diff --git a/scripts/src/machine.lua b/scripts/src/machine.lua
index 339957e31ee..1b74ef6dea6 100644
--- a/scripts/src/machine.lua
+++ b/scripts/src/machine.lua
@@ -435,18 +435,6 @@ if (MACHINES["7200FIFO"]~=null) then
 	}
 end
 
----------------------------------------------------
---
---@src/devices/machine/7400.h,MACHINES["TTL7400"] = true
----------------------------------------------------
-
-if (MACHINES["TTL7400"]~=null) then
-	files {
-		MAME_DIR .. "src/devices/machine/7400.cpp",
-		MAME_DIR .. "src/devices/machine/7400.h",
-	}
-end
-
 ---------------------------------------------------
 --
 --@src/devices/machine/7404.h,MACHINES["TTL7404"] = true
diff --git a/src/devices/machine/7400.cpp b/src/devices/machine/7400.cpp
deleted file mode 100644
index 74631c81007..00000000000
--- a/src/devices/machine/7400.cpp
+++ /dev/null
@@ -1,92 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Ryan Holtz
-/*****************************************************************************
-
-    7400 Quad 2-Input NAND Gate
-
-*****************************************************************************/
-
-#include "emu.h"
-#include "7400.h"
-
-DEFINE_DEVICE_TYPE(TTL7400, ttl7400_device, "7400", "7400 Quad 2-Input NAND Gate")
-
-ttl7400_device::ttl7400_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
-	: device_t(mconfig, TTL7400, tag, owner, clock)
-	, m_y_func(*this)
-	, m_a(0)
-	, m_b(0)
-	, m_y(0)
-{
-}
-
-void ttl7400_device::device_start()
-{
-	save_item(NAME(m_a));
-	save_item(NAME(m_b));
-	save_item(NAME(m_y));
-}
-
-void ttl7400_device::device_reset()
-{
-	m_a = 0;
-	m_b = 0;
-	m_y = 0;
-}
-
-void ttl7400_device::update()
-{
-	uint8_t last_y = m_y;
-
-	m_y = (m_a & m_b) & 0xf;
-
-	if (m_y != last_y)
-	{
-		for (std::size_t bit = 0; bit < 4; bit++)
-		{
-			if (BIT(m_y, bit) == BIT(last_y, bit))
-				continue;
-
-			m_y_func[bit](BIT(m_y, bit));
-		}
-	}
-}
-
-void ttl7400_device::a_w(uint8_t line, uint8_t state)
-{
-	uint8_t old_a = m_a;
-	m_a &= ~(1 << line);
-	m_a |= (state << line);
-	if (old_a != m_a)
-		update();
-}
-
-void ttl7400_device::b_w(uint8_t line, uint8_t state)
-{
-	uint8_t old_b = m_b;
-	m_b &= ~(1 << line);
-	m_b |= (state << line);
-	if (old_b != m_b)
-		update();
-}
-
-uint8_t ttl7400_device::y_r(uint8_t line)
-{
-	return (m_y >> line) & 1;
-}
-
-
-void ttl7400_device::a1_w(int state) { a_w(0, state); }
-void ttl7400_device::a2_w(int state) { a_w(1, state); }
-void ttl7400_device::a3_w(int state) { a_w(2, state); }
-void ttl7400_device::a4_w(int state) { a_w(3, state); }
-
-void ttl7400_device::b1_w(int state) { b_w(0, state); }
-void ttl7400_device::b2_w(int state) { b_w(1, state); }
-void ttl7400_device::b3_w(int state) { b_w(2, state); }
-void ttl7400_device::b4_w(int state) { b_w(3, state); }
-
-int ttl7400_device::y1_r() { return y_r(0); }
-int ttl7400_device::y2_r() { return y_r(1); }
-int ttl7400_device::y3_r() { return y_r(2); }
-int ttl7400_device::y4_r() { return y_r(3); }
diff --git a/src/devices/machine/7400.h b/src/devices/machine/7400.h
deleted file mode 100644
index ec449aabc7c..00000000000
--- a/src/devices/machine/7400.h
+++ /dev/null
@@ -1,85 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Ryan Holtz
-/*****************************************************************************
-
-    7400 Quad 2-Input NAND Gate
-
-***********************************************************************
-
-    Connection Diagram:
-              ___ ___
-       1A  1 |*  u   | 14  Vcc
-       1B  2 |       | 13  4B
-       1Y  3 |       | 12  4A
-       2A  4 |       | 11  4Y
-       2B  5 |       | 10  3B
-       2Y  6 |       | 9   3A
-      GND  7 |_______| 8   3Y
-
-    Truth Table:
-        ___________
-       | A | B | Y |
-       |---|---|---|
-       | 0 | 0 | 0 |
-       | 0 | 1 | 0 |
-       | 1 | 0 | 0 |
-       | 1 | 1 | 1 |
-       |___|___|___|
-
-**********************************************************************/
-
-#ifndef MAME_MACHINE_7400_H
-#define MAME_MACHINE_7400_H
-
-#pragma once
-
-class ttl7400_device : public device_t
-{
-public:
-	// construction/destruction
-	ttl7400_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
-
-	template <std::size_t Bit> auto y_cb() { return m_y_func[Bit].bind(); }
-
-	// public interfaces
-	void a1_w(int state);
-	void a2_w(int state);
-	void a3_w(int state);
-	void a4_w(int state);
-	void b1_w(int state);
-	void b2_w(int state);
-	void b3_w(int state);
-	void b4_w(int state);
-
-	int y1_r();
-	int y2_r();
-	int y3_r();
-	int y4_r();
-
-protected:
-	void a_w(uint8_t line, uint8_t state);
-	void b_w(uint8_t line, uint8_t state);
-	uint8_t y_r(uint8_t line);
-
-	// device-level overrides
-	virtual void device_start() override;
-	virtual void device_reset() override;
-
-private:
-	void update();
-
-	// callbacks
-	devcb_write_line::array<4> m_y_func;
-
-	// inputs
-	uint8_t m_a;        // pins 1,4,9,12
-	uint8_t m_b;        // pins 2,5,10,13
-
-	// outputs
-	uint8_t m_y;        // pins 3,6,8,11
-};
-
-// device type definition
-DECLARE_DEVICE_TYPE(TTL7400, ttl7400_device)
-
-#endif // MAME_MACHINE_7400_H