volume production where the cost of windowed ceramic EPROMs is not justified. In the system hierarchy, EPROM sits between mask ROM and EEPROM/Flash: cheaper than Flash per bit, faster than Flash for byte-level random reads, and one-time-programmable like mask ROM but without the mask tooling charge.
Key features include a 70 ns access time that eliminates the need for WAIT states on most 8-bit and 16-bit microcontrollers of its era, low-power CMOS operation with 100 uA standby and 25 mA active supply current, TTL-compatible inputs and outputs, and JEDEC-approved byte-wide pinout. Any byte can be read in less than 45 ns per the family specification, and the device supports rapid programming algorithms verified by the manufacturer.
Typical applications include firmware storage in 8051, Z80, and 68HC11 embedded systems, BIOS and boot ROM sockets in industrial PCs and gaming consoles, retro-computing restorations of CP/M and arcade boards, and lookup-table or character-generator ROMs. The PDIP-32 footprint is compatible with industry-standard 27C010 sockets including UV-erasable variants, allowing field programming via a separate programmer and socketed replacement.
When designing with the AT27C010-70PU, ensure VPP (pin 1) is held at 0 V in read mode and routed through a dedicated programming supply only during device programming. Add a 0.1 uF decoupling capacitor close to VCC (pin 32) and a bulk 1 uF tantalum cap on the supply rail, and use a 74HC245 or similar bus driver when more than one memory device shares a common 8-bit bus to prevent contention during bus arbitration.
This page synthesizes distributor pricing from DigiKey, Mouser, Octopart and LCSC, real drop-in alternatives from Microchip and AMD/Amtel cross-reference data, and practical design notes not consolidated in the manufacturer datasheet, giving engineers an information-density advantage when sourcing legacy parallel EPROMs.
Alternatives de remplacement direct pour AT27C010-70PU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
AT27C010-70PI
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
AM27C010-70PI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SST27SF010-70-3C-PGE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
W27C010-70N
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AT27C010L-70PU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
AT27C010-70PU Valeurs maximales et caractéristiques électriques
| Type de mémoire | EPROM - OTP (One-Time Programmable) |
| Taille de mémoire | 1 Mbit (128K x 8) |
| Organisation de la mémoire | 128K x 8 bits |
| Access Time | 70 ns |
| Supply Voltage (Read) | 4.5 V to 5.5 V (5 V typical) |
| Programming Voltage (VPP) | 12.75 V typical |
| Active Supply Current | 25 mA typical |
| Standby Supply Current | 100 uA typical |
| Interface | Parallel |
| Output Enable (OE#) | Yes, active-low |
| Chip Enable (CE#) | Yes, active-low, low-power standby |
| Boîtier | 32-PDIP (0.600 in / 15.24 mm) |
| Température de fonctionnement | 0C to +70C (commercial) |
| Type de montage | Through-Hole (THT) |
| Nombre de broches | 32 |
Configuration des broches de AT27C010-70PU
| Broche 1 | VPP — Programming voltage supply (12.75 V during program; GND in read mode) |
| Broche 2 | A16 — Address input bit 16 (MSB) |
| Broche 3 | A15 — Address input bit 15 |
| Broche 4 | A12 — Address input bit 12 |
| Broche 5 | A7 — Address input bit 7 |
| Broche 6 | A6 — Address input bit 6 |
| Broche 7 | A5 — Address input bit 5 |
| Broche 8 | A4 — Address input bit 4 |
| Broche 9 | A3 — Address input bit 3 |
| Broche 10 | A2 — Address input bit 2 |
| Broche 11 | A1 — Address input bit 1 |
| Broche 12 | A0 — Address input bit 0 (LSB) |
| Broche 13 | O0 — Data output bit 0 (LSB) |
| Broche 14 | O1 — Data output bit 1 |
| Broche 15 | O2 — Data output bit 2 |
| Broche 16 | GND — Ground reference |
| Broche 17 | O3 — Data output bit 3 |
| Broche 18 | O4 — Data output bit 4 |
| Broche 19 | O5 — Data output bit 5 |
| Broche 20 | O6 — Data output bit 6 |
| Broche 21 | O7 — Data output bit 7 (MSB) |
| Broche 22 | OE# — Output Enable (active-low; high-Z when deasserted) |
| Broche 23 | A10 — Address input bit 10 |
| Broche 24 | CE# — Chip Enable (active-low; standby when deasserted) |
| Broche 25 | A11 — Address input bit 11 |
| Broche 26 | A9 — Address input bit 9 |
| Broche 27 | A8 — Address input bit 8 |
| Broche 28 | A13 — Address input bit 13 |
| Broche 29 | A14 — Address input bit 14 |
| Broche 30 | NC — Not connected (per JEDEC standard 32-PDIP EPROM pinout) |
| Broche 31 | PGM# — Program enable (active-low; held high in read mode) |
| Broche 32 | VCC — +5 V supply voltage |
Applications typiques
AT27C010-70PU convient pour 6 applications: 8051/Z80/68HC11 Firmware Storage, Retro-Computing BIOS / Boot ROM, Character Generator / Lookup Table ROM, Industrial Control Logic Storage, Game Cartridge ROM, Vintage Test Equipment Firmware.
8051/Z80/68HC11 Firmware Storage
The AT27C010-70PU is a classic firmware ROM for 8-bit microcontrollers of its era, including the 8051, Z80, and 68HC11 families. Its 128K x 8 organization accommodates up to 128 KB of code without bank-switching on systems with 17 address lines. The 70 ns access time eliminates WAIT-state insertion on these CPUs (typical clock 12-25 MHz), while the 32-PDIP socket-mount footprint enables field replacement via a standard EPROM programmer. Power consumption stays at 25 mA active and 100 uA standby, well within the thermal envelope of legacy industrial control boards.
Recommandé
Retro-Computing BIOS / Boot ROM
The AT27C010-70PU served as the boot ROM in countless 1980s-1990s PCs, workstations, gaming consoles, and arcade boards, where its 128 KB capacity held BIOS, POST routines, or game code. The JEDEC-standard 32-PDIP pinout is socket-compatible with UV-erasable 27C010 ceramic-windowed parts, allowing restoration of vintage systems with a programmed OTP device. The 70 ns access time supports ISA-bus and similar 8/16-bit system memory interfaces without wait states, and the part tolerates the 5 V supply rails typical of retro hardware.
Recommandé
Character Generator / Lookup Table ROM
In terminal emulators, dot-matrix printers, and industrial HMI displays, the AT27C010-70PU stores 8-bit-wide font glyphs, character attribute tables, or mathematical lookup data. Its 128K x 8 organization holds complete 8x16 dot-matrix font sets for 256 characters at 16 bytes each (4 KB) plus user-defined glyph extensions. The 70 ns access time delivers fast random-access glyph reads for raster-scan display refresh, while the parallel interface simplifies connection to discrete-logic video controllers. The 32-PDIP package suits through-hole display controller boards.
Recommandé
Industrial Control Logic Storage
The AT27C010-70PU is widely deployed in PLCs, motor controllers, and SCADA front-end terminals where stable, OTP-only firmware prevents accidental field rewriting. Its 128 KB capacity suits ladder-logic interpreters and serial-protocol stack firmware for Modbus, Profibus, or DeviceNet stacks. The commercial 0C to +70C operating range covers most factory-floor enclosures; for outdoor or unheated cabinets, the AT27C010-70PI industrial variant extends the range to -40C to +85C. The 32-PDIP socket-mount footprint enables service-replacement without desoldering.
Recommandé
Game Cartridge ROM
The AT27C010-70PU is a staple of 8-bit and 16-bit home-console and arcade game cartridge manufacturing, where its 128 KB capacity holds complete game binaries for systems like the Sega Master System, NES-era titles with bank-switching, and arcade boards. OTP programming locks game data permanently, preventing ROM-dumping piracy at the time of release. The 70 ns access time keeps up with mid-1990s console CPU speeds (typically 3-7 MHz), and the 32-PDIP through-hole package suits standard cartridge PCB footprints.
Recommandé
Vintage Test Equipment Firmware
The AT27C010-70PU is found in 1990s-era oscilloscopes, logic analyzers, signal generators, and spectrum analyzers as firmware storage for DSP calibration data, user-interface menus, and measurement routines. Its 128 KB capacity holds complete instrument firmware images for many Tektronix, HP/Agilent, and LeCroy platforms. The 70 ns access time keeps pace with the embedded 68000 or 8086-class processors in these instruments, and the 32-PDIP socketed design enables service centers to swap firmware revisions without desoldering.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AT27C010-70PU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AT27C010-70PI | AM27C010-70PI | SST27SF010-70-3C-PGE | W27C010-70N | AT27C010L-70PU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology (Rochester) | Microchip Technology (SST legacy) | Microchip Technology (Winbond legacy) | Microchip Technology |
| Package | 32-PDIP (0.600 in) | 32-PDIP (0.600 in) - same | 32-PDIP (0.600 in) - same | 32-PDIP (0.600 in) - same | 32-PDIP (0.600 in) - same | 32-PDIP (0.600 in) - same |
| Memory Type | OTP EPROM | OTP EPROM | UV-EPROM (FFF equivalent) | Flash (electrically erasable) | EEPROM (electrically byte-erasable) | OTP EPROM (low-power) |
| Memory Size | 1 Mbit (128K x 8) | 1 Mbit (128K x 8) | 1 Mbit (128K x 8) | 1 Mbit (128K x 8) | 1 Mbit (128K x 8) | 1 Mbit (128K x 8) |
| Access Time | 70 ns | 70 ns | 70 ns | 70 ns | 70 ns | 70 ns |
| Active Supply Current | 25 mA typical | 25 mA typical | 25 mA typical | 30 mA typical | 30 mA typical | 12 mA typical (-52%) |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) |
| Programming/Erase Method | OTP (one-time) | OTP (one-time) | UV-erasable (windowed) | Sector-erasable Flash | Byte-erasable EEPROM | OTP (one-time) |
Principaux différenciateurs
- Industry-standard JEDEC pinout ensures socket compatibility (vs AM27C010-70PI)
- Drop-in compatibility with Flash-based SST27SF010 for read-only applications (vs SST27SF010-70-3C-PGE)
- Lower active supply current than Flash/EEPROM alternatives (vs W27C010-70N)
Notes de conception
The AT27C010-70PU draws 25 mA active and 100 uA standby from a single +5 V supply on pin 32. Place a 0.1 uF ceramic decoupling capacitor within 5 mm of pin 32 and a bulk 1-10 uF tantalum or low-ESR electrolytic capacitor on the same supply rail. The 5 V rail must hold within 4.5-5.5 V; excursions below 4.5 V risk read errors and above 5.5 V accelerate oxide degradation. Estimated standby power at 5 V is 0.5 mW (5 V x 100 uA) and active power is 125 mW (5 V x 25 mA), which is negligible thermal load for any PDIP-32 footprint.
Mount the AT27C010-70PU in a standard 32-pin DIP socket (e.g., 3M 32-pin machined-pin or Aries 32-DIP low-profile) to enable field replacement and programming. The socket should be oriented with the notch matching the device pin 1 marker, and pin 1 (VPP) must be clearly labeled on the silk screen to prevent accidental 5 V application during programming. Route address and data bus traces with matched impedance (typically 50-70 ohm characteristic) and keep trace lengths under 150 mm to preserve signal integrity at 70 ns access times. Decoupling capacitors should be placed as close as possible to VCC (pin 32) and GND (pin 16).
Critical pitfalls when using the AT27C010-70PU: (1) Never apply 5 V to pin 1 (VPP) in read mode - this can degrade the device over time; pin 1 must be tied to GND in normal operation. (2) Ensure OE# (pin 22) and CE# (pin 24) are both active-low - a floating OE# line will cause bus contention. (3) When using the device in a parallel bus with multiple memories, insert a bus driver (74HC245) to prevent contention during read cycles. (4) The 70 ns access time requires the address to be stable before CE# falling edge; violating setup time causes data corruption. (5) OTP parts cannot be reprogrammed if programming fails - verify with a programmer read-back before removing the device from the programmer socket.
Address lines A0-A16 must be stable at least 70 ns before OE# falling edge to avoid address-line-induced data glitches. When the AT27C010-70PU is interfaced to a fast microcontroller (clock period < 70 ns), insert wait states or use a bus cycle extension peripheral to ensure tACC is satisfied. Output enable (OE#) typically asserts 30 ns before CE# falls in properly-sequenced reads, with tCE = 70 ns total. Estimated worst-case bus throughput at full speed is approximately 14 MB/s (1 / 70 ns x 8 bits), which is sufficient for 8051, Z80, and 68HC11 systems but inadequate for 32-bit CPUs above 50 MHz without wait states.
Informations de conformité
RoHS compliance confirmed via Microchip product page lead-free 'PU' suffix designation. REACH, halogen-free, and AEC-Q100 status not explicitly stated in available data; consult Microchip's environmental compliance documents for full disclosure.
